H E R C PRODUCTS INC
8-K, 1996-12-20
SPECIALTY CLEANING, POLISHING AND SANITATION PREPARATIONS
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                     U.S. SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                      ------------------------------------


                                    FORM 8-K

                                 CURRENT REPORT

       PURSUANT TO SECTION 13 OR 15(d) OF SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): December 17,1996





                         H.E.R.C. PRODUCTS INCORPORATED
             (Exact name of registrant as specified in its charter)


       Delaware                         1-13012                   86-0570800
- -----------------------------  -------------------------   --------------------
(State or other jurisdiction    (Commission File Number)       (IRS Employer
     of incorporation)                                      Identification No.)

 2202 West Lone Cactus Drive, Suite #15, Phoenix, Arizona            85027
- ----------------------------------------------------------        -----------
       (Address of principal executive offices)                    (Zip code)


                                       N/A
          -------------------------------------------------------------
          (Former name or former address, if changed since last report)




       Registrant's telephone number, including area code: (602) 492-0336





























                                        1

<PAGE>



Item 2.  Acquisition or Disposition of Assets

         On  December  17,  1996,  H.E.R.C.  Products  Incorporated  ("Company")
completed a private  placement of 170,000  shares of Class A Preferred  Stock to
accredited investors. The Company received aggregate proceeds of $1,700,000 from
this offering.  Perrin,  Holden & Davenport  Capital Corp.  ("PHD") acted as the
exclusive placement agent of the offering.  PHD was paid commissions of $170,000
(10%) and was issued a warrant  entitling it to purchase 85,000 shares of Common
Stock of the Company at a purchase price of $3.00 per share,  exercisable  until
December 10, 2001.

         The Class A Preferred Stock has a stated value of $10.00 per share. The
holders of the Class A Preferred Stock are entitled to receive  dividends at the
rate of 10% of the  stated  value  ($1.00  per share) per annum from the date of
issuance  through the conversion  date  ("Conversion  Date"),  payable solely in
shares of Common  Stock of the Company.  The holders of Class A Preferred  Stock
shall have the right, at such holder's option, at any time or from time to time,
to  convert  each share of Class A  Preferred  Stock and the  accrued  amount of
dividends thereon into a number of shares of Common Stock determined by dividing
the  stated  value of the Class A  Preferred  Stock  being  converted,  plus the
accrued dividends thereon through the Conversion Date, by the greater of (i) 75%
of the average  closing bid price of the Common  Stock for the five  consecutive
trading days ending  immediately prior to the date notice of conversion is given
to the Company ("Fair Market Value"),  or (ii) $.10. The Class A Preferred Stock
will  automatically  convert at the above rate on December 17, 1999.  Generally,
the  closing bid price will be as reported  by The Nasdaq  Stock  Market,  Inc.,
which is the principal  market for the Company's  Common Stock. The Company will
not issue any fractional shares of Common Stock pursuant to any conversion,  but
instead,  will round up or down to the nearest  whole number of shares  issuable
upon conversion.

         The Class A  Preferred  Stock does not carry any  redemption  or voting
rights. In the event of a liquidation, dissolution or winding up of the Company,
the holders of the Class A Preferred Stock will  participate with the holders of
the  Common  Stock  as if the  Class  A  Preferred  Stock  was  fully  converted
immediately prior to the event.

         The  Company  has agreed to register  for resale  under a  registration
statement  filed pursuant to the  Securities  Act of 1933, as amended,  and such
state "blue sky" laws as are reasonably  requested by the holders of the Class A
Preferred  Stock,  the shares of Common  Stock into which the Class A  Preferred
Stock and the related dividends may be converted and the Common Stock underlying
the warrant  issued to PHD.  The  Company has agreed to use its best  efforts to
have the registration  statement declared effective by February 14, 1997 and has
undertaken to have it declared  effective by April 15, 1997. If the registration
statement is not declared  effective by April 15, 1997, the  conversion  rate of
the Class A Preferred Stock will be reduced to 72.5% of the Fair Market Value.


Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits

         (a)      Unaudited Financial Statements of Business Acquired

                  Not applicable.



                                        2

<PAGE>




         (b)      Unaudited Pro Forma Financial Information

                  Not applicable.

         (c)      Exhibits


4.1         Form of Subscription Agreement between the Company and
            purchasers of the Class A Preferred Stock.
4.2         Warrant issued by the Company to Perrin, Holden & Davenport Capital
            Corp.
4.3         Agency Agreement between the Company and Perrin, Holden &
            Davenport Capital Corp. dated as of November 15, 1996, as amended
            on December 5, 1996.
99.1        Certificate of Designations, Preferences and Other Rights and
            Qualification of the Class A Preferred Stock, as amended.




                                        3

<PAGE>



                                    SIGNATURE


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


Dated:   December 19, 1996                       H.E.R.C. PRODUCTS INCORPORATED



                                               /s/ S. Steven Carl
                                         ---------------------------------------
                                          S. Steven Carl, Chairman of the Board
                                                 and Chief Executive Officer



                                              /s/ Gary S. Glatter
                                ------------------------------------------------
                                   Gary S. Glatter, President, Chief Operating
                                 Officer, Chief Financial Officer and Treasurer



                                        4

<PAGE>




                                                                  EXHIBIT 4.1
                             SUBSCRIPTION AGREEMENT


H.E.R.C. Products Incorporated
2202 West Lone Cactus Drive, Suite 15
Phoenix, Arizona  85027

Ladies and Gentlemen:


         Subscription. I (sometimes referred to herein as the "Investor") hereby
subscribe for and agree to purchase  $___________ of shares of Class A Preferred
Stock , $.01 par value ("Preferred Stock"), of H.E.R.C. Products Incorporated, a
Delaware corporation ("Company"),  on the terms and conditions set forth herein.
The per share offering price is $10.00 ("Share  Price") and the number of shares
of  Preferred  Stock being  purchased by me will be  calculated  by dividing the
above dollar amount by the per share offering price. Perrin,  Holden & Davenport
Capital  Corp.  ("PHD")  is acting  as the  exclusive  placement  agent for this
offering ("Placement Agent").

           Description  of  Preferred  Stock.  The rights of each share of
Preferred  Stock are as set forth in the  Certificate of  Designations  which is
included as Exhibit A in the Disclosure Package given to you simultaneously with
this Agreement ("Disclosure Package").

                   Purchase.

                  I hereby tender (i) the purchase price by wire transfer
to the following  account  ("Account")  maintained  by the Company's  attorneys,
Graubard Mollen & Miller:

                 Bankers Trust Company
                 280 Park Avenue
                 New York, New York  10017
                 ABA No.:  021001033
                 Attention:  Florence Blanchard
                 For further credit to:    Graubard Mollen & Miller
                                           Attorney Trust Account No. 42834468,

and (ii) two executed copies of this Subscription  Agreement and one copy of the
Subscriber  Questionnaire  to the Placement Agent at Perrin,  Holden & Davenport
Capital Corp., 17 John Street,  3rd Floor, New York, New York 10038,  Attention:
Mr. Jody Eisenman.

                   This offering  will  continue  until the earlier of the
Final Closing (as defined in Section 4 hereof) or November 30, 1996, unless such
latter date is extended,  without  notice to the Investor,  by mutual consent of
PHD and the Company to a date not later than  December  15,  1996  ("Termination
Date").  Prior  to the  earlier  of the  closing,  if any,  with  respect  to my
subscription or the Termination Date, my payment for the Preferred Stock will be
held by  Graubard  Mollen & Miller  in the  Account  subject  to the  terms  and
conditions  herein.  If subscriptions for at least $1,000,000 of Preferred Stock
are not received and accepted by the Company by the Termination Date, my payment
will be returned  to me without  interest  or  deduction.  Upon the earlier of a
closing for my  subscription  or completion of the offering,  I will be notified
promptly by the Company as to whether my subscription has been accepted.


                                        5

<PAGE>



                  Acceptance or Rejection of Subscription.

      The Company and PHD have the right to reject this  subscription  for
the Preferred Stock, in whole or in part for any reason and at any time prior to
a Closing (as defined in Section 4 hereof),  notwithstanding prior receipt by me
of notice of acceptance of my subscription.

      In the event of the rejection of this subscription,  my subscription
payment will be promptly  returned to me without  interest or deduction and this
Subscription  Agreement  shall  have  no  force  or  effect.  In  the  event  my
subscription  is accepted and the  offering is  completed,  the funds  specified
above shall be released to the  Company and the  certificates  representing  the
Preferred Stock will be promptly delivered to me.

          Closing.  The initial  closing of this offering may occur at any
time after the sale by the Company of  Preferred  Stock  aggregating  $1,000,000
("Initial  Closing"),  as determined jointly by the Company and PHD. Thereafter,
closings may occur from time to time, as  determined  jointly by the Company and
PHD,  until  Preferred  Stock  aggregating  $1,500,000  have been  sold  ("Final
Closing" and, with the Initial Closing and any interim closing,  a "Closing") or
the Termination Date,  whichever occurs sooner.  Notwithstanding  the foregoing,
PHD, with the Company's  consent,  will be able to adjourn any Closing until the
Termination Date to enable it to continue to obtain subscriptions for additional
Preferred  Stock up to the  maximum  number of shares of  Preferred  Stock being
offered by the Company in this  offering.  The Preferred  Stock  subscribed  for
herein  shall  not be deemed  issued to or owned by me until two  copies of this
Subscription Agreement have been executed by me and countersigned by the Company
and a Closing with respect to such Preferred Stock has occurred.

          Issuance  of  Securities.  At each  Closing,  the  Company  will
deliver the certificates  representing the Preferred Stock to me or my agent for
deposit  into my personal  securities  account at PHD or for delivery to me. The
certificates  representing  the Preferred  Stock and the common stock,  $.01 par
value,  of the  Company  ("Common  Stock")  into  which the  Preferred  Stock is
convertible shall be legended as follows:

                  THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE HAVE NOT BEEN
                  REGISTERED  UNDER  THE  SECURITIES  ACT OF  1933,  AS  AMENDED
                  ("ACT") OR  APPLICABLE  STATE  SECURITIES  LAWS AND MAY NOT BE
                  SOLD, PLEDGED,  OR OTHERWISE  TRANSFERRED WITHOUT AN EFFECTIVE
                  REGISTRATION  STATEMENT WITH RESPECT  THERETO UNDER THE ACT OR
                  PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF
                  SAID ACT AND COMPLIANCE WITHIN ANY APPLICABLE STATE SECURITIES
                  LAW,  OR UNLESS THE  COMPANY  RECEIVES  AN OPINION OF COUNSEL,
                  SATISFACTORY   TO  THE  COMPANY  AND  ITS  COUNSEL  THAT  SUCH
                  REGISTRATION IS NOT REQUIRED.

                  After the  Registration  Statement,  referenced  in  Section 6
hereinbelow,  is declared  effective by the Securities and Exchange  Commission,
the Investor may deliver to the Company the certificate  representing the Common
Stock of the Company  issued to such Investor  upon  conversion of the Preferred
Stock and the Company  will,  within three days after  receipt by the Company of
the  foregoing,  issue a new  certificate  representing  and in exchange for the
aforementioned certificate, which new certificate shall be legended as follows:

                                        6

<PAGE>



                  THE  SECURITIES  REPRESENTED  BY THIS  CERTIFICATE  HAVE  BEEN
                  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED.  THE
                  SECURITIES MAY BE SOLD PURSUANT TO THE REGISTRATION  STATEMENT
                  PROVIDED  THAT (i) THE  REGISTRATION  STATEMENT IS CURRENT AND
                  EFFECTIVE,  (ii)  THE  HOLDER  COMPLIES  WITH  THE  PROSPECTUS
                  DELIVERY  REQUIREMENTS  UNDER THE  SECURITIES  ACT OF 1933, AS
                  AMENDED,  AND (iii) THE SALE IS IN COMPLIANCE WITH THE PLAN OF
                  DISTRIBUTION SET FORTH IN THE PROSPECTUS.

                    Registration Rights.

                    The  Company  agrees  with  the  Investor  and  PHD to
register  under  a  registration  statement  ("Registration   Statement")  filed
pursuant to the Securities Act of 1933, as amended  ("Securities  Act") and such
state  "Blue  Sky"  laws of  those  states  as are  reasonably  selected  by the
Investor,  the  shares of Common  Stock into  which the  Preferred  Stock may be
converted and the shares of Common Stock underlying the warrants to be issued to
PHD in connection with this sale of securities by the Company (collectively, the
"Registrable Securities"). The Company agrees to file the Registration Statement
on or before the 30-day anniversary of the Initial Closing of the Offering.  The
Company  agrees  to use its  best  efforts  to have the  Registration  Statement
declared  effective by February 14, 1997 and undertakes to have the Registration
Statement declared effective by April 15, 1997. If the Registration Statement is
not declared  effective by the close of business on April 15, 1997,  as provided
in the  Certificate  of  Designations,  the  conversion  rate  will be  lowered.
Notwithstanding the foregoing reduction in the conversion rate, the Investor may
pursue all other legal remedies available to it for the failure to file and have
declared  effective  the  Registration  Statement as agreed to by the Company in
this Agreement.  The Company shall bear all the expenses and pay all the fees it
incurs in connection with the preparation,  filing and modification or amendment
of the Registration Statement. The Company shall keep the Registration Statement
effective and current until all the securities registered thereunder are sold or
until all such  securities  may be sold by the  holders  thereof  under Rule 144
without  volume   limitations.   Notwithstanding   the  foregoing,   during  any
consecutive  365-day  period,  the Company may suspend the  availability  of the
Registration Statement for no more than two periods of up to 20 consecutive days
and for no more than an aggregate of 40 days during any 365-day  period,  if the
Company's  Board  of  Directors  determines,  based  upon the  opinion  of legal
counsel, that there is valid purpose for such suspension.

