ECOLAB INC
8-K, 1997-12-16
SOAP, DETERGENTS, CLEANG PREPARATIONS, PERFUMES, COSMETICS
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<PAGE>
                    SECURITIES AND EXCHANGE COMMISSION
                         Washington, D.C.  20549


                                 FORM 8-K

                              CURRENT REPORT
  Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
                                           


Date of Report (Date of earliest event reported):         December 8, 1997
                                                  ------------------------



                                ECOLAB INC.
- -------------------------------------------------------------------------------
           (Exact name of registrant as specified in its charter)



          Delaware                    1-9328                   41-0231510
     -------------------        ------------------         ------------------
(State or other jurisdiction       (Commission               (IRS Employer
     of incorporation)             File Number)            Identification No.)  
          


      Ecolab Center, 370 N. Wabasha, St. Paul, Minnesota            55102
- --------------------------------------------------------------------------------
         (Address of principal executive offices)               (Zip Code)


Registrant's telephone number, include area code:          612-293-2233         
                                                  ------------------------------

                              (Not applicable)     
- --------------------------------------------------------------------------------
       (Former name or former address, if changed from last report.)

<PAGE>

Item 2.  ACQUISITION OR DISPOSITION OF ASSETS

     On December 8, 1997, Ecolab Australia Pty Limited, an indirect 
wholly-owned subsidiary of the Registrant located in Sydney, New South Wales, 
Australia ("Ecolab Australia"), completed its tender offer ("Offer") 
commenced on October 17, 1997 to purchase all of the approximately 22.4 
million outstanding ordinary shares ("Shares") of Gibson Chemical Industries 
Limited ("Gibson"). Gibson is headquartered in Melbourne, Victoria, Australia 
and was traded on the Australian Stock Exchange.  The offer price was for 
A$9.00 per share (or A$8.50 per share for Gibson shareholders who chose to 
keep an A$0.50 per share dividend by tendering after October 31, 1997).  
Ecolab Australia acquired certain of the Shares in privately negotiated and 
open market purchases ("Market Purchases") prior to and during the Offer.

     Ecolab Australia was the beneficial owner of approximately 98% of the 
Shares upon completion of the Offer.  It has begun the process of compulsory 
acquisition of the Shares it does not yet beneficially own.  Compulsory 
acquisition is provided under the Australian Corporations Law and will allow 
Ecolab Australia to require the sale to it of all such remaining Shares at a 
price per share of A$8.50. Ecolab Australia expects to complete this 
compulsory acquisition in approximately 30 days.

     The persons solicited to tender Shares in the Offer, as well as persons 
from whom Shares were acquired in the Market Purchases, were the holders of 
the outstanding Shares of Gibson, none of whom had any material relationship 
with or to the Registrant or its affiliates or any director or officer of 
Registrant or associate of any such director or officer.  

     The total purchase price for all of the Shares, including those acquired 
by compulsory acquisition, will be approximately A$192 million.  Financing 
for the Offer has been provided by the Australian Dollar Local Currency 
Addendum (the "Addendum"), dated as of October 17, 1997 among the Registrant, 
its direct wholly-owned subsidiary, Ecolab Pty Limited (which is the parent 
company of Ecolab Australia), Citibank, N.A., as Agent, Citisecurities 
Limited, as Local Currency Agent, and a consortium of the following banks:  
Citibank, N.A., Morgan Guaranty Trust Company of New York, The First National 
Bank of Chicago and Credit Suisse First Boston (collectively the "Local 
Currency Banks").  The Addendum, which replaced an A$40 million short-term 
facility  provided to Ecolab Pty Limited by Citibank, N.A. to finance initial 
Market Purchases of the Shares, is an addendum to the Registrant's $275 
million Multicurrency Credit Agreement and provides for the Local Currency 
Banks to make available Australian dollars up to the U.S. dollar equivalent 
of $176 million of such banks' commitments under the Multicurrency Credit 
Agreement.

     Gibson is engaged principally in the supply of cleaning and sanitation 
chemicals and services to the hospitality and health care industries and to 
catering institutions and the supply of specialty chemicals and services to 
major manufacturing and mining industries.  Its business is conducted through 
the following business groups:  maintenance chemicals (including hospitality, 
laundry and health care markets), water treatment (including commercial water 
treatment, industrial water treatment and process chemicals divisions), 
automotive (specialty sealants), thermochemical (steel making processes), 
biological  and retail (branded products sold though a network of 
distributors and retailers).  Its manufacturing and/or distribution 
operations are located in Australia, New Zealand, Southeast Asia, the United 
Kingdom and the United States. 

