MFRI INC
S-3, 1997-02-18
INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFING EQUIP
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   AS  FILED  WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 18, 1997.
 REGISTRATION NO. 333-




                                       SECURITIES AND EXCHANGE COMMISSION
                                       WASHINGTON, D.C.  20549




                                  FORM S-3
                           REGISTRATION STATEMENT
                                    UNDER
                         THE SECURITIES ACT OF 1933




                                 MFRI, INC.
                       (Exact name of registrant as specified in its charter)


             DELAWARE                                              36-3922969
   (State or other jurisdiction                              (IRS Employer
  of incorporation or organization)                       Identification No.)



                                         7720 LEHIGH AVENUE
                                        NILES, ILLINOIS 60714
                                           (847) 966-1000
                         (Address, including ZIP code, and telephone number,
                  including  area  code,  of  registrant's  principal executive
 offices)

                                             DAVID UNGER
                                 CHAIRMAN OF THE BOARD OF DIRECTORS
                                             MFRI, INC.
                                         7720 LEHIGH AVENUE
                                        NILES, ILLINOIS 60714
                                           (847) 966-1000
                               (Name, address, including ZIP Code, and
                    telephone  number,  including  area  code,  of   agent  for
 service)




                                             COPIES TO:

                                         HAL M. BROWN, ESQ.
                                           RUDNICK & WOLFE
                                203 NORTH LASALLE STREET, SUITE 1800
                                      CHICAGO, ILLINOIS  60601
                                           (312) 368-4012
                                     (312) 236-7516(TELECOPIER)




                  APPROXIMATE  DATE  OF  COMMENCEMENT  OF PROPOSED SALE TO  THE
 PUBLIC:
             FROM TIME TO TIME AFTER THE EFFECTIVE DATE  OF  THIS  REGISTRATION
 STATEMENT.




   If  the  only  securities  being  registered  on this form are being offered
  pursuant  to  dividend  or  interest  reinvestment plans,  please  check  the
                      following box. <square>     
If any of the securities being registered on this form are being offered  on
 a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
  1933,  other  than  securities  offered  only  in connection with dividend or
     interest     reinvestment     plans,    check    the    following     box.
                        <square>X
   If this form is filed to register  additional  securities  for  an  offering
  pursuant  to Rule 462(b) under the Securities Act, please check the following
 box and list  the  Securities Act registration statement number of the earlier
    effective    registration     statement     for    the    same    offering.
                         <square>
   If this form is a post-effective amendment filed  pursuant  to  Rule  462(c)
 under the Securities Act, check the following box and list the Securities  Act
  registration statement number of the earlier effective registration statement
               for               the               same               offering.
                         <square>
   If delivery of  the  prospectus is expected to be made pursuant to Rule 434,
           please          check          the          following           box.
                         <square>



<TABLE>
<CAPTION>
                                                              AMOUNT TO             PROPOSED MAXIMUM          PROPOSED MAXIMUM
 CALCULATION OF                  TITLE OF SHARES            BE REGISTERED            AGGREGATE PRICE              AGGREGATE
 REGISTRATION FEE               TO BE REGISTERED                                       PER UNIT{(1)}           OFFERING PRICE
 <S>                       <C>                        <C>                       <C>                       <C>
         AMOUNT OF           Common Stock, par value          2,124,298                  $7.688                  $16,331,603
     REGISTRATION FEE            $.01 per share
 $4,949
</TABLE>

 (1) Estimated  solely  for  purposes  of  calculating  the registration fee in
   accordance with Rule 457(c) under the Securities Act of  1933,  based on the
   average of the high and low prices per share of the Common Stock reported by
   Nasdaq on February 12, 1997.




   THE  REGISTRANT  HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH  DATE  OR
 DATES AS MAY BE NECESSARY  TO  DELAY  ITS  EFFECTIVE DATE UNTIL THE REGISTRANT
  SHALL  FILE  A  FURTHER  AMENDMENT  WHICH  SPECIFICALLY   STATES   THAT  THIS
  REGISTRATION  STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE  WITH
 SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
 SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
 SECTION 8(A), MAY DETERMINE.



<PAGE>
 INFORMATION CONTAINED  HEREIN  IS  SUBJECT  TO COMPLETION OR AMENDMENT.  A
 REGISTRATION STATEMENT RELATING TO THESE SECURITIES  HAS  BEEN  FILED WITH
 THE SECURITIES AND EXCHANGE COMMISSION.  THESE SECURITIES MAY NOT  BE SOLD
  NOR  MAY  OFFERS  TO  BUY  BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION
 STATEMENT BECOMES EFFECTIVE.   THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN
  OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY NOR SHALL  THERE  BE
  ANY  SALE  OF  THESE  SECURITIES  IN  ANY  STATE  IN  WHICH  SUCH  OFFER,
  SOLICITATION   OR  SALE  WOULD  BE  UNLAWFUL  PRIOR  TO  REGISTRATION  OR
 QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.

          SUBJECT TO COMPLETION, DATED FEBRUARY 18, 1997

                            PROSPECTUS

                         2,124,298 Shares

                            [MFRI LOGO]

                           COMMON STOCK

     This Prospectus  relates to 2,124,298 outstanding shares ("Shares") of
 common stock, par value  $.01  per  share  (the  "Common Stock"), of MFRI,
  Inc.,  a  Delaware corporation (the "Company"), which  may  hereafter  be
 offered or sold  from  time to time for the account of persons named under
 the caption "Selling Stockholders."

     The Shares were issued in the merger (the "Merger") of Midwesco, Inc.,
 an Illinois corporation,  with  and  into  the  Company, which occurred on
 December 30, 1996.

     The Shares may hereafter be offered or sold from  time to time for the
 account of persons named under the caption "Selling Stockholders"  on  the
  Nasdaq  National  Market,  or  otherwise,  at  prices  and  on terms then
   obtainable,   in  broker's  transactions,  special  offerings,  exchange
 distributions, negotiated  transactions, block transactions, or otherwise.
 See "Selling Stockholders" and  "Plan  of Distribution."  The Company will
 not realize any proceeds from any sale of the Shares.