                  To the extent permitted by law, the Company will indemnify and
hold harmless each holder of the Registrable Securities ("Holder"), the officers
and  directors of each Holder and each person,  if any, who controls such Holder
within the meaning of the Securities Act or Securities  Exchange Act of 1934, as
amended ("Exchange Act") against any losses, claims,  damages, or liabilities to
which they may become subject under the Securities  Act, the Exchange Act or any
state securities law or regulation (including all reasonable attorneys' fees and
other  expenses  reasonably  incurred in  investigating,  preparing or defending
against any claim whatsoever  incurred by the indemnified party in any action or
proceeding   between  the  indemnitor  and  indemnified  party  or  between  the
indemnified  party and any third  party or  otherwise)  to which any of them may
become subject under the  Securities  Act, the Exchange Act or any other statute
or common law or  otherwise  under the laws of foreign  countries,  arising from
such registration statement or based upon any untrue statement or alleged untrue
statement of a material fact contained in (i) any  preliminary  prospectus,  the
registration statement or prospectus

                                        7

<PAGE>



(as  from  time to time  each  may be  amended  and  supplemented);  (ii) in any
post-effective  amendment or  amendments or any new  registration  statement and
prospectus  in  which it  included  the  Registrable  Securities;  or (iii)  any
application  or other  document or written  communication  (collectively  called
"application")  executed  by the  Company  or  based  upon  written  information
furnished by the Company in any jurisdiction in order to qualify the Registrable
Securities  under the  securities  laws thereof or filed with the Securities and
Exchange Commission,  any state securities  commission or agency,  Nasdaq or any
securities exchange; or the omission or alleged omission therefrom of a material
fact required to be stated therein or necessary to make the statements  therein,
in light of the circumstances under which they were made, not misleading, unless
such statement or omission is made in reliance  upon,  and in strict  conformity
with, written  information  furnished to the Company with respect to such Holder
expressly for use in any preliminary prospectus,  such registration statement or
prospectus,  or any amendment or supplement thereof,  or in any application,  as
the case may be.  The  Company  agrees  promptly  to  notify  the  Holder of the
Registrable  Securities of the  commencement  of any  litigation or  proceedings
against the Company or any of its officers,  directors or controlling persons in
connection with the issue and sale or resale of the Registrable Securities or in
connection with any such registration statement or prospectus.

      Investor Agreements  Representations and Warranties.  I acknowledge,
represent and warrant to, and agree with, the Company and the Placement Agent as
follows:

      I am aware that my investment in the Company  involves a high degree
of risk,  and I carefully have read and fully  understand  the Company's  Annual
Report on Form 10-KSB for the fiscal year ended December 31, 1995, the Company's
Quarterly  Report on Form 10-QSB for the quarter ended  September 30, 1996,  the
Company's Proxy Statement dated June 11, 1996 and the Company's Prospectus dated
June 12, 1996,  which are included as Exhibits B, C, D and E,  respectively,  in
the Disclosure Package.

      I  acknowledge  and am aware  that there is no  assurance  as to the
future performance of the Company.

      I acknowledge that  notwithstanding the Company's commitment herein,
there can be no assurance that the Company will file any Registration  Statement
for the securities I am purchasing,  that such Registration Statement, if filed,
will be declared effective or, if declared  effective,  that the Company will be
able to keep it effective until I sell the Common Stock registered thereon.

      I am  purchasing  the  Preferred  Stock  for  my  own  account  for
investment and not with view to or for sale in connection with the  distribution
of the Preferred Stock,  nor with any present  intention of selling or otherwise
disposing of all or any part of the Preferred Stock. I understand that there may
not be any market for the Preferred  Stock. I agree that (1) the purchase of the
Preferred Stock is a long-term  investment,  (2) I may have to bear the economic
risk of  investment  for an  indefinite  period  of  time  because  neither  the
Preferred  Stock nor the Common Stock  underlying the Preferred  Stock have been
registered  under  the  Securities  Act  and,   notwithstanding   the  Company's
commitment  herein,  may not be  registered  and,  cannot  be  resold,  pledged,
assigned, or otherwise disposed of unless they are subsequently registered under
said Securities Act and under applicable securities laws of certain states or an
exemption from such registration is available.  I understand that the Company is
under no  obligation to register the  Preferred  Stock and,  except as set forth
herein,  the  Company  is under no  obligation  to  register  the  Common  Stock
underlying the Preferred Stock on my behalf or to assist me in

                                        8

<PAGE>



complying with any exemption from such registration  under the Securities Act or
any state  securities  laws.  I hereby  authorize  the Company to place  legends
denoting  the  restrictions  on the  Preferred  Stock and the Common Stock to be
issued hereunder or conversion of the Preferred Stock, as the case may be.

      I recognize that the Preferred  Stock, as an investment,  involves a
high degree of risk  including,  but not limited to, the risk of economic losses
from  operations of the Company and the total loss of my  investment.  I believe
that the  investment  in the  Preferred  Stock is suitable  for me based upon my
investment  objectives  and  financial  needs,  and I have  adequate  means  for
providing for my current  financial needs and contingencies and have no need for
liquidity with respect to my investment in the Company.

      I have been given access to full and complete information  regarding
the Company and have utilized such access to my satisfaction  for the purpose of
obtaining  information in addition to, or verifying information included in, the
Disclosure  Package,  and I have  either  met  with  or  been  given  reasonable
opportunity  to meet with  officers  of the  Company  for the  purpose of asking
questions of, and receiving answers from, such officers concerning the terms and
conditions  of  the  offering  of the  Preferred  Stock  and  the  business  and
operations  of the  Company  and to obtain any  additional  information,  to the
extent  reasonably  available.  I have  received  all  information  and material
regarding the Company that I have requested.

      I have such  knowledge  and  experience  in  financial  and business
matters as to be capable of evaluating  the merits and risks of an investment in
the Preferred Stock and have obtained,  in my judgment,  sufficient  information
from the  Company  to  evaluate  the merits  and risks of an  investment  in the
Company.  I have not  utilized  any  person as my  purchaser  representative  as
defined in Regulation D promulgated by the  Securities  and Exchange  Commission
pursuant to the Securities  Act in connection  with  evaluating  such merits and
risks.

      I have relied solely upon my own  investigation in making a decision
to invest in the Company.

     I have  received no  representation  or warranty from the Company or
the Placement Agent or any of their respective officers, directors, employees or
agents in  respect  of my  investment  in the  Company  and I have  received  no
information  (written  or  otherwise)  from them  relating to the Company or its
business other than as set forth herein and in the Disclosure  Package. I am not
participating   in  the  offer  as  a  result  of  or  subsequent  to:  (I)  any
advertisement,   article,   notice  or  other  communication  published  in  any
newspaper,  magazine or similar media or broadcast  over  television or radio or
(ii) any seminar or meeting  whose  attendees  have been  invited by any general
solicitation or general advertising.

      I  have  had  full  opportunity  to ask  questions  and to  receive
satisfactory  answers concerning the offering and other matters pertaining to my
investment and all such questions have been answered to my full satisfaction. In
addition, as required by Section 517.061(11)(a)(3), Florida Statutes and by Rule
3-500.05(a) thereunder, if I am a Florida resident I may have, at the offices of
the Company,  at any reasonable  hour, after  reasonable  notice,  access to the
materials  set  forth  in  the  Rule  which  the  Company  can  obtain   without
unreasonable effort or expense.


                                        9

<PAGE>



      I have  been  provided  an  opportunity  to  obtain  any  additional
information concerning the offering and the Company and all other information to
the extent the  Company  possesses  such  information  or can acquire it without
unreasonable effort or expense.

      I am an "accredited investor" as defined in Section 2(15) of the Act
and in Rule 501 promulgated thereunder.

      I  understand  that  (i) the  Preferred  Stock  and  the  underlying
securities have not been registered  under the Securities Act, or the securities
laws of certain  states in reliance on specific  exemptions  from  registration,
(ii) no  securities  administrator  of any state or the federal  government  has
recommended  or endorsed  this  offering  or made any  finding or  determination
relating to the fairness of an  investment  in the Company and (iii) the Company
is relying on my  representations  and agreements for the purpose of determining
whether this transaction  meets the  requirements of the exemptions  afforded by
the Securities Act and certain state securities laws.

      I have been urged to seek  independent  advice from my  professional
advisors  relating to the suitability of an investment in the Company in view of
my overall financial needs and with respect to the legal and tax implications of
such investment.

      If the Investor is a corporation,  company,  trust, employee benefit
plan, individual retirement account,  Keogh Plan, or other tax-exempt entity, it
is authorized  and qualified to become an Investor in the Company and the person
signing  this  Subscription  Agreement  on behalf of such  entity  has been duly
authorized by such entity to do so.

      I hereby  acknowledge  and am aware that  except for any  rescission
rights that may be provided under  applicable laws, I am not entitled to cancel,
terminate or revoke this  subscription,  and any  agreements  made in connection
herewith shall survive my death or disability.

      I hereby  acknowledge  that I have  been told that (ii) PHD is being
compensated as the Placement Agent and will receive a cash  commission  equal to
10% of the aggregate  purchase price of the Preferred Stock sold in the offering
to all  Investors and will be issued a warrant to purchase that number of shares
of Common Stock that equals the number of shares of Preferred  Stock sold in the
Offering divided by two, exercisable at $3.00 per share for the five years after
the last Closing and (iii) the Common Stock underlying the warrant issued to PHD
is being registered under the Securities Act on the same registration  statement
as the  shares of Common  Stock  which will be  issuable  on  conversion  of the
Preferred Stock.

      I agree  that prior to the  conversion  of all the  Preferred  Stock
purchased hereunder,  I will not sell the Common Stock "short" on any securities
market on which the Common Stock is traded.

           Indemnification.  I hereby agree to indemnify and hold harmless
PHD and the Company, each of their respective officers, directors, shareholders,
employees,  agents, and attorneys against any and all losses,  claims,  demands,
liabilities,  and  expenses  (including  reasonable  legal  or  other  expenses,
including  reasonable  attorneys' fees and other expenses reasonably incurred in
investigating,  preparing or defending against any claim whatsoever  incurred by
the  indemnified  party in any action or proceeding  between the  indemnitor and
indemnified  party or  between  the  indemnified  party and any  third  party or
otherwise) incurred by

                                       10

<PAGE>



each such person in connection with defending or  investigating  any such claims
or  liabilities,  whether or not resulting in any  liability to such person,  to
which any such  indemnified  party may become subject under the Securities  Act,
under any other  statute,  at common law or  otherwise,  insofar as such losses,
claims, demands, liabilities and expenses (a) arise out of or are based upon any
untrue  statement or alleged untrue  statement of a material fact made by me and
contained in this Subscription  Agreement, or (b) arise out of or are based upon
any  breach  by me of any  representation,  warranty,  or  agreement  made by me
contained  herein.  PHD is a third-party  beneficiary of this Section,  and this
Section may not be modified or amended  without the prior  written  agreement of
PHD.

           Severability.  In the  event  any  part  of  this  Subscription
Agreement are found to be void,  the remaining  provisions of this  Subscription
Agreement shall  nevertheless be binding with the same effect as though the void
parts were deleted.

          Choice of Law and Jurisdiction. This Subscription Agreement will
be deemed to have been made and  delivered in New York City and will be governed
as to validity,  interpretation,  construction, effect and in all other respects
by the internal laws of the State of New York. The Company and the Investor each
hereby (i) agrees that any legal suit,  action or  proceeding  arising out of or
relating to this Subscription  Agreement shall be instituted  exclusively in New
York State Supreme Court,  County of New York, or in the United States  District
Court for the Southern  District of New York,  (ii) waives any  objection to the
venue of any such suit,  action or proceeding  and the right to assert that such
forum is not a convenient forum,  proceeding,  and (iii) irrevocably consents to
the  jurisdiction  of the New York State Supreme Court,  County of New York, and
the United States  District  Court for the Southern  District of New York in any
such suit,  action or proceeding  and the Company  further  agrees to accept and
acknowledge service or any and all process which may be served in any such suit,
action or proceeding in New York State Supreme  Court,  County of New York or in
the United  States  District  Court for the  Southern  District  of New York and
agrees that service of process  upon it mailed by certified  mail to its address
shall be deemed in every  respect  effective  service of process  upon it in any
suit, action or proceeding.

          Counterparts. This Subscription Agreement may be executed in one
or more counterparts, each of which shall be deemed an original but all of which
together  shall  constitute one and the same  instrument.  The execution of this
Subscription Agreement may be by actual or facsimile signature.


          Benefit.  This Subscription  Agreement shall be binding upon and
inure to the  benefit  of the  parties  hereto  (and PHD to the  extent  it is a
third-party beneficiary hereof) and their respective heirs, executors,  personal
representatives, successors and assigns. PHD shall be deemed to be a third-party
beneficiary  with  respect  to any  sections  hereof  which  so  state  or which
otherwise  indicate  that PHD would be entitled to rely on the  representations,
warranties or covenants made by me therein.

          Notices and Addresses. All notices,  offers,  acceptance and any
other  acts under  this  Subscription  Agreement  (except  payment)  shall be in
writing,  and shall be  sufficiently  given if  delivered to the  addressees  in
person, by Federal Express or similar courier delivery by facsimile delivery or,
if mailed,  postage prepaid,  by certified mail,  return receipt  requested,  as
follows:


                                       11

<PAGE>



 Investor:                  At the address designated on the signature page of
                                  this Subscription Agreement.

 The Company:               H.E.R.C. Products Incorporated
                            2202 West Lone Cactus Drive, Suite 15
                            Phoenix, Arizona 85027
                            Attention: S. Steven Carl, Chief Executive Officer
                            Fax: (602) 492-0336

 Placement Agent:           Perrin, Holden & Davenport Capital Corp.
                            17 John Street, 3rd Floor
                            New York, New York  10038
                            Attention:  Jody Eisenman
                            Fax:  (212) 566-4977

 in any case,
 with a copy to:            Graubard Mollen & Miller
                            600 Third Avenue
                            New York, New York 10016-2097
                            Attention:  David Alan Miller, Esq.
                            Fax:  (212) 818-8881

or to such other  address as any of them,  by notice to the others may designate
from time to time.  The  transmission  confirmation  receipt  from the  sender's
facsimile machine shall be conclusive evidence of successful  facsimile deliver.
Time shall be counted to, or from, as the case may be, the delivery in person or
by mailing.

          Oral  Evidence.  This  Subscription  Agreement  constitutes  the
entire  agreement  between the parties with respect to the subject matter hereof
and supersedes all prior oral and written  agreements between the parties hereto
with respect to the subject matter hereof.  This Subscription  Agreement may not
be changed,  waived,  discharged,  or terminated  orally but, rather,  only by a
statement in writing signed by the party or parties against which enforcement or
the change, waiver, discharge or termination is sought.

          Section Headings. Section headings herein have been inserted for
reference  only and shall not be deemed  to limit or  otherwise  affect,  in any
matter,  or be  deemed  to  interpret  in whole or in part,  any of the terms or
provisions of this Subscription Agreement.