                                       -2-
<PAGE>

   The Registrant intends (i) to quickly combine operational assets of Ecolab 
Pty Limited and Gibson, which may lead to the sale of surplus facilities and 
real estate of Gibson and/or Ecolab Pty Limited, and (ii) to eliminate some 
duplication of functions arising as a result of the acquisition. The key 
areas of duplication are expected to arise in the corporate office functions 
of Gibson such as administration, finance and public company compliance and 
reporting functions, and may arise in the manufacturing, marketing, 
distribution, logistics and research and development functions. Registrant is 
also conducting a full review of Gibson and its assets, operations and 
properties but has made no decision concerning changes to the business or 
redeployment of Gibson's assets. Unless and until any such decision is made, 
Registrant intends to continue the business of Gibson generally.

   A copy of the News Release issued by the Registrant on December 16, 1997 
is attached as Exhibit (99).

Item 7.  FINANCIAL STATEMENTS AND EXHIBITS.

         (c)  Exhibits
                    
              (2)A.  Ecolab Australia Pty Limited Offer to Purchase, 
                     distributed October 17, 1997, ("Offer to Purchase").

              (2)B.  Form of Acceptance and Transfer.

              (2)C.  Notice of Variation, dated 13 November 1997.

              (2)D.  Notice of Variation, dated 21 November 1997.

              (4)A.  Multicurrency Credit Agreement 
                     ("Credit Agreement") dated as of September 29, 1993, 
                     as Amended and Restated as of October 17, 1997, among 
                     Ecolab Inc., the Banks parties thereto, Citibank, 
                     N.A., as Agent for the Banks, Citibank International 
                     Plc, as Euro-Agent for the Banks and Morgan Guaranty 
                     Trust Company of New York as Co-Agent-Incorporated by 
                     reference to Exhibit (4)A of the Company's Form 10-Q 
                     for the quarter ended September 30, 1997.

              (4)B.  Australian Dollar Local Currency 
                     Addendum to the Credit Agreement dated as of October 
                     17, 1997 among Ecolab Pty. Limited, Ecolab Inc., 
                     Citibank, N.A., the Local Currency Agent named 
                     therein and the Local Currency Banks party 
                     thereto-Incorporated by reference to Exhibit 4(B) of 
                     the Company's Form 10-Q for the quarter ended 
                     September 30, 1997.

             (99)    Ecolab Inc. News Release dated December 16, 1997.


                                       -3-

<PAGE>

     Certain related annexures to the Offer to Purchase, which are 
listed below, are omitted.  The Registrant will furnish supplementally a copy 
of any such annexures to the Securities and Exchange Commission upon request.

                       ANNEXURES TO OFFER TO PURCHASE

Annexure A  Gibson announcement of new Chairman - elect - 8 July 1996.

Annexure B  Gibson notice of annual general meeting - 23 October 1996.

Annexure C  Gibson announcement concerning sale of in-store cleaning and
            sanitizing business of Puritan/Churchill Chemical Company to S.C.
            Johnson & Son - 6 November 1996.

Annexure D  Gibson announcement of resignation of director - 6 November 1996.

Annexure E  Gibson Group Managing Director Address to Annual General Meeting
            of Shareholders - 13 November 1996 (with addendum dated 14 November
            1996).

Annexure F  Gibson announcement of retirement of directors - 14 November 1996.

Annexure G  Gibson announcement of new chairman and retirement of director - 18
            November 1996.

Annexure H  Gibson announcement of joint venture will Chemetall GmbH - 19
            February 1997.

Annexure I  Gibson half-yearly announcement to 31 December 1996 - 13 March 1997.

Annexure J  Gibson announcement of acquisition of Intergrain Timber Finishes
            Pty Limited - 4 July 1997.

Annexure K  Commitments of Banks under Credit Agreement.

Annexure L  Conditions Precedent to Credit Agreement.

Annexure M  Terms of Redeemable Preference Shares of Ecolab Australia.

Annexure N  Conditions Precedent to A$40 million loan facility of Ecolab Pty
            Limited.

Annexure O  Modification to allow Offer to be for both Fully Paid Shares and
            Partly Paid Shares of  Gibson.

Independent Expert's Report - Exhibit to Gibson's Part B Statement to the Offer
to Purchase.

                                       -4-

<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.

                                     ECOLAB INC.