     SEE "RISK FACTORS" ON PAGE 2 FOR A DISCUSSION  OF CERTAIN FACTORS THAT
 SHOULD BE CONSIDERED BY PROSPECTIVE PURCHASERS OF THE COMMON STOCK OFFERED
 HEREBY.

     The  Common Stock is traded on the Nasdaq National  Market  under  the
 symbol MFRI.   On  February  12, 1997, the last reported sale price of the
 Common Stock on the Nasdaq National Market was $7.688.
                          ______________

 THESE SECURITIES HAVE NOT BEEN  APPROVED  OR DISAPPROVED BY THE SECURITIES
 AND EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION  NOR  HAS  THE
  COMMISSION PASSED OR ANY STATE SECURITIES COMMISSION UPON THE ACCURACY OR
 ADEQUACY  OF  THIS  PROSPECTUS.   ANY  REPRESENTATION TO THE CONTRARY IS A
 CRIMINAL OFFENSE.
                          ______________
                        FEBRUARY     , 1997
<PAGE>
     NO DEALER, BROKER OR OTHER PERSON HAS  BEEN  AUTHORIZED  TO  GIVE  ANY
  INFORMATION OR TO MAKE ANY REPRESENTATIONS, OTHER THAN THOSE CONTAINED IN
 THIS  PROSPECTUS,  IN  CONNECTION  WITH  THE OFFERING MADE HEREBY, AND, IF
 GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED ON AS
  HAVING  BEEN  AUTHORIZED  BY  THE  COMPANY.   THIS  PROSPECTUS  DOES  NOT
 CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF  ANY  OFFER  TO  BUY  THE
  SECURITIES  TO  WHICH  IT RELATES IN ANY JURISDICTION IN WHICH, OR TO ANY
 PERSON TO WHOM, IT IS UNLAWFUL TO MAKE SUCH AN OFFER OR SOLICITATION OF AN
 OFFER.  NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY OFFER OR SALE MADE
 HEREUNDER SHALL, UNDER ANY  CIRCUMSTANCES,  CREATE  ANY  IMPLICATION  THAT
  THERE  HAS  BEEN  NO CHANGE IN THE INFORMATION SET FORTH HEREIN OR IN THE
 AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.

     THIS  PROSPECTUS,   INCLUDING  DOCUMENTS  INCORPORATED  BY  REFERENCE,
 CONTAINS FORWARD-LOOKING  STATEMENTS  WITHIN THE MEANING OF SECTION 27A OF
 THE SECURITIES ACT AND SECTION 21E OF THE  EXCHANGE  ACT.  FORWARD-LOOKING
  STATEMENTS  ARE  INHERENTLY SUBJECT TO RISKS AND UNCERTAINTIES,  MANY  OF
 WHICH CANNOT BE PREDICTED  WITH  ACCURACY AND SOME OF WHICH MIGHT NOT EVEN
  BE  ANTICIPATED.   FUTURE  EVENTS  AND   ACTUAL  RESULTS,  FINANCIAL  AND
  OTHERWISE,  MAY  DIFFER  MATERIALLY  FROM THE RESULTS  DISCUSSED  IN  THE
 FORWARD-LOOKING STATEMENTS.  FACTORS THAT  MIGHT  CAUSE  SUCH A DIFFERENCE
 INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED IN "RISK  FACTORS" HEREIN
 AND IN "MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS  AND
  FINANCIAL  CONDITION"  INCORPORATED  BY REFERENCE IN THE COMPANY'S ANNUAL
 REPORT ON FORM 10-K FOR THE FISCAL YEAR  ENDED  JANUARY  31, 1996, AND THE
  COMPANY'S  QUARTERLY  REPORTS ON FORM 10-Q FOR THE FISCAL QUARTERS  ENDED
 APRIL 30, 1996, JULY 31, 1996 AND OCTOBER 31, 1996, WHICH ARE INCORPORATED
 BY REFERENCE IN THIS PROSPECTUS.


                         TABLE OF CONTENTS

                                                             PAGE

 Available Information .......................................  2
 Risk Factors ................................................  2
 The Company .................................................  3
 Selling Stockholders ........................................  5
 Use of Proceeds .............................................  6
 Plan of Distribution ........................................  6
 Legal Matters ...............................................  7
 Experts .....................................................  7
 Information Incorporated By Reference .......................  7


                       AVAILABLE INFORMATION

     The  Company is subject  to  the  informational  requirements  of  the
 Securities  Exchange  Act of 1934, as amended (the "Exchange Act"), and in
 accordance therewith, files  periodic  reports, proxy statements and other
   information   with   the   Securities  and  Exchange   Commission   (the
 "Commission").  Such reports,  proxy  statements and other information can
 be inspected and copied at the public reference  facilities  maintained by
  the  Commission  at  Room 1024, 450 Fifth Street, N.W., Washington,  D.C.
 20549, and should also  be  available  for  inspection  and copying at the
 regional offices of the Commission located at 75 Park Place,  14th  Floor,
 New York, New York 10007 and 500 West Madison Street, Suite 1400, Chicago,
  Illinois  60661.   Copies  of such material can also be obtained from the
 Public Reference Section of the  Commission  at  450  Fifth  Street, N.W.,
  Washington,  D.C. 20549 at prescribed rates.  The Commission maintains  a
 Web site that contains  reports,  proxy  and  information  statements, and
  other  information  about  the  Company.   The  address  of the Web  site
 maintained by the Commission is "http://www.sec.gov".