          Survival of  Representations,  Warranties  and  Agreements.  The
representations,  warranties and agreements  contained  herein shall survive the
delivery of, and the payment for, the Preferred Stock.

           Acceptance  of  Subscription.  The  Company  may  accept  this
Subscription Agreement at any time for all or any portion of the Preferred Stock
subscribed  for by executing a copy hereof as provided and notifying me within a
reasonable time thereafter.

         RESIDENTS OF ALL STATES:  THE UNITS OFFERED HEREBY HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT, AS AMENDED, OR THE SECURITIES LAWS
OF ANY STATE AND ARE BEING OFFERED AND SOLD IN RELIANCE ON EXEMPTIONS
FROM THE REGISTRATION REQUIREMENTS OF SAID ACT AND SUCH LAWS.  THE UNITS

                                       12

<PAGE>



ARE  SUBJECT  TO  RESTRICTION  ON  TRANSFERABILITY  AND  RESALE  AND  MAY NOT BE
TRANSFERRED OR RESOLD EXCEPT AS PERMITTED  UNDER SAID ACT AND SUCH LAWS PURSUANT
TO REGISTRATION OR EXEMPTION THEREFROM. INVESTORS SHOULD BE AWARE THAT THEY WILL
BE REQUIRED TO BEAR THE  FINANCIAL  RISKS OF THIS  INVESTMENT  FOR AN INDEFINITE
PERIOD  OF TIME.  THE  UNITS  HAVE  NOT  BEEN  APPROVED  OR  DISAPPROVED  BY THE
SECURITIES AND EXCHANGE  COMMISSION,  ANY STATE  SECURITIES  COMMISSION OR OTHER
REGULATORY  AUTHORITY,  NOR HAVE ANY OF THE FOREGOING AUTHORITIES PASSED UPON OR
ENDORSED  THE  MERITS  OF THE  OFFERING  OR THE  ACCURACY  OR  ADEQUACY  OF THIS
CONFIDENTIAL INVESTMENT SUMMARY. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

         FOR CONNECTICUT  RESIDENTS:  THE UNITS OFFERED HAVE NOT BEEN REGISTERED
UNDER SECTION 36-485 OF THE CONNECTICUT  UNIFORM  SECURITIES ACT AND ARE OFFERED
AND SOLD  PURSUANT TO AN  EXEMPTION  RELATING TO  TRANSACTIONS  NOT  INVOLVING A
PUBLIC OFFERING PURSUANT TO SECTION 36- 490(b)(9)(A)  THEREOF.  THE UNITS CANNOT
BE RESOLD OR TRANSFERRED  UNLESS THEY ARE REGISTERED UNDER SUCH ACT OR UNLESS AN
EXEMPTION FROM REGISTRATION IS AVAILABLE.

         FOR MARYLAND RESIDENTS: THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER
THE MARYLAND  SECURITIES  ACT BY REASON OF AN EXEMPTION  RELATING TO THE LIMITED
AVAILABILITY  OF THE OFFERING.  THESE  SECURITIES MAY NOT BE TRANSFERRED OR SOLD
EXCEPT IN A  TRANSACTION  WHICH IS EXEMPT UNDER THE MARYLAND  SECURITIES  ACT OR
PURSUANT TO AN EFFECTIVE REGISTRATION.

         FOR NEW JERSEY  RESIDENTS:  THESE  SECURITIES HAVE NOT BEEN APPROVED OR
DISAPPROVED  BY THE BUREAU OF  SECURITIES OF THE STATE OF NEW JERSEY NOR HAS THE
BUREAU  PASSED ON OR  ENDORSED  THE MERITS OF THIS  OFFERING.  THE FILING OF THE
WITHIN OFFERING DOES NOT CONSTITUTE APPROVAL OF THE ISSUE OR THE SALE THEREOF BY
THE BUREAU OF SECURITIES. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

         THESE ARE SPECULATIVE SECURITIES AND INVOLVE A HIGH DEGREE OF RISK.
THESE SECURITIES ARE OFFERED ONLY TO BONA FIDE ADULT RESIDENTS OF THE
STATE OF NEW JERSEY.

         FOR FLORIDA  RESIDENTS:  THE  SECURITIES  OFFERED  HEREBY HAVE NOT BEEN
REGISTERED  UNDER THE FLORIDA  SECURITIES AND INVESTOR  PROTECTION ACT ("FLORIDA
SECURITIES ACT") , AND THEY THEREFORE HAVE THE STATUS OF SECURITIES  ACQUIRED IN
AN EXEMPT  TRANSACTION UNDER SECTION 517.061 OF THE FLORIDA SECURITIES ACT. EACH
OFFEREE WHO IS A FLORIDA RESIDENT SHOULD BE AWARE THAT SECTION 517.061(11)(a)(5)
OF THE FLORIDA  SECURITIES ACT PROVIDES THAT WHEN SALES ARE MADE TO FIVE OR MORE
PERSONS IN FLORIDA, ANY SALE MADE IN FLORIDA IS VOIDABLE BY THE PURCHASER WITHIN
THREE DAYS AFTER THE FIRST TENDER OF  CONSIDERATION IS MADE BY SUCH PURCHASER TO
THE COMPANY, AN AGENT OF THE COMPANY OR AN ESCROW AGREEMENT OR WITHIN THREE DAYS
AFTER THE  AVAILABILITY  OF THAT PRIVILEGE IS  COMMUNICATED  TO SUCH  PURCHASER,
WHICH EVER OCCURS LATER.


                                       13

<PAGE>



         THE  AVAILABILITY  OF THE  PRIVILEGE TO VOID SALES  PURSUANT TO SECTION
517.061(11)(a)(5) IS HEREBY COMMUNICATED TO EACH FLORIDA OFFEREE.


                                       14

<PAGE>



         Manner in Which Title is to be Held.  (check one)

     ____ Individual Ownership
     ____ Community Property
     ____ Joint  Tenant with Right of  Survivorship  (both  parties must  sign) 
     ____ Partnership 
     ____ Tenants  in common
     ____ Corporation 
     ____ Trust
     ____ Other (please indicate)


INDIVIDUAL INVESTORS                          ENTITY INVESTORS


- ----------------------------------------        -------------------------------
Signature (Individual)                          Name of Entity, if any


                                                By:

                                                     *Signature

                                                Its
- -----------------------------------------          ----------------------------
Signature (all record holders should sign)            Title


- -----------------------------------------          ----------------------------
Name(s) Typed or Printed                               Name Typed or Printed

Address to Which Correspondence                 Address to Which Correspondence
Should be Directed                              Should be Directed

- -----------------------------------------       -------------------------------
- -----------------------------------------       -------------------------------
- -----------------------------------------       -------------------------------
City, State and Zip Code                        City, State and Zip Code

- -----------------------------------------       -------------------------------
Social Security Number                          Tax Identification

*        If  Preferred  Stock  is  being  subscribed  for  by  any  entity,  the
         Certificate of Signatory on the next page must also be completed.

The foregoing subscription is accepted and the Company hereby agrees to be bound
by its terms.

                                                H.E.R.C. PRODUCTS INCORPORATED


Dated:------------------, 1996                       By:

                                       15

<PAGE>



                            CERTIFICATE OF SIGNATORY


(To be completed if Preferred Stock is being subscribed for by an entity)




         I, _______________________________, the

- --------------------------------
       (name of signatory)                           (title)

of ----------------------------------------------------------("Entity"), a
                       (name of entity)

 -----------------------------------------------.
                  (type of entity)

hereby  certify  that the  above  entity is duly  empowered  and  authorized  to
purchase the Preferred  Stock and that I am duly empowered and authorized by the
entity to execute the Subscription Agreement on its behalf.


         IN WITNESS  WHEREOF,  I have executed this Certificate this ____ day of
_________, 1996.



                                                -----------------------------
                                                        (Signature)


                                       16
<PAGE>



                                                                   EXHIBIT 4.2

            THE REGISTERED HOLDER OF THIS WARRANT, BY ITS ACCEPTANCE
            HEREOF, AGREES THAT IT WILL NOT SELL, TRANSFER OR ASSIGN
                     THIS WARRANT EXCEPT AS HEREIN PROVIDED.

              VOID AFTER 5:00 P.M. EASTERN TIME, DECEMBER 10, 2001

                                     WARRANT

                               For the Purchase of

                          85,000 Shares of Common Stock

                                       of

                         H.E.R.C. PRODUCTS INCORPORATED


I.       Warrant.

         THIS  CERTIFIES  THAT,  in  consideration  of $10.00 and other good and
valuable consideration,  duly paid by or on behalf of Perrin, Holden & Davenport
Capital Corp.  ("PHD" or  "Holder"),  as  registered  owner of this Warrant,  to
H.E.R.C.  Products Incorporated  ("Company"),  older is entitled, at any time or
from time to time at or after,  December 17, 1996 ("Commencement  Date"), and at
or before 5:00 p.m., Eastern Time December 10, 2001 ("Expiration Date"), but not
thereafter,  to subscribe for, purchase and receive,  in whole or in part, up to
eighty-five  thousand  (85,000) shares of Common Stock of the Company,  $.01 par
value  ("Common  Stock").  If the  Expiration  Date  is a day on  which  banking
institutions are authorized by law to close,  then this Warrant may be exercised
on the next  succeeding day which is not such a day in accordance with the terms
herein.  During the period ending on the Expiration Date, the Company agrees not
to take any action that would  terminate the Warrant.  This Warrant is initially
exercisable  at $3.00 per share of Common Stock  purchased;  provided,  however,
that upon the occurrence of any of the events specified in Section 6 hereof, the
rights  granted by this Warrant,  including the exercise price and the number of
shares of Common Stock to be received upon such  exercise,  shall be adjusted as
therein  specified.  The term "Exercise  Price" shall mean the initial  exercise
price or the adjusted  exercise price,  depending on the context,  of a share of
Common  Stock.  The term  "Securities"  shall  mean the  shares of Common  Stock
issuable  upon  exercise  of this  Warrant.  This  Warrant  is being  issued  in
connection  with  the  offering  (the  "Offering")  by the  Company  of  Class A
Preferred  Stock,  in which  PHD has  acted as the  exclusive  placement  agent.
Capitalized  terms  used  herein,  but not  otherwise  defined,  shall  have the
meanings  set forth in the Agency  Agreement  between PHD and the  Company  with
respect to the Offering.

II.      Exercise.

     1. Exercise  Form.  In order to exercise  this  Warrant,  the exercise form
attached  hereto  must be duly  executed  and  completed  and  delivered  to the
Company,  together  with this Warrant and payment of the Exercise  Price for the
Securities being purchased.  If the subscription rights represented hereby shall
not be exercised at or before 5:00 p.m.,  Eastern time, on the Expiration  Date,
this Warrant shall become and be void without  further force or effect,  and all
rights represented hereby shall cease and expire.




                                        1

<PAGE>



     2. Legend.  Each  certificate  for Securities  purchased under this Warrant
shall bear a legend as follows,  unless  such  Securities  have been  registered
under the Securities Act of 1933, as amended ("Act"):

         "The  securities   represented  by  this   certificate  have  not  been
         registered  under the  Securities  Act of 1933,  as amended  ("Act") or
         applicable  state law. The securities may not be offered for sale, sold
         or otherwise  transferred except pursuant to an effective  registration
         statement under the Act, or pursuant to an exemption from  registration
         under the Act and applicable state law."

     3. Conversion Right.

                  (a)  Determination  of Amount.  In lieu of the  payment of the
Exercise Price in cash, the Holder shall have the right (but not the obligation)
to convert this  Warrant,  in whole or in part,  into Common Stock  ("Conversion
Right"),  as follows:  upon exercise of the Conversion  Right, the Company shall
deliver to the  Holder  (without  payment  by the Holder of any of the  Exercise
Price) that number of shares of Common Stock equal to the  quotient  obtained by
dividing (x) the "Value" (as defined  below) of the portion of the Warrant being
converted at the time the Conversion Right is exercised by (y) the Market Price.
The  "Value" of the  portion of the  Warrant  being  converted  shall  equal the
remainder  derived from  subtracting  (a) the Exercise  Price  multiplied by the
number of shares of Common  Stock being  converted  from (b) the Market Price of
the  Common  Stock  multiplied  by the  number of shares of Common  Stock  being
converted.  As used herein,  the term "Market Price" at any date shall be deemed
to be the last reported sale price of the Common Stock on such date, or, in case
no such  reported sale takes place on such day, the average of the last reported
sale prices for the immediately  preceding three trading days, in either case as
officially  reported by the  principal  securities  exchange on which the Common
Stock is listed or admitted to trading, or, if the Common Stock is not listed or
admitted to trading on any national  securities exchange or if any such exchange
on which the Common Stock is listed is not its  principal  trading  market,  the
last reported sale price as furnished by the National  Association of Securities
Dealers,  Inc.  ("NASD")  through the Nasdaq National Market or SmallCap Market,
or, if applicable,  the OTC Bulletin Board, or if the Common Stock is not listed
or admitted to trading on any of the foregoing markets, or similar organization,
as  determined  in good faith by  resolution  of the Board of  Directors  of the
Company, based on the best information available to it.

                  (b) Exercise of Conversion  Right. The Conversion Right may be
exercised by the Holder on any business  day on or after the  Commencement  Date
and not later than the  Expiration  Date by  delivering  the Warrant with a duly
executed exercise form attached hereto with the conversion  section completed to
the Company,  exercising the Conversion Right and specifying the total number of
shares of Common Stock the Holder will purchase pursuant to such conversion.

III.     Transfer.

         1. General Restrictions.  The registered Holder of this Warrant, by its
acceptance  hereof,  agrees  that  it will  not  sell,  transfer  or  assign  or
hypothecate  this Warrant to anyone except upon compliance  with, or pursuant to
exemptions  from,  applicable  securities  laws.  In order to make any permitted
assignment,  the Holder must deliver to the Company the assignment form attached
hereto duly  executed and  completed,  together with this Warrant and payment of
all transfer taxes, if any, payable in connection  therewith.  The Company shall
immediately  transfer this Warrant on the books of the Company and shall execute
and deliver



                                        2

<PAGE>



a new Warrant or Warrants of like tenor to the appropriate assignee(s) expressly
evidencing the right to purchase the aggregate  number of shares of Common Stock
purchasable hereunder or such portion of such number as shall be contemplated by
any such assignment.