                                     By:  /s/ Kenneth A. Iverson
                                        ---------------------------------------
                                          Kenneth A. Iverson
                                          Vice President and Secretary


Date: December 16, 1997

                                       -5-

<PAGE>

                                  EXHIBIT INDEX
                                  -------------
 
EXHIBIT NO.  DESCRIPTION                              METHOD OF FILING
- -----------  -----------                              ----------------

(2)A.        Ecolab Australia Pty Limited Offer to   Filed herewith
             Purchase, distributed October 17, 1997, electronically.
             ("Offer to Purchase").

(2)B.        Form of Acceptance and Transfer.        Filed herewith
                                                     electronically.

(2)C.        Notice of Variation, dated 13           Filed herewith
             November 1997.                          electronically.

(2)D.        Notice of Variation, dated 21           Filed herewith
             November 1997.                          electronically.


(4)A.        Multicurrency Credit Agreement          Incorporated by reference
             ("Credit Agreement") dated as of        to Exhibit (4)A of the
             September 29, 1993, as Amended and      Company's Form 10-Q for
             Restated as of October 17, 1997,        the quarter ended
             among Ecolab Inc., the Banks parties    September 30, 1997.
             thereto, Citibank, N.A., as Agent for
             the Banks, Citibank International Plc,
             as Euro-Agent for the Banks and
             Morgan Guaranty Trust Company of
             New York as Co-Agent.

(4)B.        Australian Dollar Local Currency        Incorporated by reference
             Addendum to the Credit Agreement        to Exhibit 4(B) of the
             dated as of October 17, 1997 among      Company's Form 10-Q for
             Ecolab Pty. Limited, Ecolab Inc.,       the quarter ended
             Citibank, N.A., the Local Currency      September 30, 1997.
             Agent named therein and the Local
             Currency Banks party thereto.

(99)         Ecolab Inc. News Release dated          Filed herewith
             December 16, 1997.                      electronically.


     Certain related annexures to the Offer to Purchase, which are listed 
below, are omitted.  The Registrant will furnish supplementally a copy of any 
such annexures to the Securities and Exchange Commission upon request.

<PAGE>

                         ANNEXURES TO OFFER TO PURCHASE
                         ------------------------------

Annexure A  Gibson announcement of new Chairman - elect - 8 July 1996.

Annexure B  Gibson notice of annual general meeting - 23 October 1996.

Annexure C  Gibson announcement concerning sale of in-store cleaning and
            sanitizing business of Puritan/Churchill Chemical Company to S.C.
            Johnson & Son - 6 November 1996.

Annexure D  Gibson announcement of resignation of director - 6 November 1996.

Annexure E  Gibson Group Managing Director Address to Annual General Meeting
            of Shareholders - 13 November 1996 (with addendum dated 14 November
            1996).

Annexure F  Gibson announcement of retirement of directors - 14 November 1996.

Annexure G  Gibson announcement of new chairman and retirement of director - 18
            November 1996.

Annexure H  Gibson announcement of joint venture will Chemetall GmbH - 19
            February 1997.

Annexure I  Gibson half-yearly announcement to 31 December 1996 - 13 March 1997.

Annexure J  Gibson announcement of acquisition of Intergrain Timber Finishes
            Pty Limited - 4 July 1997.

Annexure K  Commitments of Banks under Credit Agreement.

Annexure L  Conditions Precedent to Credit Agreement.

Annexure M  Terms of Redeemable Preference Shares of Ecolab Australia.

Annexure N  Conditions Precedent to A$40 million loan facility of Ecolab Pty
            Limited.

Annexure O  Modification to allow Offer to be for both Fully Paid Shares and
            Partly Paid Shares of  Gibson.

Independent Expert's Report - Exhibit to Gibson's Part B Statement to Offer.


<PAGE>

                                     ECOLAB

                           ECOLAB AUSTRALIA PTY LIMITED
                                (ACN 079 704 939)

                             RECOMMENDED $9.00 OFFER
                         FOR ALL YOUR ORDINARY SHARES IN


                                      GCI

                        Gibson Chemical Industries Limited
                               (ACN 004 494 802)

                               GIBSON'S DIRECTORS
                              RECOMMEND YOU ACCEPT
                                 ECOLAB'S OFFER

                          SUBJECT TO NO HIGHER OFFER

  This document includes important information in relation to your shares in
   Gibson Chemical Industries Limited and requires YOUR IMMEDIATE ATTENTION.