     This  Prospectus  constitutes  a  part of a registration statement  on
  Form  S-3  (herein,  together  with  all  amendments  and  exhibits,  the
 "Registration Statement") under the Securities  Act  of  1933,  as amended
  (the  "Securities Act"), filed by the Company.  This Prospectus does  not
 contain  all  of  the information set forth in the Registration Statement.
 For further information,  reference  is  hereby  made  to the Registration
  Statement,  including  the  financial  schedules  and exhibits  filed  or
 incorporated by reference as a part thereof, which may be -examined at the
  Public  Reference  Room  of the Commission in Washington,  D.C.,  without
 charge, or copies of which  may  be  obtained  from  the  Commission  upon
  payment  of  the prescribed fees.  Statements contained herein concerning
 the provisions  of  documents  filed  herewith as exhibits are necessarily
 summaries of such documents, and each such  statement  is qualified in its
  entirety by reference to the copy of the applicable document  filed  with
 the Commission.


                           RISK FACTORS

     COMPETITION; BUSINESS.  The businesses in which the Company is engaged
 are  highly  competitive.  In addition, new installations of baghouses are
 subject to competition  from  alternative  technologies  and  the  sale of
  specialty  piping  systems  and  electronic  leak  detection and location
  systems  are  subject  to  competition  from  alternative products.   The
  business  of  Thermal  Care is dependent on the plastics  industry.   Any
 adverse trends in the plastics industry may have a material adverse effect
 on the business of Thermal Care.  Thermal Care relies upon a single source
 for key components of several  of  its  products.   Although  the  Company
  believes  that there are alternate sources available for such components,
 there can be  no  assurance  that  the  interruption  of  supplies of such
 components would not have an adverse effect on the financial  condition of
 the Company, and that the Company, if required to do so, would  be able to
 negotiate agreements with alternative sources on acceptable terms.

     GOVERNMENT  REGULATION.   The  demand for the Company's leak detection
 and location systems and secondary containment  piping  systems  is driven
 primarily by government regulation with respect to hazardous waste.   Laws
  such  as the Federal Resource Conservation and Recovery Act ("RCRA"), and
 standards  such as the National Emission Standard for Hydrocarbon Airborne
 Particulates  ("NESHAP"), have increased the demand for the Company's leak
 detection and location  and  secondary  containment  piping  systems.  The
  Company's filtration products business to a large extent is dependent  on
 governmental  regulation of air pollution at the federal and state levels.
 The Company believes  that  continuing  growth  in  the sale of filtration
  products  and  services  will  be  materially  dependent  on   continuing
  enforcement  of  environmental  laws  such  as  the Federal Clean Air Act
 Amendments of 1990 ("Clean Air Act Amendments").  Although changes in such
 environmental regulations could significantly alter  the  demand  for  the
 Company's products and services, the Company does not believe that such  a
 change is likely to decrease demand in the foreseeable future.

     ECONOMIC  FACTORS.  Although demand for many of the Company's products
 is generally affected  by  its customers' need to comply with governmental
 regulations, purchases of the  Company's  products at times may be delayed
 by customers due to adverse economic factors.

     DIVIDENDS.  The Company has not paid dividends  in  the  past and does
  not  anticipate  paying  cash  dividends  on  its  common  stock  in  the
  foreseeable  future.   The  Company's  line  of credit agreement contains
  certain restrictions on payment of dividends.   The  primary  restriction
 limits dividends to a cumulative amount of up to 25% of net income.

     LACK   OF  ARM'S-LENGTH  NEGOTIATIONS;  CONFLICTS  OF  INTEREST.   The
 agreements between the Company and Midwesco relating to the Merger and the
 Perma-Pipe Transaction  were  not  negotiated  on  an  arm's-length basis.
   However,   the  Company  believes  the  consideration,  representations,
 warranties and  covenants  in such agreements are fair to the Company even
 though they may not provide  the  same  level  of  protection  as  similar
   representations,   warranties  and  covenants  contained  in  comparable
 agreements with persons  that  are not affiliates of the Company.  Members
  of  the  Board  of Directors affiliated  with  Midwesco  (Messrs.  Unger,
 Ogilvie, Elgendy,  Gruenberg  and  Henry  and Bradley Mautner) will have a
 conflict of interest with respect to their  obligations  as  directors and
  officers  of  the  Company,  and  enforcing  the terms of such agreements
 against Midwesco, if necessary.


                            THE COMPANY

     The Company is engaged in the manufacture and  sale of filter bags for
 use in industrial air pollution control systems known  as "baghouses", and
 also engineers, designs and manufactures specialty piping systems and leak
  detection  and location systems, and industrial water cooling  equipment.
 The Company,  which  was  incorporated in Delaware in October 1993, is the
  successor  corporation  to Midwesco  Filter  Resources,  Inc.  ("Midwesco
 Filter").

     Midwesco Filter was incorporated  in  Delaware  in  October  1989 as a
  wholly  owned  subsidiary  of  Midwesco.   On December 13, 1989, Midwesco
  Filter  exchanged  shares  of  its  common  stock  for   the  net  assets
 constituting its Midwesco Filter Resources division ("Filter Division") of
  Midwesco.   The  Filter  Division was formed from certain assets  of  the
 Filter Media division of the  Kennecott  Corporation, acquired by Midwesco
  in  June  1982, and certain assets of the Filter  Resources  Corporation,
 acquired by Midwesco in December 1983.

     On January  28,  1994  pursuant  to  a merger transaction ("Perma-Pipe
  Transaction")  between  the  Company, a subsidiary  of  the  Company  and
 Midwesco Filter, the Company acquired  the  Perma-Pipe  business  ("Perma-
  Pipe")  from  Midwesco  for  cash  and  278,666  shares  of Common Stock.
  Pursuant  to  the Perma-Pipe Transaction, each share of common  stock  of
 Midwesco Filter  was exchanged for one share of Common Stock.  Immediately
 prior to the effective  time  of  the  Perma-Pipe  Transaction,  a  public
 offering (the "Offering") of shares of common stock of Midwesco Filter was
  consummated,  the  net  proceeds  of  which  were used to repay bank debt
  related  to  Perma-Pipe.  Perma-Pipe is in the business  of  engineering,
 designing and manufacturing  specialty  piping  systems and leak detection
 and location systems.