         2.  Restrictions  Imposed by the  Securities  Act. This Warrant and the
Securities underlying this Warrant shall not be transferred unless and until (i)
the  Company  has  received  the  opinion  of counsel  for the Holder  that such
securities may be sold pursuant to an exemption from registration under the Act,
and  applicable  state law,  the  availability  of which is  established  to the
reasonable  satisfaction  of  the  Company,  or  (ii) a  registration  statement
relating to such Securities has been filed by the Company and declared effective
by the Securities and Exchange  Commission and compliance with applicable  state
law.

IV.      New Warrants to be Issued.

         1. Partial Exercise or Transfer. Subject to the restrictions in Section
3 hereof,  this Warrant may be exercised or assigned in whole or in part. In the
event of the exercise or assignment  hereof in part only, upon surrender of this
Warrant for cancellation, together with the duly executed exercise or assignment
form and funds (or conversion  equivalent)  sufficient to pay any Exercise Price
and/or  transfer  tax,  the Company  shall cause to be  delivered  to the Holder
without  charge a new  Warrant of like tenor to this  Warrant in the name of the
Holder  evidencing  the right of the Holder to purchase the aggregate  number of
shares of Common  Stock and  Warrants  purchasable  hereunder  as to which  this
Warrant has not been exercised or assigned.

         2.  Lost   Certificate.   Upon  receipt  by  the  Company  of  evidence
satisfactory to it of the loss, theft, destruction or mutilation of this Warrant
and of reasonably  satisfactory  indemnification,  the Company shall execute and
deliver a new Warrant of like tenor and date. Any such new Warrant  executed and
delivered  as a result of such loss,  theft,  mutilation  or  destruction  shall
constitute a substitute contractual obligation on the part of the Company.

V.       Registration Obligation.

         1. Filing of Registration  Statement.  The Company shall register under
the  registration  statement  ("Registration  Statement")  to be  filed  for the
subscribers for shares of Preferred Stock in the Offering,  the shares of Common
Stock underlying this Warrant ("Registrable Securities"). The Company shall file
the  Registration  Statement on or before the 30-day  anniversary of the Initial
Closing of the  Offering.  The  Company  shall use its best  efforts to have the
Registration Statement declared effective by February 14, 1997 and undertakes to
have it declared  effective  by April 15, 1997.  The Company  shall bear all the
expenses  and pay all the fees it incurs  in  connection  with the  preparation,
filing and modification or amendment of the Registration Statement.  The Company
shall  keep the  Registration  Statement  effective  and  current  until all the
Registrable  Securities are sold or until all such securities may be sold by the
holders  thereof  under  Rule  144,  without  volume  limitations.   During  any
consecutive  365-day  period,  the Company may suspend the  availability  of the
Registration Statement for no more than two periods of up to 20 consecutive days
and for no more than an aggregate of 40 days during any 365-day  period,  if the
Company's  Board  of  Directors  determines,  based  upon the  opinion  of legal
counsel, that there is a valid purpose for such suspension.



                                        3

<PAGE>




         2.       General Terms

     (a) Indemnification.

     a. The Company shall indemnify the Holder(s) of the Registrable  Securities
to be sold pursuant to any registration  statement hereunder and any underwriter
or person deemed to be an underwriter under the Act and each person, if any, who
controls  such  Holders or  underwriters  or persons  deemed to be  underwriters
within the meaning of Section 15 of the Act or Section  20(a) of the  Securities
Exchange Act of 1934,  as amended  ("Exchange  Act"),  against all loss,  claim,
damage, expense or liability (including all reasonable attorneys' fees and other
expenses  reasonably  incurred in investigating,  preparing or defending against
any claim whatsoever) to which any of them may become subject under the Act, the
Exchange  Act or  otherwise,  arising  from  such  registration  statement.  The
Holder(s) of the Registrable Securities to be sold pursuant to such registration
statement,  and their successors and assigns, shall severally,  and not jointly,
indemnify the Company,  against all loss,  claim,  damage,  expense or liability
(including all reasonable attorneys' fees and other expenses reasonably incurred
in investigating,  preparing or defending against any claim whatsoever) to which
they may become  subject under the Act, the Exchange Act or  otherwise,  arising
from  information  furnished by or on behalf of such  Holders,  in writing,  for
specific inclusion in such registration statement.

     b. If any action is brought against a party hereto,  ("Indemnified  Party")
in  respect  of  which   indemnity  may  be  sought   against  the  other  party
("Indemnifying   Party"),   such   Indemnified   Party  shall  promptly   notify
Indemnifying Party in writing of the institution of such action and Indemnifying
Party shall assume the defense of such action, including the employment and fees
of counsel  reasonably  satisfactory to the Indemnified  Party. Such Indemnified
Party  shall have the right to employ its or their own counsel in any such case,
but the fees and  expenses  of such  counsel  shall  be at the  expense  of such
Indemnified  Party unless (i) the  employment  of such  counsel  shall have been
authorized in writing by  Indemnifying  Party in connection  with the defense of
such  action,  or (ii)  Indemnifying  Party shall not have  employed  counsel to
defend such action,  or (iii) such Indemnified  Party shall have been advised by
counsel that there may be one or more legal  defenses  available to it which may
result in a conflict between the Indemnified  Party and  Indemnifying  Party (in
which case Indemnifying  Party shall not have the right to direct the defense of
such action on behalf of the  Indemnified  Party),  in any of which events,  the
reasonable  fees and expenses of not more than one additional  firm of attorneys
designated in writing by the  Indemnified  Party shall be borne by  Indemnifying
Party. Notwithstanding anything to the contrary contained herein, if Indemnified
Party shall  assume the defense of such action as provided  above,  Indemnifying
Party shall not be liable for any settlement of any such action effected without
its written consent.

     c. If the  indemnification  or  reimbursement  provided  for  hereunder  is
finally  judicially  determined  by a  court  of  competent  jurisdiction  to be
unavailable  to an  Indemnified  Party (other than as a  consequence  of a final
judicial  determination of willful misconduct,  bad faith or gross negligence of
such Indemnified Party), then Indemnifying Party agrees, in lieu of indemnifying
such  Indemnified  Party,  to  contribute  to the amount paid or payable by such
Indemnified  Party (i) in such  proportion  as is  appropriate  to  reflect  the
relative benefits received,  or sought to be received,  by Indemnifying Party on
the one hand and by such Indemnified Party on the other or (ii) if (but only if)
the  allocation  provided  in clause (i) of this  sentence is not  permitted  by
applicable  law, in such  proportion as is  appropriate  to reflect not only the
relative  benefits referred to in such clause (i) but also the relative fault of
Indemnifying Party and of such Indemnified Party; provided,  however, that in no
event shall the aggregate



                                        4

<PAGE>



amount  contributed by a Holder exceed the profit, if any, earned by such Holder
as a result of the  exercise by him of the  Warrants  and the sale by him of the
underlying shares of Common Stock.

     d.  The  rights  accorded  to  Indemnified  Parties  hereunder  shall be in
addition  to any rights  that any  Indemnified  Party may have at common law, by
separate agreement or otherwise.

     (b)  Exercise of  Warrants.  Nothing  contained  in this  Warrant  shall be
construed as requiring  the  Holder(s) to exercise  their  Warrants  prior to or
after the initial  filing of any  registration  statement  or the  effectiveness
thereof.

VI.      Adjustments

     1.  Adjustments to Exercise  Price and Number of  Securities.  The Exercise
Price and the number of shares of Common Stock  underlying this Warrant shall be
subject to adjustment from time to time as hereinafter set forth:

                  (a)  Stock  Dividends  -  Recapitalization,  Reclassification,
Split-Ups.  If, after the date hereof,  and subject to the provisions of Section
6.2 below,  the number of  outstanding  shares of Common Stock is increased by a
stock  dividend on the Common  Stock  payable in shares of Common  Stock or by a
split-up,  recapitalization  or  reclassification  of shares of Common  Stock or
other similar event,  then, on the effective date thereof,  the number of shares
of Common  Stock  issuable on exercise of this  Warrant  shall be  increased  in
proportion to such increase in outstanding shares.

                  (b)  Aggregation  of  Shares.  If after the date  hereof,  and
subject to the  provisions of Section 6.3, the number of  outstanding  shares of
Common Stock is decreased by a consolidation, combination or reclassification of
shares of Common Stock or other similar  event,  then,  upon the effective  date
thereof,  the number of shares of Common  Stock  issuable  on  exercise  of this
Warrant shall be decreased in proportion to such decrease in outstanding shares.

                  (c)  Adjustments  in Exercise  Price.  Whenever  the number of
shares  of  Common  Stock  purchasable  upon the  exercise  of this  Warrant  is
adjusted,  as provided in this Section 6.1, the Exercise Price shall be adjusted
(to the nearest cent) by multiplying  such Exercise Price  immediately  prior to
such  adjustment by a fraction (x) the numerator of which shall be the number of
shares of Common Stock purchasable upon the exercise of this Warrant immediately
prior to such  adjustment,  and (y) the denominator of which shall be the number
of shares of Common Stock so purchasable immediately thereafter.

                  (d)  Replacement of Securities  upon  Reorganization,  etc. In
case of any  reclassification  or  reorganization  of the outstanding  shares of
Common Stock other than a change covered by Section 6.1.1 hereof or which solely
affects  the par value of such  shares of  Common  Stock,  or in the case of any
merger or consolidation of the Company with or into another  corporation  (other
than  a  consolidation  or  merger  in  which  the  Company  is  the  continuing
corporation and which does not result in any  reclassification or reorganization
of the  outstanding  shares  of  Common  Stock),  or in the  case of any sale or
conveyance to another corporation or entity of the property of the Company as an
entirety or substantially as an entirety in connection with which the Company is
dissolved, the Holder of this Warrant shall have the right thereafter (until the
expiration of the right of exercise of this Warrant) to receive upon the



                                        5

<PAGE>



exercise  hereof,  for the  same  aggregate  Exercise  Price  payable  hereunder
immediately prior to such event, the kind and amount of shares of stock or other
securities or property  (including cash) receivable upon such  reclassification,
reorganization,  merger or  consolidation,  or upon a dissolution  following any
such sale or other transfer, by a Holder of the number of shares of Common Stock
of the Company  obtainable  upon exercise of this Warrant  immediately  prior to
such event;  and if any  reclassification  also results in a change in shares of
Common Stock covered by Sections 6.1.1 or 6.1.2,  then such adjustment  shall be
made  pursuant to Sections  6.1.1,  6.1.2,  6.1.3 and this  Section  6.1.4.  The
provisions   of  this  Section  6.1.4  shall   similarly   apply  to  successive
reclassifications,  reorganizations,  mergers or consolidations,  sales or other
transfers.

     (e)  Changes in Form of Warrant.  This form of Warrant  need not be changed
because of any change  pursuant to this Section,  and Warrants issued after such
change may state the same Exercise Price and the same number of shares of Common
Stock and Warrants as are stated in the Warrants  initially  issued  pursuant to
this  Agreement.  The  acceptance  by any Holder of the issuance of new Warrants
reflecting  a required  or  permissive  change  shall not be deemed to waive any
rights to a prior adjustment or the computation thereof.

         2.  Elimination  of  Fractional  Interests.  The  Company  shall not be
required to issue certificates  representing fractions of shares of Common Stock
upon the  exercise of this  Warrant,  nor shall it be required to issue scrip or
pay cash in lieu of any fractional interests, it being the intent of the parties
that all fractional interests shall be eliminated by rounding any fraction up to
the  nearest  whole  number  of  shares  of  Common  Stock or other  securities,
properties or rights.

VII.  Reservation  and Listing.  The Company shall at all times reserve and keep
available out of its authorized  shares of Common Stock,  solely for the purpose
of issuance upon exercise of this Warrant, such number of shares of Common Stock
or other securities, properties or rights as shall be issuable upon the exercise
thereof.  The Company  covenants and agrees that,  upon exercise of the Warrants
and payment of the Exercise Price therefor, all shares of Common Stock and other
securities  issuable upon such exercise shall be duly and validly issued,  fully
paid and non-assessable and not subject to preemptive rights of any stockholder.
As long as the Warrants  shall be  outstanding,  the Company  shall use its best
efforts  to cause all  shares of Common  Stock  issuable  upon  exercise  of the
Warrants to be listed (subject to official notice of issuance) on all securities
exchanges (or, if applicable on Nasdaq) on which the Common Stock is then listed
and/or quoted.

VIII.    Certain Notice Requirements.

         1. Holder's Right to Receive Notice.  Nothing herein shall be construed
as conferring upon the Holders the right to vote or consent or to receive notice
as a stockholder for the election of directors or any other matter, or as having
any rights whatsoever as a stockholder of the Company.  If, however, at any time
prior to the  expiration of the Warrants and their  exercise,  any of the events
described in Section 8.2 shall occur,  then, in one or more of said events,  the
Company  shall give written  notice of such event at least fifteen days prior to
the date fixed as a record  date or the date of closing the  transfer  books for
the determination of the stockholders  entitled to such dividend,  distribution,
conversion or exchange of securities or subscription rights, or entitled to vote
on such proposed dissolution, liquidation, winding up or sale. Such notice shall
specify  such record date or the date of the closing of the transfer  books,  as
the case may be.




                                        6

<PAGE>



         2. Events Requiring  Notice.  The Company shall be required to give the
notice described in this Section 8 upon one or more of the following events: (i)
if the Company  shall take a record of the holders of its shares of Common Stock
for the purpose of entitling them to receive a dividend or distribution  payable
otherwise  than in cash, or a cash dividend or  distribution  payable  otherwise
than out of retained earnings,  as indicated by the accounting treatment of such
dividend or distribution on the books of the Company,  or (ii) the Company shall
offer to all the holders of its Common  Stock any  additional  shares of capital
stock of the Company or securities  convertible  into or exchangeable for shares
of capital  stock of the Company,  or any option,  right or warrant to subscribe
therefor,  or (iii) a merger or  reorganization  in which the Company is not the
surviving party, or (iv) a dissolution, liquidation or winding up of the Company
(other than in connection  with a  consolidation  or merger) or a sale of all or
substantially all of its property, assets and business shall be proposed.

         3. Notice of Change in Exercise  Price.  The  Company  shall,  promptly
after an event  requiring a change in the Exercise  Price  pursuant to Section 6
hereof,  send notice to the Holders of such event and change  ("Price  Notice").
The Price Notice shall  describe the event  causing the change and the method of
calculating  same and  shall be  certified  as being  true and  accurate  by the
Company's President and Chief Financial Officer.