ADVISERS TO ECOLAB                                            ADVISERS TO GIBSON
FINANCIAL: SBC WARBURG DILLON READ        FINANCIAL: MACQUARIE CORPORATE FINANCE
LEGAL: BAKER & MCKENZIE                     LEGAL: ARTHUR ROBINSON & HEDDERWICKS

<PAGE>

TABLE OF CONTENTS

Letter from Ecolab                                     1A
- ---------------------------------------------------------

Letter from the Chairman of Gibson                     1B
- ---------------------------------------------------------

Key Information on the Offer                            2
- ---------------------------------------------------------

Offer                                                   4
- ---------------------------------------------------------

Part A Statement                                       15
- ---------------------------------------------------------

Annexures                                              30
- ---------------------------------------------------------

Part B Statement                                       92
- ---------------------------------------------------------

Independent Expert's Report                            99
- ---------------------------------------------------------

ENQUIRIES

About the Offer:                   Ian Cornish
                                   Company Secretary
                                   Gibson Chemical Industries Limited
                                   Telephone: (03) 9583 3201

                                   Offer Information Hot Line
                                   Free call 1 800 021 202


About the acceptance procedure:    Coopers & Lybrand Securities Registration 
                                     Services
                                   Telephone: (02) 9285 7111

<PAGE>

ECOLAB
- --------------------------------------------------------------------------------
ECOLAB AUSTRALIA PTY LIMITED
ACN 079 704 939

17 October 1997


Dear Gibson Shareholder

On 10 October 1997, the Board of Gibson Chemical Industries Limited ("Gibson") 
announced that it had unanimously recommended that shareholders accept Ecolab's 
increased cash offer of $9.00 per share, in the absence of a higher offer.  We 
now enclose the documents to enable you to accept our cash offer for your 
shares in Gibson.

We believe that our offer of $9.00 is very generous and note it represents:

- -    a multiple of approximately 21.6 times Gibson's 1997 earnings per share 
     (fully diluted, ex abnormals);

- -    a premium of approximately 47.1% over Gibson's 12 month weighted average 
     share price prior to Ecolab's on market purchases; and

- -    a premium to net tangible assets per share (as at 30 June 1997) of 
     approximately 172.7%.

The offer price is within the independent expert's valuation range for Gibson 
and if the offer is not successful, the independent expert has stated that "it 
is likely that Gibson shares would trade at prices below the bid price".

You have the alternative of receiving either:

- -    $9.00 cash per share; or

- -    $8.50 cash per share together with a fully franked dividend of $0.50 per 
     share which has already been declared by Gibson.

Detailed instructions on how to accept the offer are set out on the following 
pages and we encourage you to read this information carefully.

Your Board has unanimously recommended that you accept our offer for your 
shares and their response is included in this document.  Our offer is scheduled 
to close on 17 November 1997 and we encourage you to accept our offer.  Ecolab 
will pay accepting shareholders within 14 days of the receipt of valid 
acceptances or the offer becoming unconditional, whichever is the later.

We look forward to a new era of growth and development for the Ecolab and 
Gibson businesses.

Yours sincerely


/s/Lawrence T. Bell
Lawrence T. Bell
Director
Ecolab Australia Pty Limited

<PAGE>

                                      GCI
                       GIBSON CHEMICAL INDUSTRIES LIMITED
      350 Reserve Road Cheltenham Victoria Australia 3192 ACN 004 494 802
              Telephone (613) 9583 3201 Fax (613) 9593 0989
17 October 1997

Dear shareholder,

Earlier this month it was announced that, after due consideration, your Board 
had unanimously recommended that Gibson Chemical Industries Limited ("Gibson") 
shareholders accept the $9.00 offer from Ecolab Australia Pty Limited 
('Ecolab") in the absence of a higher offer.

This revised $9.00 offer represents a substantial price increase over Ecolab's 
initial public offer of $8.25 per share and values Gibson at more than $200 
million.  Your Board believes this is a good result for Gibson shareholders and 
presents you with the opportunity to realise your Gibson shares for a 
significant premium to the pre-offer share price.

Your Board has explored other possibilities to maximise shareholder wealth and 
none would give this level of benefit to shareholders.  Your Directors intend 
to accept the offer in respect of all shares owned or controlled by them.

The Board commissioned Grant Samuel & Associates Pty Limited ("Grant Samuel"), 
a leading Australian company valuer, to undertake an independent valuation of 
the company.  Grant Samuel valued Gibson at $8.91 to $10.14 per share and 
concluded that Ecolab's offer is fair and reasonable to shareholders. Grant 
Samuel's valuation report is contained in full in this booklet.