     On  September  30,  1994,  the  Company  and an indirect  wholly-owned
 subsidiary of the Company, pursuant to a purchase  agreement  dated  as of
 such date ("Purchase Agreement"), acquired substantially all of the assets
  of  Ricwil  Piping Systems Limited Partnership ("Ricwil LP") for cash and
 55,710 shares of Common Stock, as adjusted in accordance with the terms of
 the Purchase Agreement.   Ricwil LP was a manufacturer of insulated piping
 systems for district heating and cooling systems.

     On December 6, 1995, Perma-Pipe  acquired  for cash the net assets and
 leak detection business of Hagenuk GmbH.

     On  August  15,  1996,  the  Company, pursuant to  an  Asset  Purchase
  Agreement  dated  as of such date (the  "Purchase  Agreement"),  acquired
 substantially all of  the  assets  of  Eurotech  Air  Filtration, Inc., an
  Oregon  corporation  ("Eurotech"), for cash and 30,571 shares  of  Common
 Stock, subject to possible adjustments in accordance with the terms of the
 Purchase Agreement.  Pursuant  to the Purchase Agreement, Eurotech has the
 right, subject to certain conditions,  to  distribute  such  shares to its
 four shareholders.

     On  December 30, 1996, the Company acquired the Thermal Care  Division
 ("Thermal  Care")  and  certain  other specified assets and liabilities of
 Midwesco by the merger of Midwesco  with  and  into  MFRI  (the "Merger").
 Through the Merger, an aggregate of 2,124,298 shares of Common  Stock were
 issued to the shareholders of Midwesco and the 1,717,666 shares of  Common
  Stock  owned  by  Midwesco  immediately  prior to the consummation of the
 Merger were cancelled.  Thermal Care engineers,  designs  and manufactures
 industrial water cooling equipment.

     The Company's filtration products business is carried on  by  Midwesco
  Filter,  and  the piping system products business is carried on by Perma-
  Pipe,  Inc.   Midwesco  Filter  and  Perma-Pipe,  Inc.  are  wholly-owned
 subsidiaries of  MFRI.   As  used  herein,  unless  the  context otherwise
  requires, the term Company includes MFRI, Inc., Midwesco Filter,  Thermal
 Care, Perma-Pipe, Inc., and its subsidiaries, and their predecessors.

     The  Company's  principal executive offices are located at 7720 Lehigh
 Avenue, Niles, Illinois  60714 and its telephone number is (847) 966-1000.
  Other  information  concerning   the   Company's   management,  business,
 securities, and results of operations is incorporated  by  reference  from
  its  reports filed with the Commission.  See "Information Incorporated by
 Reference."



                       SELLING STOCKHOLDERS

     The  Shares  may  be  offered from time to time for the account of the
 Selling Stockholders whose  names  are  set forth in the table below.  The
 table sets forth information as of January  31,  1997  with respect to the
  beneficial ownership of the Shares by the Selling Stockholders.   To  the
 knowledge  of  the  Company,  none  of  the  Selling  Stockholders has any
  material  relationship  with  the  Company  except  as set forth  in  the
 footnotes to the following table and as more fully described  elsewhere in
  this  Prospectus (including the information incorporated by reference  in
 this Prospectus).

<TABLE>
<CAPTION>
 SELLING STOCKHOLDER          NO. OF SHARES OWNED  NO. OF SHARES WHICH  NO. OF SHARES WHICH MAY
                             PRIOR TO Offering(1)    MAY BE Offered        BE OWNED AFTER
                                                                             Offering(1)
 <S>                         <C>                  <C>                  <C>
 Henry Mautner(2)                          451,688       419,938                 31,750
 Debra Mautner                             170,473       170,473                 --
 David M. Mautner                          171,298       170,473                  825
 Bradley E. Mautner(3)                     172,773       170,473                  2,300
 David Unger(4)                            535,677       489,927                 45,750
 Maxine S. Unger                            29,359               12,859     16,500
 Judith Golden                             141,632       141,632                 --
 Rebecca Fishman                           148,932       141,632                  7,300
 Michael Unger                             142,132       141,632                  500
 Robert F. Spreenberg                      187,925       187,925                 --
 David A. Miller                             6,611         5,511                  1,100
 William F. Davis                           27,126        25,901                1,225
 Judith & Jeff Golden                        4,374         3,674                  700
 Don L. Gruenberg(5)                         4,587         1,837                  2,750
 John F. Conroy(6)                           2,543           918                  1,625
 Carlo Ferraro                                 367           367                 --
 Edward A. Crylen                            3,062         1,837                  1,225
 Herbert J. Sturm(7)                         9,815         3,490                  6,325
 Robert K. Spreenberg                        9,552         9,552                 --
 Gene K. Ogilvie(8)                         43,772        11,022                 32,750
 Michael D. Bennett(9)                      10,331         3,306                  7,025
 Fati Elgendy(10)                           27,969         9,919                 18,050
</TABLE>



 (1) Includes  shares,  if  any, held by spouse; held as custodian; held in
     joint tenancy with spouse;  held  by  or  for the benefit of the named
     person or one or more members of his immediate family; with respect to
     which the named person has or shares voting  or  investment powers; or
     in which the named person otherwise has a beneficial  interest.   Also
     includes shares issuable upon exercise of employee stock options.
 (2) Henry  Mautner is Director and Vice Chairman of the Board of Directors
     of the Company.
 (3) Bradley E. Mautner is Director and Vice President of the Company.
 (4) David Unger is Director, Chairman of the Board of Directors, President
     and Chief Executive Officer of the Company.
 (5) Mr. Gruenberg is Director and Vice President of the Company.
 (6) Mr. Conroy is Comptroller and Assistant Secretary of the Company.
 (7) Mr. Sturm  is  Vice  President  of the Company and of Midwesco Filter,
     Inc.
 (8) Mr. Ogilvie is Director, Vice President  of  the Company and President
     of Midwesco Filter, Inc.
 (9) Mr. Bennett is Vice President, Secretary and Treasurer of the Company.
 (10) Mr. Elgendy is Director, Vice President of the  Company and President
     of Perma-Pipe, Inc.