         4. Transmittal of Notices.  All notices,  requests,  consents and other
communications  under this  Warrant  shall be in writing  and shall be deemed to
have been duly made on the date of delivery if delivered  personally  or sent by
overnight courier,  with  acknowledgment of receipt by the party to which notice
is  given,  or on the fifth  day  after  mailing  if mailed to the party to whom
notice  is  to be  given,  by  registered  or  certified  mail,  return  receipt
requested,  postage  prepaid and properly  addressed  as follows:  (i) if to the
registered Holder of this Warrant, to the address of such Holder as shown on the
books of the Company,  or (ii) if to the  Company,  to its  principal  executive
office.

IX.      Miscellaneous.

     1.  Headings.  The  headings  contained  herein are for the sole purpose of
convenience  of reference,  and shall not in any way limit or affect the meaning
or interpretation of any of the terms or provisions of this Warrant.

     2. Entire  Agreement.  This Warrant (together with the other agreements and
documents  being  delivered  pursuant  to or in  connection  with this  Warrant)
constitutes  the entire  agreement  of the parties  hereto  with  respect to the
subject matter hereof, and supersedes all prior agreements and understandings of
the parties, oral and written, with respect to the subject matter hereof.

     3. Binding  Effect.  This Warrant  shall inure solely to the benefit of and
shall  be  binding  upon,  the  Holder  and the  Company  and  their  respective
successors, legal representatives and assigns, and no other person shall have or
be construed to have any legal or equitable  right,  remedy or claim under or in
respect of or by virtue of this Warrant or any provisions herein contained.

     4.  Governing  Law;  Submission  to  Jurisdiction.  This  Warrant  shall be
governed by and construed  and enforced in accordance  with the law of the State
of New York,  without  giving  effect to  conflict of laws.  The Company  hereby
agrees  that any  action,  proceeding  or claim  against it  arising  out of, or
relating in any way to this Warrant  shall be brought and enforced in the courts
of the State of New York or of the  United  States of America  for the  Southern
District



                                        7

<PAGE>



of New York, and irrevocably  submits to such  jurisdiction,  which jurisdiction
shall be exclusive.  The Company  hereby waives any objection to such  exclusive
jurisdiction and that such courts  represent an inconvenient  forum. Any process
or summons to be served upon the Company  may be served by  transmitting  a copy
thereof by registered  or certified  mail,  return  receipt  requested,  postage
prepaid,  addressed  to it at the  address  set forth in Section 8 hereof.  Such
mailing shall be deemed personal service and shall be legal and binding upon the
Company  in any  action,  proceeding  or  claim.  The  Company  agrees  that the
prevailing  party(ies)  in any such action shall be entitled to recover from the
other party(ies) all of its reasonable  attorneys' fees and expenses relating to
such action or proceeding  and/or  incurred in connection  with the  preparation
therefor.

     5.  Waiver,  Etc.  The  failure of the Company or the Holder to at any time
enforce any of the  provisions  of this Warrant shall not be deemed or construed
to be a waiver of any such  provision,  nor to in any way affect the validity of
this Warrant or any  provision  hereof or the right of the Company or any Holder
to thereafter enforce each and every provision of this Warrant. No waiver of any
breach,  non-compliance  or  non-fulfillment  of any of the  provisions  of this
Warrant shall be effective unless set forth in a written instrument  executed by
the party or parties against whom or which enforcement of such waiver is sought;
and no waiver of any such breach,  non-compliance  or  non-fulfillment  shall be
construed  or  deemed  to  be a  waiver  of  any  other  or  subsequent  breach,
non-compliance or non-fulfillment.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by
its duly authorized officer as of the 7th day of December, 1996.

                                               H.E.R.C. PRODUCTS INCORPORATED


                                                 By:      /s/ Gary S. Glatter
                                                      -------------------------
                                                       Name: Gary S. Glatter
                                                       Title:    President




                                        8

<PAGE>



Form to be used to exercise Warrant:

H.E.R.C. Products Incorporated
2202 West Lone Cactus Drive, #15
Phoenix, Arizona 85027



Date:  _____________________, 19___

                  The  undersigned  hereby  elects  irrevocably  to exercise the
within  Warrant  and to  purchase  ________  shares of Common  Stock of H.E.R.C.
Products  Incorporated and hereby makes payment of $____________ (at the rate of
$_________  per share of Common Stock) in payment of the Exercise Price pursuant
thereto.  Please issue the Common Stock as to which this Warrant is exercised in
accordance with the instructions given below.

                                       or

                  The undersigned hereby elects irrevocably to convert its right
to purchase  ____________  shares of Common Stock  purchasable  under the within
Warrant into __________ shares of Common Stock of H.E.R.C. Products Incorporated
(based on a "Market Price" of $________ per share of Common Stock). Please issue
the Common Stock in accordance with the instructions given below.


                                    --------------------------------------
                                    Signature


- ---------------------------
Signature Guaranteed

                  NOTICE:  The signature to this form must  correspond  with the
name as written upon the face of the within Warrant in every particular  without
alteration or enlargement or any change whatsoever,  and must be guaranteed by a
bank,  other than a savings  bank,  or by a trust  company  or by a firm  having
membership on a registered national securities exchange.

                   INSTRUCTIONS FOR REGISTRATION OF SECURITIES


Name              ________________________________________________________
                            (Print in Block Letters)


Address           ________________________________________________________
Form to be used to assign Warrant:



                                        9

<PAGE>



                                   ASSIGNMENT


                  (To be executed by the registered  Holder to effect a transfer
                   of the within Warrant):

                  FOR  VALUE  RECEIVED,   ________________________________  does
hereby sell,  assign and  transfer  unto  _________________________________  the
right to  purchase  _____________________  shares  of Common  Stock of  H.E.R.C.
Products  Incorporated  ("Company")  evidenced  by the within  Warrant  and does
hereby authorize the Company to transfer such right on the books of the Company.


Dated:____________________, 19___



                                    --------------------------------------
                                    Signature






                  NOTICE:  The signature to this form must  correspond  with the
name as written upon the face of the within Warrant in every particular  without
alteration or enlargement or any change whatsoever.



                                       10
<PAGE>




                                                                  EXHIBIT 4.3
                         H.E.R.C. PRODUCTS INCORPORATED

                                AGENCY AGREEMENT


                                                     As of November 15, 1996



Perrin, Holden & Davenport Capital Corp.
17 John Street
3rd Floor
New York, New York 10038

Gentlemen:

         H.E.R.C.  Products  Incorporated,  a Delaware corporation  ("Company"),
proposes to offer for sale in a private placement ("Offering"), up to $1,500,000
in  aggregate  purchase  price of  shares  of  preferred  stock,  $.01 par value
("Preferred  Stock"), as more fully described in the Certificate of Designations
attached hereto as Exhibit A. The per-share offering price ("Offering Price") to
purchasers  ("Subscribers")  will be $10.00 and the stated  value will be $10.00
per share.

         The  Offering  will be made on a  "best  efforts,  minimum  $1,000,000,
maximum  $1,500,000 basis." The Preferred Stock will be sold only to "accredited
investors" in accordance  with Section 4(2) and/or 3(b) of the Securities Act of
1933, as amended ("Securities Act"), and Rules 501-506 of Regulation D ("Reg D")
promulgated thereunder.

         The  Subscribers  shall have the rights and be subject to the terms and
conditions  reflected  in the  subscription  agreement  to be  executed  by each
Subscriber  and  the  Company  (collectively,  the  "Subscription  Agreements"),
together with the exhibits thereto,  including, but not limited to the Company's
Annual  Report on Form 10-KSB for the fiscal year ended  December 31, 1995,  and
the  Company's  Quarterly  Report on Form  10-QSB for the fiscal  quarter  ended
September 30, 1996, and the Company's Proxy  Statement,  dated January 11, 1996,
and the Company's Prospectus, dated June 12, 1996, all of which together will be
referred  to herein as the  "Offering  Documents."  Perrin,  Holden &  Davenport
Capital Corp.  is sometimes  referred to herein as the  "Placement  Agent" or as
"PHD."

     6. Appointment of Placement Agent; The Offering.

     (a)  Appointment of Placement  Agent.  You are hereby  appointed  exclusive
Placement  Agent of the  Company  for the  purpose of  assisting  the Company in
finding qualified Subscribers. You hereby accept such agency and agree to assist
the  Company in finding  qualified  Subscribers.  You are hereby  authorized  to
engage, at your option, the services of other  broker-dealers who are members of
the National  Association of Securities Dealers,  Inc. ("NASD") to assist you in
soliciting  Subscribers and to remit to the  broker-dealers  all or a portion of
the commissions  payable to you under Section 4.3 hereof and the Placement Agent
Option issuable to you under Section 4.4 hereof, as you shall determine.




                                        1

<PAGE>



     (b) Offering  Period;  Closings.  The offering period  ("Offering  Period")
shall  commence on November 15, 1996 and shall  continue until November 30, 1996
("Termination  Date"), unless extended by the Company and the Placement Agent to
a date not later than December 15, 1996,  without notice to  Subscribers.  If at
any time prior to the Termination Date, subscriptions for at least $1,000,000 in
aggregate  purchase  price for the shares of Preferred  Stock have been received
and accepted (and funds in payment have cleared),  then, upon the mutual consent
of the Company and the Placement Agent, a closing ("Initial Closing") shall take
place with respect to such accepted subscriptions and the Company shall continue
the Offering  until all the  Preferred  Stock is sold or the end of the Offering
Period,  whichever occurs first. After the Initial Closing,  subsequent closings
of Preferred Stock with respect to accepted  subscriptions may take place at any
time during the Offering  Period as mutually  determined  by the Company and the
Placement  Agent (the Initial  Closing and any  subsequent  closing will each be
referred to herein as a "Closing").  If subscriptions for at least $1,000,000 in
aggregate  purchase price for the shares of Preferred Stock are not received and
accepted (and funds in payment therefor  cleared) by the Termination  Date, then
the Offering will be terminated and all funds received from  Subscribers will be
returned, without interest and without any deduction.

     (c) Offering Documents. The Company will provide the Placement Agent with a
sufficient number of copies of the Offering  Documents for delivery to potential
Subscribers  and such other  information,  documents and  instruments  which the
Placement Agent deems  reasonably  necessary to act as placement agent hereunder
and to comply  with the rules,  regula  tions and  judicial  and  administrative
interpretations respecting compliance with applicable state and federal statutes
related to the Offering.

     (d)  Segregation of Funds.  Each  Subscriber for Preferred Stock shall wire
the purchase  price to a designated  account  maintained  by Attorneys  Graubard
Mollen & Miller.

     (e) No Firm Commitment.  The Company  understands and acknowledges that the
undertaking  by the Placement  Agent  pursuant to this  Agreement is not a "firm
commitment" offering and that the Placement Agent is not obligated in any way to
purchase or sell the Preferred Stock offered hereby.

     7.  Representations  and Warranties of the Company.  The Company represents
and  warrants  upon the  execution  of this  Agreement  and again at the Initial
Closing and any subsequent Closings as follows:

     (a)  Due  Incorporation  and  Qualification.  The  Company  has  been  duly
incorporated,  is validly existing and is in good standing under the laws of its
state of incorporation  and is duly qualified as a foreign  corporation  (except
where the failure to so qualify would not have a material  adverse effect on the
Company)  for  the  transaction  of  business  and is in good  standing  in each
jurisdiction  in which the ownership or leasing of its properties or the conduct
of its business requires such qualification.

     (b)  Authorized  Capital.  The Company is  authorized  to issue  40,000,000
shares of Common  Stock  and  1,000,000  shares  of  preferred  stock,  of which
6,356,487  shares of Common Stock and no shares of Preferred Stock are currently
issued and outstanding. All of the issued and outstanding shares of Common Stock
have  been  duly and  validly  authorized  and  issued  and are  fully  paid and
non-assessable.  The offers and sales of such outstanding shares of Common Stock
were at all relevant  times either  registered  under the Securities Act and the
applicable state securities or Blue Sky laws, or exempt from such registration.




                                        2

<PAGE>



     (c)  Financial  Statements;  No Material  Adverse  Changes.  The  financial
statements  of the Company  included in the  Offering  Documents  ("Financials")
fairly present the consolidated  financial position and results of operations of
the Company at the dates thereof and for the periods covered thereby, subject to
year-end  adjustments and normal recurring accruals.  Other than as set forth on
the  September  30, 1996 balance  sheet  contained in the  Financials  ("Balance
Sheet"),  the Company has no material  liabilities or  obligations,  contingent,
direct,  indirect or otherwise,  except those incurred in the ordinary course of
business since the date of the Balance Sheet.  Except as otherwise stated in the
Offering  Documents or incurred in the ordinary course of the Company's business
since  September  30,  1996,  there has not been any  change  in the  condition,
financial or otherwise,  of the Company which could materially  adversely affect
its ability to conduct its operations as described in the Offering Documents.

     (d) No Pending Actions. There are no actions, suits,  proceedings,  claims,
hearings,  any investigations or inquiries before or by any court,  governmental
authority, tribunal or instrumentality (or to the Company's knowledge, any state
of facts which would give rise thereto), pending or, to the Company's knowledge,
threatened against the Company or involving the properties of the Company, which
might  result  in any  material  adverse  change  in the  business,  properties,
financial  position  or results of  operations  of the  Company,  or which might
adversely affect the  transactions or other acts  contemplated by this Agreement
or the validity or enforceability of this Agreement.

     (e) Private Offering Exemption.  Assuming that (i) a proper Form D is filed
in  accordance  with  Rule 503 of Reg D, (ii) that the offer and the sale of the
Preferred Stock by the Placement Agent is made in compliance with Rule 502(c) of
Reg D and (iii) that the  representations of the Subscribers in the Subscription
Agreements  signed  by them  are  true  and  correct  (which  facts  will not be
independently  verified  by the  Company),  the sale of  Preferred  Stock in the
Offering  is  exempt  from  registration  under  the  Securities  Act  and is in
compliance with Reg D.