Under Ecolab's revised offer, shareholders can choose between accepting either 
$9.00 cash or $8.50 cash and a 50 cent fully franked dividend. Due to the value 
of the franking credits attached to the dividend, the cash and dividend offer 
could be equivalent to a cash offer of up to $9.28 for many shareholders. 
However, the value of each alternative to you will depend on your own tax 
circumstances.

Information on how to accept the offer and on which alternative may be more 
appropriate for you to accept is provided on pages 2 and 3 of this booklet.  
You should read these pages and follow the instructions carefully. If you wish 
to accept the offer and receive $9.00 cash and no dividend, your acceptance 
must be received before 5:00 pm Friday 31 October 1997.  If you wish to accept 
the offer and receive $8.50 cash and a 50 cent dividend, you have until 17 
November 1997 to consider the offer, unless it is extended.  If you have any 
doubt as to what you should do with this offer you should consult your 
financial or tax adviser.

The reasons for your Directors' recommendation and other important information 
are set out in Gibson's Part B statement, which is included in this booklet.  I 
recommend that you consider this material carefully.

Finally, on behalf of the Board, I would like to thank all shareholders for the 
support you have provided Gibson over many years.

Yours sincerely


/s/Richard F E Warburton
Richard F E Warburton
CHAIRMAN

<PAGE>

KEY INFORMATION ON THE OFFER


OFFER

Ecolab is offering to acquire all of your shares in Gibson.

CONSIDERATION

The offer is $9.00 for each fully paid Gibson share.  Gibson shareholders who 
wish to accept the offer may choose between $9.00 cash and no dividend or $8.50 
cash and a 50 cent fully franked dividend.

No brokerage or stamp duty is payable by shareholders who accept the offer.

CONDITIONS

The offer is only conditional on a "prescribed occurrence" not occurring in 
relation to Gibson.  These prescribed occurrences are detailed in Ecolab's 
offer document on page 9.  If no such event occurs, Ecolab has stated the offer 
will be declared unconditional on or prior to 7 November 1997.

WHICH ALTERNATIVE SHOULD YOU CHOOSE?

The alternative most appropriate for you will depend on your own circumstances. 
If you are in any doubt as to which offer is most appropriate, you should seek 
your own financial or tax advice.

Those shareholders who wish to accept the offer and:

- -    who purchased their Gibson shares prior to 19 September 1985 and whose 
     shares have retained their capital gains tax free status; and 

- -    who have a marginal income tax rate above 36%,

may prefer the $9.00 cash alternative.

All other shareholders who wish to accept the offer MAY prefer the $8.50 cash 
and 50 cent fully franked dividend alternative.

HOW TO ACCEPT THIS OFFER

If you wish to accept this offer, the procedure for acceptance depends on which 
alternative you select and on which subregister your Gibson shares are 
registered on.

The subregister your Gibson shares are registered on should be stated on your 
acceptance form.  If you are in any doubt as to which subregister your Gibson 
shares are registered on you should contact Coopers & Lybrand Securities 
Registration Services on (02) 9285 7111.

<PAGE>

                              ALTERNATIVE SELECTED

<TABLE>
<CAPTION>
         -----------------------------------------------------------------------------------------------------------------------
                             $9.00 CASH & NO DIVIDEND                           $8.50 CASH & 50 CENT DIVIDEND
- --------------------------------------------------------------------------------------------------------------------------------
<S>        <C>             <C>                                       <C>
           Issuer          YOU MUST HAVE YOUR ACCEPTANCE             YOU MUST HAVE YOUR ACCEPTANCE RECEIVED PRIOR 
           Sponsored       RECEIVED BY ECOLAB NO LATER THAN          TO THE CLOSE OF THE OFFER (WHICH IS 17 NOVEMBER 
           Subregister     5:00 PM ON FRIDAY, 31 OCTOBER 1997 AND    1997, UNLESS EXTENDED) AND YOU MUST EITHER:
                           YOU MUST NOT TICK THE BOX LABELLED        -  HAVE YOUR ACCEPTANCE RECEIVED BY ECOLAB 
                           "D" ON THE ACCEPTANCE FORM.                  AFTER FRIDAY, 31 OCTOBER 1997; OR
                                                                     -  IF YOUR ACCEPTANCE IS RECEIVED PRIOR TO 5:00 PM 
                                                                        ON FRIDAY 31 OCTOBER YOU MUST TICK THE BOX 
                                                                        LABELLED "D" ON THE ACCEPTANCE FORM.
                                                                     -----------------------------------------------------------
                                                                     If you do not tick the box labelled "D" and Ecolab 
                                                                     receives your acceptance prior to Friday, 31 October 
                                                                     1997 you will receive $9.00 cash and no dividend.
                                                                     -----------------------------------------------------------
Regist-
ration   -----------------------------------------------------------------------------------------------------------------------
           CHESS           YOU MUST INSTRUCT YOUR CHESS              YOU MUST INSTRUCT YOUR CHESS CONTROLLING 
           Subregister     CONTROLLING PARTICIPANT TO INITIATE       PARTICIPANT TO INITIATE THE ACCEPTANCE ON CHESS 
                           THE ACCEPTANCE ON CHESS NO LATER          AFTER 31 OCTOBER 1997.
                           THAN 5:00 PM FRIDAY, 31 OCTOBER 1997.
                                                                     -----------------------------------------------------------
                                                                     If your acceptance is initiated prior to 5.00 pm on Friday 
                                                                     31 October 1997 you will receive $9.00 cash and no 
                                                                     dividend.
                                                                     -----------------------------------------------------------

- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>

PAYMENT TERMS

Those shareholders who choose to accept the offer will be paid the later of:

14 days after acceptance is received; or
14 days after the offer becomes unconditional.

Those shareholders who elect to receive the $8.50 cash and 50 cent dividend are 
advised that the dividend will be paid on 14 November 1997.

EXPIRY OF OFFER

The offer expires, unless extended, at 5.00 pm Monday 17 November 1997.

NON-ACCEPTING SHAREHOLDERS

Holders of fully paid shares who do not accept the offer (and are still on the 
register as at 5.00 pm  7 November 1997) will be paid the 50 cent dividend on 
14 November 1997.

- --------------------------------------------------------------------------------
INFORMATION

If you have any general enquiries regarding the offer, you should contact 
Gibson's Company Secretary, Mr. Ian Cornish, on (03) 9583 3201 or the Offer 
Information Hotline on 1800 021 202.

If you are in any doubt as to which alternative you should accept, you should 
contact you financial or tax advisor.

If you have any enquiries regarding how to accept the offer or which 
subregister your Gibson shares are registered on, you should contact Coopers & 
Lybrand Securities Registration Services on (02) 9285 7111.
- --------------------------------------------------------------------------------

<PAGE>

                                     OFFER

                                       BY

                          ECOLAB AUSTRALIA PTY LIMITED
                                   ("ECOLAB")

                     TO ACQUIRE ALL OF YOUR ORDINARY SHARES

                                       IN

              GIBSON CHEMICAL INDUSTRIES LIMITED (ACN 004 494 802)
                                   ("GIBSON")

- -------------------------------------------------------------------------------
1.  ECOLAB'S OFFER
- -------------------------------------------------------------------------------

1.1      Ecolab offers to acquire all of Your Shares on the terms and conditions
         of this Offer.

1.2      If you accept this Offer, Ecolab will be entitled to the benefit of all
         Rights attaching to Your Shares.  Please carefully note clause 7.6 
         below in this regard.

- -------------------------------------------------------------------------------
2.  CONSIDERATION
- -------------------------------------------------------------------------------

2.1      The consideration Ecolab offers you is $9.00 cash for each of Your 
         Fully Paid Shares.

2.2      The consideration Ecolab offers you is $9.00 cash (less the Unpaid 
         Amount) for each of Your Partly Paid Shares.

2.3      You have the opportunity to take up to $0.50 of the amount payable for 
         each of Your Shares in the form of dividends from Gibson instead of a 
         cash payment from Ecolab.  See clause 7.6 for details.

- -------------------------------------------------------------------------------
3.  OFFER PERIOD
- -------------------------------------------------------------------------------

Unless withdrawn in accordance with the Law, this Offer will remain open for 
acceptance for a period commencing on the date of this Offer and ending at 5 pm 
on 17 November 1997 subject to Ecolab's right to extend such period in 
accordance with section 656 of the Law.