                          USE OF PROCEEDS

     This Prospectus relates solely to Shares being offered  and sold
 for the accounts of the Selling Stockholders.  The Company will  not
  realize  any  proceeds  from  any  sale  of  Shares  by the Selling
 Stockholders.


                       PLAN OF DISTRIBUTION

     The Selling Stockholders may offer and sell Shares  by  means of
  the  Prospectus  from  time  to  time  in one or more transactions,
 directly by the Selling Stockholders, or  through agents, dealers or
 brokers to be designated from time to time;  such  offers  and sales
  may  be effected over any national securities exchange or automated
 interdealer quotation system on which shares of the Common Stock are
 then listed,  in negotiated transactions or in a combination of such
 methods of sale;  the  selling  price of the Shares may be at market
 prices prevailing at the time of  sale,  at  prices  related to such
 prevailing market prices or at negotiated prices; and the Shares may
   also   be   offered  in  coordinated  block  transactions  through
 underwriters, dealers  or  agents,  or  otherwise  who  may  receive
  compensation  in  the  form of underwriting or brokerage discounts,
 concessions or commissions  from  the  Selling  Stockholders  or the
  purchasers  of  such  Shares  for  whom they may act as agents.  In
 certain states, the Selling Stockholders  may  be  required to offer
 and sell Shares only through brokers and dealers registered  in such
 states.

     The Selling Stockholders and any brokers or dealers that act  in
  connection  with  the  sale of Shares hereunder may be deemed to be
 "underwriters" within the meaning of Section 2(11) of the Securities
 Act and any commissions received  by them and any profit on the sale
 of Shares as principal may be deemed  to  be  underwriting discounts
 and commissions under the Securities Act.

     The  Company  will pay all of the expenses of  the  preparation,
 printing and filing of the Registration Statement, any amendments or
 supplements thereto,  and  prospectuses  and revised prospectuses as
 required to cover the transactions covered  hereby,  as  well as the
  Company's  fees  and  disbursements  of its counsel and accountants
  relating to the Registration Statement,  but  the  Company  is  not
  obligated  to  pay  any  underwriting  discounts  and  commissions,
 brokers'  commissions or charges, the legal fees and expenses of the
 Selling Stockholders,  or  transfer  taxes,  if any, relating to the
 sale or disposition of Resale Shares by a Selling Shareholder.

     The Selling Stockholders may also resell Shares  in  open market
 transactions pursuant to the resale provisions of Rule 144 under the
  Securities  Act  or  in transactions otherwise permitted under  the
 Securities Act.


                           LEGAL MATTERS

     Certain legal matters  in  connection with the Shares, including
 the validity of the Shares, will  be  passed upon for the Company by
 Rudnick & Wolfe, Chicago, Illinois.


                              EXPERTS

     The  financial statements incorporated  in  this  Prospectus  by
 reference from the Company's Annual Report on Form 10-K for the year
 ended January  31,  1996 have been audited by Deloitte & Touche LLP,
  independent  auditors,   as   stated  in  their  report,  which  is
 incorporated herein by reference,  and  have been so incorporated in
 reliance upon the report of such firm given  upon their authority as
 experts in accounting and auditing.


               INFORMATION INCORPORATED BY REFERENCE

     The following documents previously filed by the Company with the
 Commission pursuant to the Exchange Act are hereby  incorporated  by
 reference into this Prospectus:

         (i)   the  Company's  Annual  Report  on  Form  10-K for the
               fiscal year ended January 31, 1996;

      (ii)     the  Company's Quarterly Report on Form 10-Q  for  the
               quarter ended April 30, 1996;
     (iii)     the Company's  Quarterly  Report  on Form 10-Q for the
               quarter ended July 31, 1996;

      (iv)     the Company's Quarterly Report on Form  10-Q  for  the
               quarter ended October 31, 1996;

       (v)     the    registration   statement   of   the   Company's
               predecessor  on  Form  8-A  filed  on  March  13, 1990
               registering  common stock of the Company's predecessor
               under Section  12(g) of the Securities Exchange Act of
               1934; and

      (vi)     the  Company's  Current   Report  on  Form  8-K  dated
               December 30, 1996.

     All documents filed by the Company pursuant  to  Section  13(a),
  13(c),  14  or  15(d)  of  the  Exchange Act after the date of this
 Prospectus and before the termination  of  the offering of shares of
 the Common Stock made hereby are hereby incorporated  by  reference,
 and such documents are deemed to be a part hereof from the  date  of
  filing  of  such  documents.  Any statement contained in a document
 incorporated or deemed  to be incorporated by reference herein shall
 be modified or superseded  for  purposes  of  this Prospectus to the
  extent  that  a  statement  contained  herein  or  in   any   other
 subsequently filed document which is or is deemed to be incorporated
 by reference herein modifies or supersedes such statement.  Any such
 statement so modified or superseded shall not, except as so modified
 or superseded, constitute a part of this Prospectus.