     (f) Due  Authorization;  Consents.  The Company  has full right,  power and
authority to enter into this  Agreement,  the  Subscription  Agreements  and the
Placement  Agent  Option (as  defined in Section  4.4) and to perform all of its
obligations  hereunder  and  thereunder.   This  Agreement  has  been,  and  the
Subscription  Agreements  and Placement  Agent Option will be, duly  authorized,
executed  and  delivered  by the  Company.  The  execution  and delivery of this
Agreement has been, and the Subscription  Agreements and Placement Agent Option,
when executed and  delivered  will have been,  duly  authorized by all necessary
corporate  action  and no further  corporate  action or  approval  is or will be
required  for  their  respective  execution,   delivery  and  performance.  This
Agreement  constitutes,  and the  Subscription  Agreements  and Placement  Agent
Option,  upon  execution  and  delivery  will  constitute,   valid  and  binding
obligations  of the Company,  enforceable  in accordance  with their  respective
terms (except (i) as the enforceability  thereof may be limited by bankruptcy or
other laws now or hereafter in effect relating to or affecting creditors' rights
generally, (ii) that the remedy of specific performance and injunctive and other
forms of  equitable  relief  may be  subject to  equitable  defenses  and to the
discretion  of the court before which any  proceedings  therefor may be brought,
and  (iii)  that the  enforceability  of the  indemnification  and  contribution
provisions of the respective  agreements may be limited by the federal and state
securities laws and public  policy),  and no consent,  approval,  authorization,
order of, or filing with, any court or governmental authority or any other third
party is required to consummate the transactions contemplated by this Agreement,
the Subscription Agreements or Placement Agent Option, except that the offer and
sale of the  Preferred  Stock in  certain  jurisdictions  may be  subject to the
provisions  of  the   securities  or  Blue  Sky  laws  of  such   jurisdictions.
Additionally, other than such consents as may have already been



                                        3

<PAGE>



obtained, no consent, approval, authorization,  order of, filing with, any court
or governmental authority or any other third party is required to consummate the
transactions contemplated by this Agreement, the Subscription Agreements and the
Placement Agent Option.

     (g)  Non-Contravention.  The  Company's  execution  and  delivery  of  this
Agreement,  the Subscription  Agreements and the Placement Agent Option, and the
incurring of the obligations  herein and therein set forth, and the consummation
of the transactions contemplated herein and therein, will not (i) conflict with,
or constitute a breach of, or a default under,  the Certificate of Incorporation
or  By-Laws  of the  Company,  or any  contract,  lease  or other  agreement  or
instrument  to  which  the  Company  is a party or in which  the  Company  has a
beneficial  interest  or by which  the  Company  is  bound,  except  where  such
breach(es) or default(s),  singly or in the aggregate, would not have a material
adverse effect on the Company;  (ii) violate any existing  applicable law, rule,
regulation,  judgment,  order or  decree  of any  governmental  agency or court,
domestic  or  foreign,  having  jurisdiction  over  the  Company  or  any of its
properties  or  business,  except  where  such  violation(s),  singly  or in the
aggregate,  would not have a material  adverse  effect on the Company;  or (iii)
have any material  adverse  effect on any approval  necessary for the Company to
own, lease or operate any of its properties or to conduct its business.

     (h) Valid  Issuances.  The  Preferred  Stock,  when issued and delivered in
accordance  with the terms of the Offering  Documents,  will be duly and validly
issued,  fully paid and  non-assessable.  The Placement Agent Option when issued
and  delivered in accordance  with the terms of this  Agreement or the Placement
Agent Option,  as the case may be, will be duly and validly  issued.  The Common
Stock  issuable  upon  conversion  of the  Preferred  Stock and  exercise of the
Placement Agent Option when issued and delivered in accordance with their terms,
will be duly and validly issued, fully paid and non-assessable.  The Company has
reserved for issuance a sufficient number of shares of Common Stock to be issued
upon  conversion  of the  Preferred  Stock and exercise of the  Placement  Agent
Option.

     (i)  Offering  Documents;  10b-5  Representation.  The  Offering  Documents
conform in all material  respects with the  requirements  of Section 4(2) and/or
3(b) of the Securities Act and Rules 501-506 of Reg D and with the  requirements
of all other  applicable  rules and  regulations  of the Securities and Exchange
Commission  (the   "Commission")   currently  in  effect  relating  to  "private
offerings." The Offering Documents, taken as a whole, do not con tain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated  therein or necessary  to make the  statements  therein,  in light of the
circumstances under which they were made, not misleading.

     (j)  Exchange  Act  Reports.  The  Company  is  subject  to  the  reporting
requirements  of the  Securities  Act and  Securities  Exchange Act of 1934,  as
amended ("Exchange Act") and has filed all reports and statements required under
the  Securities  Act and  Exchange  Act on a timely  basis,  and each report and
statement was true and complete in all material respects when filed.

     (k)  Subsidiaries.  Whenever  the context of this  Agreement  permits,  the
representations  and warranties made by the Company in this Agreement shall also
apply and be true with  respect to each  subsidiary  individually  and as to the
Company taken as a whole with all the  subsidiaries,  as if each  representation
and warranty  contained  herein made specific  reference to the subsidiary  each
time the term "Company" is used.




                                        4

<PAGE>



     8.  Representations  and Warranties of the Placement  Agent.  The Placement
Agent represents and warrants as follows:

     (a) Due Incorporation. The Placement Agent is duly incorporated and validly
existing and in good standing under the laws of its state of  incorporation  and
is duly qualified as a foreign  corporation  for the transaction of business and
is in good  standing in each  jurisdiction  where the failure to be so qualified
would not have a  materially  adverse  effect on the  business of the  Placement
Agent.

     (b)  Broker-Dealer  Registration.  The  Placement  Agent is registered as a
broker-dealer under Section 15 of the Exchange Act.

     (c) Good Standing.  The Placement Agent is a member in good standing of the
NASD.

     (d)  Sales  in  Certain  Jurisdictions.  Sales  of  Preferred  Stock by the
Placement Agent will be made only in such  jurisdictions  in which the Placement
Agent is a registered  broker-dealer or where an applicable  exemption from such
registration exists.

     (e)  Compliance  with  Laws.  Offers  and sales of  Preferred  Stock by the
Placement Agent will be made in compliance with the provisions of Rule 502(c) of
Reg D of the  Securities  Act,  and the  Placement  Agent  will  furnish to each
investor a copy of the Offering  Documents  prior to accepting  any payments for
the Preferred  Stock. The Placement Agent will offer the Preferred Stock only in
the jurisdictions  indicated in the Blue Sky Survey delivered by Graubard Mollen
& Miller ("GM&M") and in accordance with the limitations set forth therein.

     (f)  Disqualification  Provisions.  Neither  the  Placement  Agent  nor any
principal,  director,  officer  or  agent  thereof  is  subject  to  any  of the
disqualification  provisions  set  forth  in  Rules  262(b)  or  (c)  under  the
Securities Act or state law applicable to the transactions contemplated hereby.

     9. Closings.

     (a) Closings.  The Closings will take place at the offices of GM&M, located
at 600 Third Avenue,  New York,  New York.  At each  Closing,  the Company shall
deliver to the  Subscribers for the shares of Preferred Stock being purchased at
such Closing,  certificates  representing  the Preferred  Stock against  payment
therefor by wire transfer.

     (b) Deliveries at each Closing. At each Closing, and as a condition to each
Closing,  the Company  shall  deliver or cause to be delivered to the  Placement
Agent on behalf of the Placement Agent and the Subscribers:

     a.  Officers'  Certificate.  A  certificate  of the  Company,  signed by an
executive  officer thereof stating that (a) the  representations  and warranties
contained in Section 2 hereof are true and accurate in all material  respects at
each Closing,  with the same effect as though expressly made at each Closing and
(b) that all covenants  and  agreements to be complied with by the Company prior
to the Closing have been complied with;

     b.  Secretary's  Certificate.  A certificate of the Company,  signed by the
Secretary or Assistant  Secretary thereof,  certifying that the attached copy of
the Certificate of


                                        5

<PAGE>



Incorporation,  as amended by the  Certificate  of  Designations  related to the
Preferred Stock, is in full force and effect, and has not been amended.

     c. Certificates.  The certificates  representing the Preferred Stock in the
names  of  the   Subscribers   at  such  Closing  and,  at  the  last   Closing,
notwithstanding  the preamble to this Section 4.2, the Placement Agent Option in
such names as it designates.

     d. Other  Documents.  Such other  Closing  documents as shall be reasonably
requested by the Placement Agent.

     (c) Placement Agent's Fees and Expenses. At each Closing, the Company shall
pay to the Placement Agent a commission  equal to 10% of the aggregate  purchase
price of the Preferred Stock sold. On or before the Initial Closing, the Company
shall pay the legal fees and  disbursements of GM&M referred to in paragraph 5.2
below.  All the  foregoing  amounts are payable  directly to the parties who are
owed same by deduction from the aggregate pur chase price of the Preferred Stock
sold.

     (d) Issuance of Placement Agent Option. At the last Closing with respect to
the Offering,  the Company shall issue to the Placement  Agent or its designees,
five-year  options  ("Placement Agent Option") to purchase that number of shares
of Common Stock  equivalent to one share of Common Stock for every two shares of
Preferred  Stock sold to  subscribers  in the Offering,  at a purchase  price of
$3.00 per share of Common Stock, exercisable until the fifth anniversary date of
the Initial  Closing.  The  Placement  Agent Option shall  contain  registration
rights  with  respect  to the  shares  underlying  the  Placement  Agent  Option
identical to the registration rights granted to the Subscribers in the Offering.

     (e) GKN Securities Corp. Letter. At the first Closing,  with respect to the
Offering,  the Company will deliver to the Placement  Agent a letter pursuant to
which GKN Securities  Corp.  will waive its right of first refusal in respect of
the Offering and agreeing not to release certain officers and directors from the
lockup agreements given in connection with offering of securities by the Company
on April 3, 1996.

     10. Covenants. The Company covenants and agrees that:

     (a) Amendments to Offering Documents. Until the Offering has been completed
or terminated,  if there shall occur any event  relating to or affecting,  among
other things,  the Company or any affiliate,  or the proposed  operations of the
Company taken as a whole as described in the Offering Documents,  as a result of
which it is  necessary,  in the opinion of counsel for the Company,  to amend or
supplement the Offering  Documents in order that the Offering Documents will not
contain an untrue  statement of a material fact or omit to state a material fact
necessary  in  order  to  make  the  statements  therein,  in the  light  of the
circumstances  under which they were made,  not  misleading,  the Company  shall
immediately  prepare and furnish to the Placement  Agent a reasonable  number of
copies of an appropriate  amendment of or supplement to the Offering  Documents,
in form and substance satisfactory to the Placement Agent.

     (b) Expenses of Offering.  The Company shall be responsible  for, and shall
pay,  all fees,  disbursements  and  expenses  incurred in  connection  with the
Offering, including, but not limited to, the Company's legal (including the fees
and disbursements of GM&M) and accounting fees and  disbursements,  the costs of
preparing,  mailing and  delivering  the Offering  Documents and  amendments and
supplements thereto, this Agreement, the Subscription



                                        6

<PAGE>



Agreements  and the Placement  Agent Option and related  documents  (all in such
quantities  as the  Placement  Agent  may  reasonably  require),  preparing  and
printing   stock,   filing  fees,   costs  and  expenses   (including  fees  and
disbursements  of GM&M) incurred in qualifying the Offering under the "Blue Sky"
laws of the states  reasonably  specified  by the  Placement  Agent (which fees,
excluding disbursements, shall be $5,000).

     (c)  Further  Assurances.  The  Company  will take such  actions  as may be
reasonably  required or desirable to carry out the  provisions of this Agreement
and the transactions contemplated hereby.

     (d) Accuracy of Representations  and Warranties.  The Company hereby agrees
that,  prior to the Termination  Date, it will take no action,  and use its best
efforts to prevent the occurrence of any event, which could result in any of its
representations,  warranties or covenants  contained in this Agreement or any of
the Offering  Documents  not to be true and  correct,  or not to be performed as
contemplated,  at and as of the time  immediately  after the  occurrence of such
transaction or event.

     11. Registration Rights; Subscriber Lockup.

     (a) Registration Rights. As additional consideration for this Agreement and
the  transactions  contemplated  hereby,  the Company  agrees with the Placement
Agent and will agree with each  Subscriber,  as the case may be, to register for
resale under a Registration Statement ("Registration Statement") pursuant to the
Securities Act and the Blue Sky or state  securities  laws of states  reasonably
selected by the Placement Agent, the Common Stock into which the Preferred Stock
is convertible and the Common Stock  underlying the Placement Agent Option.  The
Company  agrees that the  Registration  Statement will be filed on or before the
one-month anniversary of the Initial Closing. The Company agrees to use its best
efforts to have the Registration  Statement  declared  effective by February 14,
1997. If the  Registration  Statement is not declared  effective by the close of
business on April 15, 1997, as provided in the Certificate of  Designations  for
the Preferred Stock, the conversion rate will be lowered. The Company shall keep
the  Registration  Statement  effective  and  current  until all the  securities
registered  thereunder  are  sold or the  securities  may be sold by the  holder
pursuant to Rule 144, subject to customary "blackout" periods referred to in the
Placement Agent Option and the  Subscription  Agreement.  The Company shall bear
all the  expenses  and  pay  all the  fees it  incurs  in  connection  with  the
preparation, filing and modification or amendment of the Registration Statement.

     12. Indemnification and Contribution.

     (a)  Indemnification  by the Company.  The Company  agrees to indemnify and
hold  harmless the  Placement  Agent and each  person,  if any, who controls the
Placement Agent within the meaning of the Securities Act and/or the Exchange Act
against any losses, claims,  damages or liabilities,  joint or several, to which
the Placement Agent or such  controlling  person may become  subject,  under the
Securities  Act or  otherwise,  insofar  as  such  losses,  claims,  damages  or
liabilities  (or actions in respect  thereof) arise out of or are based upon (i)
any untrue  statement or alleged  untrue  statement of a material fact contained
(A) in the  Offering  Documents,  or (B) in any  blue sky  application  or other
document  executed by the Company  specifically  for blue sky  purposes or based
upon any other written information  furnished by the Company or on its behalf to
any state or other  jurisdiction in order to qualify any or all of the Preferred
Stock under the  securities  laws  thereof  (any such  application,  document or
information  being  hereinafter  called  a "Blue  Sky  Application");  (ii)  the
omission or alleged  omission by the Company to state in the Offering  Documents
or in any Blue Sky Application a material fact required to be



                                        7

<PAGE>



stated  therein or necessary  to make the  statements  therein,  in light of the
circumstances under which they were made, not misleading; or (iii) any breach by
the Company of any of its  representations,  warranties  or covenants  contained
herein or in the  Subscription  Agreements  or  Placement  Agent Option and will
reimburse the Placement Agent and each such controlling  person for any legal or
other expenses  reasonably  incurred by the Placement Agent or such  controlling
person in  connection  with  investigating  or defending  any such loss,  claim,
damage,  liability or action;  provided,  however,  that the Company will not be
liable in any such  case to the  extent  that any such  loss,  claim,  damage or
liability  arises  out of or is based  solely  upon (a) an untrue  statement  or
alleged untrue  statement or omission or alleged  omission made in reliance upon
and in conformity with written  information  regarding the Placement Agent which
is furnished to the Company by the Placement Agent specifically for inclusion in
the Offering  Documents or any such Blue Sky  Application;  or (b) any breach by
the Placement Agent of its  representations,  warranties or covenants  contained
herein  (collectively,  (a) and (b) above are referred to as the  "Non-Indemnity
Events").