<PAGE>

- -------------------------------------------------------------------------------
4.  WHO MAY ACCEPT
- -------------------------------------------------------------------------------

4.1      This Offer is made to you as the holder of Gibson Shares which are 
         registered or entitled to be registered in your name in the register 
         of members of Gibson on the date this Offer is sent or at any time 
         prior to the end of the Offer Period.  If at any time during the Offer 
         Period, another person is, or is entitled to be, registered as a 
         holder of some or all of Your Shares ("the Transferred Shares"), then 
         in accordance with section 649 of the Law:

         (a)    an offer corresponding to this Offer is deemed to have been
                made to that person in respect of the Transferred Shares of 
                which that person is, or is entitled to be, so registered as a 
                holder;

         (b)    an offer corresponding to this Offer is deemed to have been
                made to you in respect of the remainder (if any) of the Gibson 
                Shares other than the Transferred Shares registered in your 
                name on the date this Offer is sent, or at any time prior to 
                the end of the Offer Period; and

         (c)    this original Offer is deemed to have been withdrawn.

4.2      If:

         (a)    at any time during the Offer Period and prior to acceptance of
                this Offer, Your Shares consist of two or more Distinct Portions
                (for example, if you hold Your Shares as trustee for 2 or more 
                persons); and

         (b)    you give to Ecolab a notice which:

                (i)    if it relates to Your Shares in a CHESS Holding, is in an
                       electronic form approved by the SCH Business Rules; or

                (ii)   if it relates to Your Shares which are certificated or
                       uncertificated but not in a CHESS Holding, is in writing,

                stating, that Your Shares consist of Distinct Portions and 
                specifying the number of Your Shares in each Distinct Portion 
                for which you wish to accept this Offer (which number, in 
                respect of each Distinct Portion, must comply with clause 5.1),

         this Offer will be deemed to consist of separate Offers made to you in 
         relation to the respective Distinct Portions of Your Shares.

- -------------------------------------------------------------------------------
5.  HOW TO ACCEPT
- -------------------------------------------------------------------------------

5.1      Subject to clause 4, this Offer may only be accepted in respect of all 
         (but not some only) of Your Fully Paid Shares and/or all (but not some 
         only) of Your Partly Paid Shares.

<PAGE>

5.2      You may accept this Offer in respect of Your Shares at any time during 
         the Offer Period.

5.3      To accept this Offer in respect of Your Shares which are certificated 
         or are uncertificated but not in a CHESS Holding, you should complete
         and sign the Acceptance Form in accordance with the instructions on it 
         and then post the Acceptance Form to:

         Coopers & Lybrand Securities Registration Services
         Locked Bag A14
         Sydney South NSW 1232

         or hand deliver the Acceptance Form to:

         Coopers & Lybrand Securities Registration Services
         Level 8
         Coopers & Lybrand Tower
         580 George Street
         SYDNEY NSW

         so that it is received before the expiry of the Offer Period.

5.4      To accept this Offer in respect of Your Shares which are uncertificated
         and which are in a CHESS Holding you must do so in accordance with the 
         SCH Business Rules and, specifically:

         (a)    if you are a Broker or Non-Broker Participant, you should 
                initiate acceptance of this Offer in accordance with the SCH 
                Business Rules before the expiry of the Offer Period; or

         (b)    otherwise, you should instruct your Controlling Participant 
                (this will normally be the stockbroker who purchased your 
                Gibson Shares for you) to initiate acceptance of this Offer in 
                accordance with the SCH Business Rules before the expiry of the 
                Offer Period.

5.5      When accepting this Offer for Your Shares which are certificated, you 
         must also provide all certificates relating to Your Shares, or fulfil 
         all the requirements of Ecolab and Gibson if you are unable to provide
         the certificates, to enable the registration of Ecolab as a bona fide 
         purchaser of Your Shares for value and without notice of any defect in 
         your title to Your Shares.

5.6      Subject to clause 5.4, acceptance of the Offer will not be complete 
         until the completed Acceptance Form has been received at the address 
         set out in clause 5.3 and the requirements of clauses 5.3 and 5.5 have 
         been complied with.  However:

         (a)    Ecolab may in its sole discretion treat the receipt by it of 
                the Acceptance Form without some or all of the relevant 
                certificate(s) for Your Shares which are certificated or other
                documents as a valid acceptance; and

<PAGE>

         (b)    where the requirements of clauses 5.3 and 5.5 have been complied
                with in respect of some but not all of Your Shares, Ecolab may 
                in its sole discretion deem your acceptance of this Offer
                complete in respect of those Gibson Shares for which the 
                requirements have been complied with but not in respect of the 
                remainder.