     THE   COMPANY  WILL  PROVIDE  WITHOUT  CHARGE  TO  EACH  PERSON,
 INCLUDING ANY  BENEFICIAL  OWNER  OF COMMON STOCK, TO WHOM A COPY OF
 THIS PROSPECTUS IS DELIVERED, UPON  THE  ORAL  OR WRITTEN REQUEST OF
 SUCH PERSON, A COPY OF ANY AND ALL OF THE INFORMATION  THAT HAS BEEN
 INCORPORATED BY REFERENCE IN THIS PROSPECTUS (NOT INCLUDING EXHIBITS
  TO  THE  INFORMATION THAT IS INCORPORATED BY REFERENCE UNLESS  SUCH
  EXHIBITS  ARE   SPECIFICALLY  INCORPORATED  BY  REFERENCE  IN  SUCH
  INFORMATION).  SUCH  REQUEST  SHOULD  BE  DIRECTED  TO  MICHAEL  D.
  BENNETT,   SECRETARY,   MFRI,  INC.,  7720  LEHIGH  AVENUE,  NILES,
 ILLINOIS 60714 (TELEPHONE (847) 966-1000).
<PAGE>
                              PART II

              INFORMATION NOT REQUIRED IN PROSPECTUS

 Item 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The  following table sets  forth  expenses  to  be  incurred  in
 connection  with  the  issuance  and  distribution of the securities
 being registered hereby:

      S.E.C. registration fee $ 4,949

     *Legal fees and expenses $ 5,000

     *Miscellaneous        $    500

               Total        $10,449

 ________________
 *   Estimated.
     The Company will pay all of the expenses  of the preparation, printing and
     filing  of  the  Registration  Statement,  any amendments  or  supplements
     thereto, and prospectuses and revised prospectuses  as  required  to cover
     the  transactions  covered  hereby,  as  well  as  the  Company's fees and
     disbursements of its counsel and accountants relating to  the Registration
     Statement, but the Selling Stockholders will bear their pro  rata  portion
     of  any  underwriting  discounts and commissions, brokers' commissions  or
     charges, or other costs  arising  in the marketing of the Shares and their
     own legal fees and expenses.

 Item 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     Section  145  of  the  Delaware  General  Corporation  Law  authorizes
  indemnification  of directors, officers,  employees  and  agents  of  the
 Company; allows the  advancement of costs of defending against litigation;
 and permits companies  incorporated  in  Delaware to purchase insurance on
 behalf of directors, officers, employees and  agents  against  liabilities
 whether or not in the circumstances such companies would have the power to
 indemnify against such liabilities under the provisions of the statute.

     The Company's Certificate of Incorporation and its By-Laws provide for
 indemnification of its officers and directors to the full extent permitted
 by Section 145 of the Delaware General Corporation Law.

     The Company's Certificate of Incorporation eliminates, to the  fullest
  extent  permitted by Delaware law, liability of a director to the Company
 or its stockholders  for  monetary damages for a breach of such director's
 fiduciary duty of care except  for liability where a director (a) breaches
 his or her duty of loyalty to the  Company  or its stockholders, (b) fails
  to  act  in good faith or engages in intentional  misconduct  or  knowing
 violation of law, (c) authorizes payment of an illegal dividend or a stock
 repurchase  or  (d) obtains an improper personal benefit.  While liability
 for monetary damages  has   been  eliminated,  equitable  remedies such as
 injunctive relief or rescission remain available.  In addition, a director
 is not relieved of his responsibilities under any other law, including the
 federal securities laws.

     The Company has entered into indemnification agreements  in  the  form
 described below with each person who is currently a member of the Board of
  Directors of the Company and will enter into such agreements with persons
 who  in  the future become directors of the Company.  Such indemnification
 agreements  provide  for  indemnification  against  any  and  all expenses
 incurred in connection with, as well as any and all judgments,  fines, and
  amounts  paid  in settlement resulting from, any threatened, pending,  or
  completed  action,   suit,   or   proceeding,  whether  civil,  criminal,
 administrative, or investigative (collectively  an "Action"), by reason of
  the fact that such director is or was a director,  officer,  employee  or
 agent  of  the Company, or is or was serving at the request of the Company
  as  a director,  officer,  employee  or  agent  of  another  corporation,
  partnership,   joint   venture,   trust,   or   other   enterprise.   The
  indemnification  agreements  provide  that  if  any  payment, advance  or
  indemnification  of the director requires that he or she  acted  in  good
 faith, in a manner  he or she reasonably believed to be for or not opposed
 to the best interests  of  the  Company  or  without  reasonable  cause to
 believe his or her conduct was unlawful, then it shall be presumed that he
  or she so acted unless proven otherwise by clear and convincing evidence.
 The  indemnification  agreements  also  provide for the advancement of all
  expenses,  including  reasonable  attorneys'   fees,   arising  from  the
  investigation  of  any claim, preparation for the defense or  defense  or
 settlement of an Action.   The  indemnification  agreements  authorize the
  Company  to  participate  in the defense of any action and to assume  the
 defense thereof, with counsel  who shall be reasonably satisfactory to the
 director, provided that the director shall be entitled to separate counsel
 of his or her choosing if he or  she  reasonably  believes  that (i) there
 exists conflicting interests between himself or herself and the Company or
 other parties (the defense of whom the Company shall have assumed) or (ii)
  there is any substantial likelihood that the Company will be  financially
 or  legally  unable  to  satisfy its obligations under the Indemnification
  Agreement.  The indemnification  agreements  provide  that  a  director's
 rights  under such contract are not exclusive of any other indemnification
 rights he  or  she  may  have  under  any  provision of law, the Company's
  Certificate  of  Incorporation  or By-laws, the  vote  of  the  Company's
 stockholders or disinterested directors, other agreements or otherwise.

 Item 16.  EXHIBITS.

     EXHIBIT   EXHIBIT
     NUMBER    DESCRIPTION

     2.1       Agreement for Merger by and between Midwesco, Inc. and MFRI,
               Inc.  [Incorporated  by  reference  to  Appendix  A  to  the
               Company's  Proxy  Statement dated November 12, 1996 relating
               to the Company's Special  Meeting  of  Stockholders  held on
               December 16, 1996].

     2.2       Agreement  and Plan of Merger by and between Midwesco,  Inc.
               and MFRI, Inc.  [Incorporated by reference to Exhibit 2.2 to
               the Company's  Current Report on Form 8-K dated December 30,
               1996 (SEC File No. 0-18370)].