     (b)  Indemnification  by the Placement Agent. The Placement Agent agrees to
indemnify  and hold  harmless the Company and each person,  if any, who controls
the Company  within the meaning of the  Securities  Act and/or the  Exchange Act
against any losses, claims,  damages or liabilities,  joint or several, to which
the Company or such controlling person may become subject,  under the Securities
Act or otherwise  insofar as such losses,  claims,  damages or  liabilities  (or
actions in  respect  thereof)  arise out of or are based upon any  Non-Indemnity
Event; and will reimburse the Company for any legal or other expenses reasonably
incurred by the Company in connection with  investigating  or defending any such
loss, claim, damage,  liability or action provided that such loss, claim, damage
or  liability  is  found  ultimately  to  arise  out  of or be  based  upon  any
Non-Indemnity Event.

     (c) Procedure.  Promptly  after receipt by an indemnified  party under this
Section 7 of notice of the commencement of any action,  such  indemnified  party
will, if a claim in respect thereof is to be made against any indemnifying party
under  this  Section  7,  notify  in  writing  the  indemnifying  party  of  the
commencement  thereof; and the omission so to notify the indemnifying party will
relieve the indemnifying party from any liability under this Section 7 as to the
particular item for which  indemnification is then being sought (if such failure
materially  prejudices the indemnifying party), but not from any other liability
which it may have to any  indemnified  party. In case any such action is brought
against any  indemnified  party,  and it notifies an  indemnifying  party of the
commencement  thereof,  the  indemnifying  party will be entitled to participate
therein, and to the extent that it may wish, jointly with any other indemnifying
party, similarly notified, to assume the defense thereof, with counsel who shall
be to the reasonable  satisfaction of such  indemnified  party, and after notice
from the  indemnifying  party to such  indemnified  party of its  election so to
assume the defense thereof,  the  indemnifying  party will not be liable to such
indemnified  party  under  this  Section  7 for  any  legal  or  other  expenses
subsequently  incurred by such indemnified  party in connection with the defense
thereof other than  reasonable  costs of  investigation.  Any such  indemnifying
party  shall not be  liable  to any such  indemnified  party on  account  of any
settlement  of any  claim  or  action  effected  without  the  consent  of  such
indemnifying party, which consent shall not be unreasonably withheld.

     (d) Contribution.  If the indemnification provided for in this Section 7 is
unavailable to any indemnified party in respect to any losses, claims,  damages,
liabilities or expenses  referred to therein,  then the  indemnifying  party, in
lieu of indemnifying such indemnified  party, will contribute to the amount paid
or  payable  by such  indemnified  party,  as a result of such  losses,  claims,
damages,  liabilities  or expenses (i) in such  proportion as is  appropriate to
reflect the relative benefits received by the Company on the one hand, and the



                                        8

<PAGE>



Placement Agent on the other hand, from the Offering,  or (ii) if the allocation
provided  by clause  (i)  above is not  permitted  by  applicable  law,  in such
proportion as is appropriate to reflect not only the relative  benefits referred
to in clause (i) above,  but also the  relative  fault of the Company on the one
hand,  and of the  Placement  Agent on the other hand,  in  connection  with the
statements  or  omissions  which  resulted  in  such  losses,  claims,  damages,
liabilities or expenses as well as any other relevant equitable  considerations.
The relative benefits received by the Company on the one hand, and the Placement
Agent on the other  hand,  shall be deemed to be in the same  proportion  as the
total proceeds from the Offering (net of sales commissions, but before deducting
other expenses) received by the Company, bear to the commissions received by the
Placement  Agent.  The  relative  fault of the Company on the one hand,  and the
Placement  Agent on the other hand,  will be determined with reference to, among
other things,  whether the untrue or alleged untrue statement of a material fact
or the omission to state a material fact relates to information  supplied by the
Company,  and  its  relative  intent,  knowledge,   access  to  information  and
opportunity to correct or prevent such statement or omission.

     (e) Equitable  Considerations.  The Company and the  Placement  Agent agree
that it would not be just and equitable if contribution pursuant to this Section
7 were  determined  by pro rata  allocation or by any other method of allocation
which does not take into account the equitable considerations referred to in the
immediately preceding paragraph.

     (f) Attorneys'  Fees. The amount payable by a party under this Section 7 as
a result of the losses,  claims,  damages,  liabilities or expenses  referred to
above will be deemed to include any legal or other fees or  expenses  reasonably
incurred by such party in connection with  investigating or defending any action
or claim  (including,  without  limitation,  fees and  disbursements  of counsel
incurred  by an  indemnified  party in any  action  or  proceeding  between  the
indemnifying  party and indemnified  party or between the indemnified  party and
any third party or otherwise).

     13.  Termination of Agreement.  The Placement  Agent will have the right to
terminate this Agreement by giving written notice, as herein  specified,  at any
time,  at or prior to the  Closing  if: (i)  material  information  comes to the
attention of the Placement Agent relating to the Company,  its management or its
position in the  industry  which would  preclude a successful  Offering;  (ii) a
material  adverse  change has occurred in the financial  condition,  business or
prospects of the Company (it being  understood that losses not  significantly in
excess of losses for prior  periods  shall not be deemed to be material  adverse
changes); or (iii) the Company has breached any of its material representations,
warranties or obligations hereunder, or failed to expeditiously proceed with the
Offering.  Notwithstanding  anything  contained  herein  to the  contrary,  if a
Closing does not occur by December  15,  1996,  through no fault of the Company,
the Company may terminate this Agreement. The provisions of Sections 7, 8 and 18
of this  Agreement  shall  survive the  termination  of this  Agreement  for any
reason.

     14.  Notices.  Any  notice  hereunder  shall  be in  writing  and  shall be
effective  when delivered in person or by facsimile  transmission,  or mailed by
certified mail, postage prepaid,  return receipt  requested,  to the appropriate
party or parties,  at the following  addresses:  if to the Placement  Agent,  to
Perrin,  Holden & Davenport Capital Corp., 17 John Street,  3rd Floor, New York,
New York 10038, Attention: Jody Eisenman,  President (Fax No. 212/566-4977);  if
to the Company, to H.E.R.C. Products Incorporated,  2202 West Lone Cactus Drive,
#15,  Phoenix,  Arizona 85027,  Attention:  Gary S. Glatter,  President (Fax No.
602/233-1107);  and, in either  case,  a copy to Graubard  Mollen & Miller,  600
Third Avenue, New York, New York 10016, Attention:  David Alan Miller, Esq. (Fax
No.  212/687-6989);  or, in each case,  to such other address as the parties may
hereinafter designated by like notice.



                                        9

<PAGE>



     15.  Parties.  This  Agreement  will inure to the benefit of and be binding
upon the parties hereto and their  respective  successors  and assigns.  Neither
party may assign this Agreement or its obligations  hereunder  without the prior
written consent of the other party. This Agreement is intended to be, and is for
the sole and exclusive  benefit of the parties hereto and the persons  described
in Section 7.1 and 7.2 hereof, and their respective  successors and assigns, and
for the benefit of no other  person,  and no other person will have any legal or
equitable right, remedy or claim under, or in respect of this Agreement.

     16. Amendment and/or Modification.  Neither this Agreement, nor any term or
provision  hereof,  may be changed,  waived,  discharged,  amended,  modified or
terminated  orally,  or in any  manner  other than by an  instrument  in writing
signed by each of the parties hereto.

     17. Further  Assurances.  Each party to this Agreement will perform any and
all acts and execute any and all  documents as may be necessary and proper under
the  circumstances  in order to  accomplish  the  intents  and  purposes of this
Agreement and to carry out its provisions.

     18.  Validity.  In case any term of this  Agreement  will be held  invalid,
illegal or unenforceable,  in whole or in part, the validity of any of the other
terms of this Agreement will not in any way be affected thereby.

     19. Waiver of Breach. The failure of any party hereto to insist upon strict
performance  of any of the  covenants and  agreements  herein  contained,  or to
exercise any option or right herein conferred in any one or more instances, will
not be construed to be a waiver or  relinquishment  of any such option or right,
or of any other covenants or agreements, and the same will be and remain in full
force and effect.

     20. Entire  Agreement.  This  Agreement  contains the entire  agreement and
understanding  of the  parties  with  respect to the subject  matter  hereof and
thereof, respectively, and there are no representations,  inducements,  promises
or agreements,  oral or otherwise,  not embodied in this Agreement.  Any and all
prior discussions,  negotiations,  commitments and understanding relating to the
subject matter of these agreements are superseded by them.

     21.  Counterparts.  This Agreement may be executed in counterparts and each
of such counterparts will for all purposes be deemed to be an original, and such
counterparts will together constitute one and the same instrument.

     22. Law. This  Agreement  will be deemed to have been made and delivered in
New York City and will be governed as to validity, interpretation, construction,
effect and in all other  respects by the internal laws of the State of New York.
The Company (i) agrees that any legal suit, action or proceeding  arising out of
or relating to this Agreement shall be instituted  exclusively in New York State
Supreme  Court,  County of New York, or in the United States  District Court for
the Southern District of New York, (ii) waives any objection to the venue of any
such  suit,  action  or  proceeding,  and  (iii)  irrevocably  consents  to  the
jurisdiction  of the New York State Supreme  Court,  County of New York, and the
United States  District Court for the Southern  District of New York in any such
suit, action or proceeding. The Company further agrees to accept and acknowledge
service of any and all process  which may be served in any such suit,  action or
proceeding  brought in the New York State Supreme Court,  County of New York, or
in the United States  District  Court for the Southern  District of New York and
agrees that service of process  upon it mailed by certified  mail to its address
shall be deemed in every  respect  effective  service of process  upon it in any
suit, action or proceeding.




                                       10

<PAGE>



     23.  Representations,  Warranties  and Covenants to Survive  Delivery.  The
respective representations,  indemnities,  agreements, covenants, warranties and
other statements of the Company and the Placement Agent shall survive  execution
of this Agreement and delivery of the Preferred  Stock and/or the termination of
this Agreement prior thereto.

         If you find the  foregoing  is in  accordance  with our  understanding,
kindly sign and return to us a counterpart  hereof,  whereupon  this  instrument
along with all counterparts will become a binding agreement between us.

                                                Very truly yours,

                                                H.E.R.C. PRODUCTS INCORPORATED


                                                  /s/ Gary S. Glatter
                                                -------------------------------
                                                Gary S. Glatter, President

AGREED:

PERRIN, HOLDEN & DAVENPORT
  CAPITAL CORP.


By:      /s/ Jody Eisenman
   ---------------------------
      Jody Eisenman, President



                                       11

<PAGE>



                         H.E.R.C. PRODUCTS INCORPORATED
                           2202 WEST LONE CACTUS DRIVE
                                    SUITE 15
                             PHOENIX, ARIZONA 85027



                                                              December 5, 1996



Perrin, Holden & Davenport Capital Corp.
17 John Street, 3rd Floor
New York, New York 10038

   Re:    Private Offering of Preferred Stock of H.E.R.C. Products Incorporated

Gentlemen:

                  Reference  is  made  to  the  Agency  Agreement,  dated  as of
November 15, 1996, between you and H.E.R.C.  Products Incorporated  ("Company"),
pursuant to which the Company proposed to offer for sale in a private  placement
("Offering"),  up to  $1,500,000  in  aggregate  purchase  price  of  shares  of
preferred stock, $.01 par value ("Preferred Stock") on a "best efforts,  minimum
$1,000,000,  maximum  $1,500,000  basis."  This is to confirm our  agreement  to
increase the Offering to up to $1,850,000 in aggregate  purchase price of shares
of Preferred Stock on a "best efforts,  minimum  $1,000,000,  maximum $1,850,000
basis."

                  If  you  find  the  foregoing  is  in   accordance   with  our
understanding, please execute a copy of this letter where indicated below.

                                                Sincerely,

                                                H.E.R.C. PRODUCTS INCORPORATED


                                                By:      /s/ Gary S. Glatter
                                                   ---------------------------
                                                    Gary S. Glatter, President

AGREED:

PERRIN, HOLDEN & DAVENPORT CAPITAL CORP.


By:      /s/ Jody Eisenman
   -----------------------------
      Jody Eisenman, President



                                       12
<PAGE>



                                                                  EXHIBIT 99.1
                         H.E.R.C. PRODUCTS INCORPORATED

                    CERTIFICATE OF DESIGNATIONS, PREFERENCES
                     AND OTHER RIGHTS AND QUALIFICATIONS OF
                             CLASS A PREFERRED STOCK
                       ----------------------------------

                         Pursuant to Section 151 of the
                        Delaware General Corporation Law
                       ----------------------------------


     H.E.R.C. PRODUCTS INCORPORATED,  a corporation organized and existing under
the Business Corporation Law of the State of Delaware ("Corporation") ,

         DOES HEREBY CERTIFY:

         FIRST:  That,  pursuant  to  authority  conferred  upon  the  Board  of
Directors  of  the   Corporation   ("Board")  by  the  amended   Certificate  of
Incorporation of said Corporation, and pursuant to the provisions of Section 151
of the Delaware General Corporation Law, said Board duly determined that 150,000
shares of Preferred Stock, $.01 par value per share,  shall be designated "Class
A Preferred Stock," and to that end the Board adopted a resolution providing for
the  designation,  preferences  and relative,  participating,  optional or other
rights,  and the  qualifications,  limitations and restrictions,  of the Class A
Preferred Stock, which resolution is as follows:

                  RESOLVED,  that the Board, pursuant to the authority vested in
         it by  the  provisions  of  the  Certificate  of  Incorporation  of the
         Corporation,  as amended, hereby creates a series of Preferred Stock of
         the corporation, par value $.01 per share, to be designated as "Class A
         Preferred Stock" and to consist of an aggregate of 150,000 shares.  The
         Class A Preferred Stock shall have such  designations,  preferences and
         relative,   participating,   optional   or   other   rights,   and  the
         qualifications, limitations and restrictions as follows:

     1.  Designations  and Amount.  150,000 shares of the Preferred Stock of the
Corporation,  par value $ .01 per share,  shall  constitute a class of Preferred
Stock designated as "Class A Preferred Stock" ("Class A Preferred  Stock").  The
Class A Preferred  Stock shall have a stated value of $10.00 per share  ("Stated
Value").

     2. Redemption  Rights.  The Class A Preferred Stock shall not be subject to
any right of redemption by the Corporation or by the holder thereof.

     3.  Dividends.  The holders of shares of Class A  Preferred  Stock shall be
entitled to receive  dividends  at the rate of 10% per annum of Stated Value (or
$1.00 per share) of the Class A Preferred Stock ("Preferred  Dividend") from the
date of issuance through the Conversion Date (as defined below),  payable solely
in shares of Common  Stock of the  Company  on the next  business  day after the
Conversion  Date,  such  number of shares of Common  Stock to be  calculated  in
accordance with paragraph 6(b) hereof.

     4. Rights on  Liquidation,  Dissolution or Winding Up, Etc. In the event of
any  voluntary  or  involuntary  liquidation,  dissolution  or winding up of the
Corporation,  as a result of which the assets of the  Corporation,  whether from
capital,  surplus or earnings,  shall be distributed to the  stockholders of the
Company, such assets shall be distributed  simultaneously to both the holders of
the Common Stock and the holders of the Class A Preferred Stock,



                                        1

<PAGE>



calculated as if the Class A Preferred Stock (together with Preferred  Dividends
through the record date for such  distribution) was fully converted  immediately
prior to such distribution.

     5.  Voting  Rights.  The  holders of Class A  Preferred  Stock shall not be
entitled to vote on any matter, except as may be required by law.

     6. Conversion of Class A Preferred Stock.

                  (a) The  holders  of Class A  Preferred  Stock  shall have the
right,  at such  holders'  option,  at any time or from time to time, to convert
each share of Class A  Preferred  Stock,  together  with the  accrued  Preferred
Dividends  thereon  through the  Conversion  Date,  into the number of shares of
Common Stock calculated in accordance with paragraph 6(b) below.

                  (b) The  number of shares  of Common  Stock to be issued  upon
conversion of the Class A Preferred Stock and payment of the Preferred  Dividend
will be determined  by dividing the Stated Value of the Class A Preferred  Stock
being  converted,  plus the Preferred  Dividends  thereon through the Conversion
Date, by the greater of (i) 75% of the average Closing Bid Price (as hereinafter
defined)  of the  Common  Stock for the five  consecutive  trading  days  ending
immediately prior to the date of the Written Notice (as hereinafter  defined) or
(ii) $.10.  Notwithstanding  the foregoing,  if the Common Stock issuable by the
Corporation  upon  conversion of the Class A Preferred  Stock and payment of the
Preferred Dividend is not registered with the Securities and Exchange Commission
for resale by the holder thereof on or before the close of business on April 15,
1997, the aforementioned rate of 75% shall be reduced to 72.5%. The "Closing Bid
Price" shall mean the closing bid price for the  Corporation's  Common Stock, as
reported by The Nasdaq  Stock Market if the Common Stock is quoted on the Nasdaq
National Market or Nasdaq SmallCap Market, or the last sales price of the Common
Stock if the Common Stock is listed on a national securities exchange, whichever
is the principal trading market for the Common Stock. If the Common Stock is not
listed on a national securities exchange or quoted on the Nasdaq National Market
or Nasdaq SmallCap Market,  but is traded in the  over-the-counter  market,  the
Closing  Bid Price shall mean the  closing  bid price for the Common  Stock,  as
reported  by  the  OTC  Bulletin  Board  or  the  National   Quotation   Bureau,
Incorporated,  or similar publisher of such quotations. If the Closing Bid Price
cannot be determined  pursuant to the above, the Closing Bid Price shall be such
price as the Board of Directors of the Company shall determine in good faith.

                  (c)  Before  any holder of Class A  Preferred  Stock  shall be
entitled to convert the same into shares of Common Stock, such holder shall give
written notice ("Written Notice") to the Corporation at its principal  corporate
office,  of the election to convert the same and shall state therein the name or
names in which the certificate or certificates for shares of Common Stock are to
be issued.  The Written  Notice must be delivered via  telecopier  prior to 3:00
p.m. EST on any day and shall be deemed to be received by the  Corporation  upon
receipt by it or by its  general  counsel.  The  Corporation  shall,  as soon as
practicable,  but not later than one business day thereafter,  issue and deliver
to a location in New York City  designated  by such  holder,  a  certificate  or
certificates for the number of shares of Common Stock to which such holder shall
be entitled as aforesaid.  Simultaneously with such delivery,  such holder shall
surrender the certificate or  certificates  for the Class A Preferred Stock duly
endorsed  for  transfer.  Such  conversion  shall be  deemed  to have  been made
immediately  prior to the close of business on the date which the Written Notice
is received by the Corporation in accordance herewith  ("Conversion  Date"), and
the person or persons  entitled to receive the shares of Common  Stock  issuable
upon such  conversion  shall be treated for all purposes as the record holder or
holders of such shares of Common Stock as of such Conversion Date.



                                        2

<PAGE>



                  (d) The  Corporation  shall not be required to issue fractions
of shares of Common  Stock upon  conversion  of the Class A  Preferred  Stock or
payment of the Preferred  Dividend.  If any fractions of a share would,  but for
this  Section,  be issuable upon any  conversion  of Class A Preferred  Stock or
payment of the Preferred  Stock,  in lieu of such  fractional  share the Company
shall round up or down to the nearest whole number of shares.

                  (e) The Corporation  shall reserve and shall at all times have
reserved out of its  authorized but unissued  shares of Common Stock  sufficient
shares of Common Stock to permit the conversion of the then  outstanding  shares
of the Class A Preferred Stock and payment of the Preferred Dividend pursuant to
this Section 6. All shares of Common  Stock which may be issued upon  conversion
of shares of the Class A Preferred  Stock and payment of the Preferred  Dividend
pursuant  to  this   Section  6  shall  be  validly   issued,   fully  paid  and
nonassessable.  In order that the  Corporation  may issue shares of Common Stock
upon  conversion  of shares of the Class A  Preferred  Stock and  payment of the
Preferred Dividend,  the Corporation will endeavor to comply with all applicable
Federal  and state  securities  laws and will  endeavor  to list such  shares of
Common Stock to be issued upon conversion on each  securities  exchange on which
Common Stock is listed and endeavor to maintain  such listing for such period of
time as either the Class A Preferred Stock or Common Stock underlying such Class
A Preferred Stock remains outstanding.

                  (f)  If  any  of  the   following   shall   occur:   (i)   any
reclassification  or change of outstanding  shares of Common Stock issuable upon
conversion of shares of the Class A Preferred  Stock (other than a change in par
value,  or from par value to no par value, or from no par value to par value, or
as a result of a  subdivision  or  combination),  or (ii) any  consolidation  or
merger  to which the  Corporation  is a party  other  than a merger in which the
Corporation  is the  continuing  corporation  and which  does not  result in any
reclassification  of, or change in,  outstanding shares of Common Stock, then in
addition  to all of the rights  granted to the  holders of the Class A Preferred
Stock as designated  herein,  the  Corporation,  or such successor or purchasing
corporation,  as the  case  may be,  shall,  as a  condition  precedent  to such
reclassification,  change, consolidation or merger ("Corporate Change"), provide
in its certificate of incorporation or other charter document that each share of
the Class A  Preferred  Stock shall be  convertible  into the kind and amount of
shares of capital  stock and other  securities  and  property  (including  cash)
receivable  upon such  Corporate  Change by a holder of the  number of shares of
Common Stock  deliverable upon conversion of such share of the Class A Preferred
Stock and the payment of the Preferred Dividend thereon immediately prior to the
Corporate  Change.  If, in the case of any such Corporate  Change,  the stock or
other securities and property (including cash) receivable  thereupon by a holder
of  Common  Stock  includes  shares of  capital  stock or other  securities  and
property of a corporation  other than the corporation  which is the successor of
the Corporation in such Corporate Change,  then the certificate of incorporation
or  other  charter  document  of  such  other  corporation  shall  contain  such
additional  provisions  to protect the interests of the holders of shares of the
Class A Preferred  Stock as the Board of  Directors  shall  reasonably  consider
necessary by reason of the  foregoing.  The provision of this Section 6(f) shall
similarly  apply to successive  reclassifications,  changes,  consolidations  or
mergers.

                  (g) If any Class A Preferred  Stock is issued and  outstanding
on November __, 1999,  such Class A Preferred  Stock and the Preferred  Dividend
thereon  shall,  without  any  action  on the  part of the  holder  thereof,  be
automatically converted into Common Stock on that date on the above terms.




                                        3

<PAGE>



                  (h) In the event any shares of Class A  Preferred  Stock shall
be converted pursuant to Section 6 hereof, the shares of Class A Preferred Stock
so converted shall be canceled.

                  (i) The Corporation  will not, by amendment of its Certificate
of   Incorporation   or  through   any   reorganization,   transfer  of  assets,
consolidation,  merger,  dissolution,  issue or sale of  securities or any other
voluntary action, avoid or seek to avoid the observance or performance of any of
the terms to be observed or performed hereunder by the Corporation,  but will at
all times in good faith assist in the carrying out of all the provisions of this
Section  6 and in the  taking  of  all  such  action  as  may  be  necessary  or
appropriate  in order to protect  the  conversion  rights of the  holders of the
Class A Preferred Stock against impairment.

         Such resolution was signed by the President and Assistant  Secretary of
the Corporation.

         IN WITNESS  WHEREOF,  we have executed this  Certificate of Designation
this 21st day of November, 1996.

                                               H.E.R.C. PRODUCTS INCORPORATED


                                      By:      /s/ Gary S. Glatter
                                         --------------------------------------
                                          Gary S. Glatter, President


                                      By:   /s/ Kristi A. Cordray
                                         --------------------------------------
                                         Kristi A. Cordray, Assistant Secretary



                                        4

<PAGE>



                         H.E.R.C. PRODUCTS INCORPORATED

                    CERTIFICATE OF DESIGNATIONS, PREFERENCES
                     AND OTHER RIGHTS AND QUALIFICATIONS OF
                             CLASS A PREFERRED STOCK
                       ----------------------------------

                         Pursuant to Section 151 of the
                        Delaware General Corporation Law
                       ----------------------------------



     H.E.R.C. PRODUCTS INCORPORATED,  a corporation organized and existing under
the General Corporation Law of the State of Delaware ("Corporation"),

         DOES HEREBY CERTIFY:

         FIRST:  That,  pursuant  to  authority  conferred  upon  the  Board  of
Directors  of  the   Corporation   ("Board")  by  the  amended   Certificate  of
Incorporation of said Corporation, and pursuant to the provisions of Section 151
of the Delaware  General  Corporation  Law, said Board duly  determined that the
number  of shares  of  Preferred  Stock,  $.01 par  value  per  share,  shall be
increased  from  150,000  shares to  185,000  shares,  and to that end the Board
adopted a resolution, which resolution is as follows:

                  RESOLVED,  that the Board, pursuant to the authority vested in
         it by  the  provisions  of  the  Certificate  of  Incorporation  of the
         Corporation, as amended, hereby increases the number of shares of Class
         A  Preferred  Stock of the  Corporation,  par  value  $.01  per  share,
         designated  as Class A Preferred  Stock from 150,000  shares to 185,000
         shares.

         Such resolution was signed by the President and Assistant  Secretary of
the Corporation.

         IN WITNESS  WHEREOF,  we have executed this  Certificate of Designation
this 6th day of December, 1996.

                                     H.E.R.C. PRODUCTS INCORPORATED


                                     By:      /s/ Gary S. Glatter
                                        ---------------------------------------
                                             Gary S. Glatter, President


                                     By:      /s/ Kristi A. Cordray
                                        ---------------------------------------
                                        Kristi A. Cordray, Assistant Secretary



                                        5

<PAGE>


                         H.E.R.C. PRODUCTS INCORPORATED

                    CERTIFICATE OF DESIGNATIONS, PREFERENCES
                     AND OTHER RIGHTS AND QUALIFICATIONS OF
                             CLASS A PREFERRED STOCK
                       ----------------------------------

                         Pursuant to Section 151 of the
                        Delaware General Corporation Law
                       ----------------------------------



     H.E.R.C. PRODUCTS INCORPORATED,  a corporation organized and existing under
the General Corporation Law of the State of Delaware ("Corporation"),

         DOES HEREBY CERTIFY:

         FIRST:  That,  pursuant  to  authority  conferred  upon  the  Board  of
Directors  of  the   Corporation   ("Board")  by  the  amended   Certificate  of
Incorporation of said Corporation, and pursuant to the provisions of Section 151
of the Delaware  General  Corporation  Law, said Board duly  determined that the
mandatory  conversion  date of the Class A Preferred  Stock,  $.01 par value per
share, specified in Section 6(g) of the Certificate of Designations, Preferences
and Other  Rights and  Qualifications  of the Class A  Preferred  Stock shall be
December  17,  1999,  and to that end the  Board  adopted  a  resolution,  which
resolution is as follows:

                  RESOLVED,  that the Board, pursuant to the authority vested in
         it by  the  provisions  of  the  Certificate  of  Incorporation  of the
         Corporation,   as  amended,   hereby   designates  that  the  mandatory
         conversion  date of the Class A  Preferred  Stock,  par value  $.01 per
         share,  specified in Section 6(g) of the  Certificate of  Designations,
         Preferences  and  Other  Rights  and  Qualifications  of  the  Class  A
         Preferred  Stock shall be the third  anniversary  of the Final  Closing
         Date.

         Such resolution was signed by the President and Assistant  Secretary of
the Corporation.

         IN WITNESS  WHEREOF,  we have executed this  Certificate of Designation
this 17th day of December, 1996.

                                               H.E.R.C. PRODUCTS INCORPORATED


                                    By:      /s/ Gary S. Glatter
                                       ----------------------------------------
                                            Gary S. Glatter, President


                                    By:      /s/ Kristi A. Cordray
                                       ----------------------------------------
                                        Kristi A. Cordray, Assistant Secretary



                                        6

<PAGE>


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