     5         Form of Opinion  of  Rudnick  &  Wolfe  with  respect to the
               legality of the Common Stock being registered

     23.1      Consent of Deloitte & Touche LLP

     23.2      Consent of Rudnick & Wolfe (contained in Exhibit 5 hereof)

     24        Power of Attorney of directors and certain officers  of  the
               Company.

 Item 17.  UNDERTAKINGS.

     The Registrant hereby undertakes:

          (1)  To  file,  during  any  period  in which offers or sales are
     being made, a post-effective amendment to this registration statement;

              (i)   To include any prospectus required  by Section 10(a)(3)
          of the Securities Act of 1933;

             (ii)   To  reflect  in  the  prospectus  any facts  or  events
          arising  after  the effective date of the registration  statement
          (or  the most recent  post-effective  amendment  thereof)  which,
          individually  or in the aggregate, represent a fundamental change
          in the information set forth in the registration statement;

            (iii)   To include any material information with respect to the
          plan of distribution not previously disclosed in the registration
          statement or any  material  change  to  such  information  in the
          registration statement;

     PROVIDED,  HOWEVER,  that  paragraphs  (a)(1)(i) and (a)(1)(ii) do not
     apply if the registration statement is on  Form  S-3, Form S-8 or Form
     F-3, and the information required to be included in  a  post-effective
     amendment  by those paragraphs is contained in periodic reports  filed
     by the Registrant  pursuant  to  Section 13 or 15(d) of the Securities
     Exchange  Act  of  1934  that are incorporated  by  reference  in  the
     registration statement.

          (2)  That, for the purpose of determining any liability under the
     Securities Act of 1933, each  such  post-effective  amendment shall be
     deemed to be a new registration statement relating to  the  securities
     offered  therein,  and  the  offering of such securities at that  time
     shall be deemed to be the initial BONA FIDE offering thereof.

          (3)  To remove from registration  by  means  of  a post-effective
     amendment any of the securities being registered which  remain  unsold
     at the termination of the offering.

     The  undersigned  registrant  hereby  undertakes that, for purposes of
 determining any liability under the Securities Act of 1933, each filing of
 the registrant's annual report pursuant to  Section  13(a) or 15(d) of the
 Securities Exchange Act of 1934 (and, where applicable,  each filing of an
  employee benefit plan's annual report pursuant to Section  15(d)  of  the
 Securities  Exchange Act of 1934) that is incorporated by reference in the
 registration  statement shall be deemed to be a new registration statement
 relating to the  securities  offered  therein,  and  the  offering of such
  securities  at  that  time  shall  be deemed to be the initial BONA  FIDE
 offering thereof.

     The undersigned registrant hereby undertakes to deliver or cause to be
 delivered with the Prospectus, to each  person  to  whom the Prospectus is
  sent  or  given,  the  latest annual report to security holders  that  is
 incorporated by reference  in the Prospectus and furnished pursuant to and
 meeting the requirements of  Rule 14a-3 or Rule 14c-3 under the Securities
 Exchange Act of 1934; and, where interim financial information required to
 be presented by Article 3 of Regulation  S-X  is  not  set  forth  in  the
  Prospectus,  to  deliver, or cause to be delivered to each person to whom
 the Prospectus is sent  or  given,  the  latest  quarterly  report that is
  specifically incorporated by reference in the Prospectus to provide  such
 interim financial information.

     Insofar   as   indemnification   for  liabilities  arising  under  the
  Securities  Act  of  1933 may be permitted  to  directors,  officers  and
  controlling  persons  of   the   registrant  pursuant  to  the  foregoing
 provisions, or otherwise, the registrant  has  been  advised  that  in the
 opinion of the Securities and Exchange Commission such indemnification  is
  against  public  policy  as  expressed  in  the  Act  and  is, therefore,
 unenforceable. In the event that a claim for indemnification  against such
 liabilities (other than the payment by the registrant of expenses incurred
 or paid by a director, officer or controlling person of the registrant  in
  the  successful defense of any action, suit or proceeding) is asserted by
 such director,  officer  or  controlling  person  in  connection  with the
 securities being registered, the registrant will, unless in the opinion of
  its  counsel the matter has been settled by controlling precedent, submit
  to  a  court  of  appropriate  jurisdiction  the  question  whether  such
 indemnification by it is against public policy as expressed in the Act and
 will be governed by the final adjudication of such issue.
<PAGE>
                            SIGNATURES

     Pursuant  to  the  requirements  of  the  Securities  Act of 1933, the
  registrant  certifies that it has reasonable grounds to believe  that  it
 meets all of the  requirements  for filing on Form S-3 and has duly caused
 this registration statement to be signed on its behalf by the undersigned,
 thereunto duly authorized, in the  City  of  Niles,  State of Illinois, on
 February 14, 1997.

                                   MFRI, INC.


                                   By:/S/ DAVID UNGER
                                        David Unger
                                        Chairman of the Board and Chief
                                        Executive Officer

     Pursuant  to  the  requirements of the Securities Act  of  1933,  this
 registration statement has  been  signed below by the following persons in
 the capacities and on the date indicated.

     SIGNATURE                TITLE               DATE

     David Unger*         Director and Chairman of the
                          Board of Directors (Principal
                          Executive Officer)      February 14, 1997

     Henry M. Mautner*    Director, Vice Chairman of
                          the Board of Directors  February 14, 1997

     Gene K. Ogilvie*     Director and Vice President February 14, 1997

     Michael D. Bennett*  Vice President, Secretary and
                          Treasurer (Principal Financial
                          and Accounting Officer)  February 14, 1997

     Fati Elgendy*        Director and Vice President February 14, 1997

     Don Gruenberg*       Director and Vice President February 14, 1997

     Bradley E. Mautner*  Director and Vice President February 14, 1997

     Eugene Miller*       Director                February 14, 1997



 *By:/S/ DAVID UNGER    Individually and as Attorney- February 14, 1997
      David Unger     in-fact


<PAGE>
                           EXHIBIT INDEX


 EXHIBIT  EXHIBIT
 NUMBER   DESCRIPTION

 2.1      Agreement for Merger by and between Midwesco, Inc. and MFRI, Inc.
          [Incorporated by reference  to  Appendix A to the Company's Proxy
          Statement  dated  November 12, 1996  relating  to  the  Company's
          Special Meeting of Stockholders held on December 16, 1996].

 2.2      Agreement and Plan  of  Merger  by and between Midwesco, Inc. and
          MFRI, Inc.  [Incorporated by reference  to  Exhibit  2.2  to  the
          Company's Current Report on Form 8-K dated December 30, 1996 (SEC
          file No. 0-18370)].

   5      Form  of  Opinion of Rudnick & Wolfe with respect to the legality
          of the Common Stock being registered.

  23.1    Consent of Deloitte & Touche LLP.

  23.2    Consent of Rudnick & Wolfe (contained in Exhibit 5 hereof).

  24      Power of Attorney  by  the  Directors and certain officers of the
          Company.





















                                                        EXHIBIT 5

                          RUDNICK & WOLFE
                     203 NORTH LASALLE STREET
                   CHICAGO, ILLINOIS 60601-1293

                        February    , 1997         (312) 368-4000

 The Board of Directors
 MFRI, Inc.
 7720 Lehigh Avenue
 Niles, IL 60714

 Gentlemen:

     We have examined the registration  statement on Form S-3 (Registration
 No. 333-_____) filed with the Securities  and  Exchange  Commission  on or
  about  February  17,  1997,  for registration under the Securities Act of
 1933, as amended, of 2,124,298  shares  of  common  stock of MFRI, Inc., a
 Delaware corporation (the "Company"), par value $.01  per  share  ("Common
  Stock").   We have examined pertinent corporate documents and records  of
 the Company,  including  its Certificate of Incorporation and its By-Laws,
 and we are familiar with the corporate proceedings had and contemplated in
 connection with the issuance  of  such  shares  of  Common  Stock  by  the
  Company.   We  have  also  made such other examinations as we have deemed
 necessary or appropriate as a basis for the opinion hereinafter expressed.

     On  the basis of the foregoing,  we  are  of  the  opinion  that  such
 2,124,298 shares of Common Stock of the Company have been duly authorized,
 and are legally issued, fully paid and non-assessable.

     We hereby  consent  to the filing of this opinion as an exhibit to the
  registration  statement  and   to  the  reference  to  our  firm  in  the
 registration statement under the caption "Legal Matters."

                                  Very truly yours,

                                  RUDNICK & WOLFE



                                  By:
                                      Hal M. Brown, a Partner




                                                     EXHIBIT 23.1


                CONSENT OF INDEPENDENT ACCOUNTANTS


  We  consent  to  the  incorporation by  reference  in  this  Registration
 Statement of MFRI, Inc.  on  Form  S-3 of our report dated April 24, 1996,
 appearing in the Annual Report on Form  10-K  of  MFRI,  Inc. for the year
 ended January 31, 1996 and to the reference to us under the  "Experts"  in
 the Prospectus, which is part of this Registration Statement.



                                   /S/  DELOITTE & TOUCHE LLP
                                   Deloitte & Touche LLP


 Chicago, Illinois
 February 14, 1997


           
                                            EXHIBIT 24


                         POWER OF ATTORNEY


     KNOW  ALL MEN BY THESE PRESENTS, that each of the undersigned, being a
 director or  officer,  or both, of MFRI, Inc., a Delaware corporation (the
 "Company"), does hereby  constitute  and  appoint  David  Unger,  Henry M.
 Mautner, Bradley E. Mautner, Fati Elgendy and Michael D. Bennett with full
  power  of  substitution and resubstitution to each of said attorneys,  to
 execute, file  or  deliver  any  and all instruments and to do any and all
 acts and things which said attorneys  and  agents,  or  any  of them, deem
 advisable to enable the Company to comply with the Securities Act of 1933,
  as  amended,  and  any requirements or regulations of the Securities  and
  Exchange  Commission  in   respect   thereto,   in  connection  with  the
 registration under said Securities Act of the sale  of  shares  of  common
  stock of the Company by certain stockholders of the Company, which shares
 are to be issued by the Company in connection with the merger of Midwesco,
 Inc.,  an  Illinois  corporation, and the Company, including specifically,
 but without limitation  of the general authority hereby granted, the power
 and authority to sign his  or her name as director or officer, or both, of
 the Company, as indicated below  opposite  his  or  her  signature, to the
  registration  statements  and  any  amendment, post-effective  amendment,
 supplement or papers supplemental thereto,  to  be  filed  with respect to
 said shares of common stock, and each of the undersigned does hereby fully
 ratify and confirm all that said attorneys and agents, or any one of them,
 or the substitute of any of them, shall do or cause to be done  by  virtue
 hereof.

     IN  WITNESS  WHEREOF,  each  of  the  undersigned has subscribed these
 presents, this 14th day of February, 1997.

     SIGNATURE                          TITLE

     /S/ DAVID UNGER               Director, Chairman of the Board of
     David Unger                   Directors   and   President   (Principal
                                   Executive Officer)

     /S/ HENRY M. MAUTNER          Director and Vice Chairman of the  Board
 of
     Henry M. Mautner              Directors

     /S/ GENE K. OGILVIE           Director and Vice President
     Gene K. Ogilvie

     /S/ MICHAEL D. BENNETT        Vice President, Secretary and Treasurer
     Michael D. Bennett            (Principal   Financial   and  Accounting
                                   Officer)

     /S/ FATI ELGENDY              Director and Vice President
     Fati Elgendy

     /S/ DON GRUENBERG             Director and Vice President
     Don Gruenberg

     /S/ BRADLEY E. MAUTNER        Director and Vice President
     Bradley E. Mautner

     /S/ EUGENE MILLER             Director
     Eugene Miller








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