- -------------------------------------------------------------------------------
6.  EFFECT OF ACCEPTANCE
- -------------------------------------------------------------------------------

6.1      By initiating acceptance of this Offer in respect of Your Shares 
         through CHESS or signing and returning an Acceptance Form to Ecolab in 
         accordance with clause 5 above, you will be deemed to have:

         (a)    irrevocably accepted this Offer in accordance with its terms in 
                respect of all Your Shares;

         (b)    subject to this Offer being declared free of the conditions set 
                out in Clause 7 below or such conditions  being fulfilled, 
                transferred Your Shares to Ecolab for the consideration in this 
                Offer;

         (c)    represented and warranted to and agreed with Ecolab that:

                (i)    on the date of registration of the transfer of Your 
                       Shares to Ecolab, Your Shares will be free from all 
                       mortgages, charges, liens and other encumbrances 
                       (whether legal or equitable) of any kind;

                (ii)   on the date of registration of the transfer of Your 
                       Fully Paid Shares to Ecolab, Your Fully Paid Shares 
                       will be fully paid up;

                (iii)  you have full right, power and authority to sell and 
                       transfer all of Your Shares to Ecolab in accordance 
                       with the terms and conditions of this Offer; and

                (iv)   if for any reason, Ecolab does not receive any 
                       certificate(s) for Your  Shares or other documents in 
                       relation to Your Shares (except for any of Your Shares 
                       which are held in uncertificated form) then you must 
                       promptly deliver to Ecolab the relevant certificate(s) 
                       and/or other documents, or acceptable evidence of loss 
                       or destruction and an acceptable indemnity in relation 
                       to those certificates and/or other documents;

         (d)    authorised Ecolab (by its officers, servants or agents) to 
                complete on the Acceptance Form correct details of Your Shares, 
                fill in any blanks remaining on the Acceptance Form and rectify 
                any error in or omission from the Acceptance Form;

         (e)    if you signed the Acceptance Form in respect of Your Shares 
                which are uncertificated and which are in a CHESS Holding, 
                authorised Ecolab (or any of its officers, servants or agents) 
                to instruct your Controlling Participant to initiate acceptance 
                of the Offer in respect of those Gibson Shares in accordance 
                with the 

<PAGE>

                SCH Business Rules and take all other steps necessary under 
                the SCH Business Rules to accept the Offer in respect of 
                Your Shares; and

         (f)    irrevocably appointed Ecolab and each director of Ecolab from 
                time to time, as your attorney for you and on your behalf to:

                (i)    requisition and/or convene (or join in requisitioning 
                       and/or convening) general meetings of Gibson in 
                       accordance with the Articles of Association of Gibson 
                       or section 246 or 247 of the Law;

                (ii)   consent to any such meetings being held on short notice;

                (iii)  attend and vote in respect of Your Shares at any and all 
                       general meetings of Gibson;

                (iv)   request Gibson prior to registering the transfer of Your 
                       Shares, to transmit Your Shares to such registers 
                       maintained by or on behalf of Gibson as Ecolab may 
                       specify; and

                (v)    execute all forms, notices, instruments (including an 
                       instrument appointing a director of Ecolab as a proxy in 
                       respect of any or all of Your Shares and any application 
                       to Gibson for a replacement certificate in respect of any
                       certificate which has been lost or destroyed) and 
                       resolutions relating to Your Shares and generally to 
                       exercise all powers and rights which you may have as the 
                       holder of those shares,

                and to have agreed that in exercising the powers conferred by 
                that power of attorney any such director will be entitled to act
                in the interests of Ecolab as the beneficial owner and intended 
                registered holder of Your Shares, provided that the appointment 
                will operate only if the contract resulting from the acceptance 
                of this Offer is or becomes unconditional.

- -------------------------------------------------------------------------------
7.  CONDITIONS OF THIS OFFER
- -------------------------------------------------------------------------------

7.1      Subject to clause 7.3, this Offer and any contract that results from 
         the acceptance of this Offer are each conditional upon:

         (a)    the Treasurer of the Commonwealth of Australia ("Treasurer") 
                consenting unconditionally to or stating prior to the end of 
                the Offer Period that he has no objection under the Commonwealth
                Government's foreign investment policy to the purchase by Ecolab
                of all Gibson Shares in accordance with the Offers or the 
                Treasurer ceases to be entitled to make an order under the 
                Foreign Acquisitions and Takeovers Act 1975 in respect of that 
                purchase;

         (b)    none of the following occurrences happening during the period 
                commencing on 29 August 1997 and ending on the expiry of the 
                Offer Period:

<PAGE>

                (i)    any one or more of the provisions of the constituent 
                       documents of Gibson or of a subsidiary of Gibson being 
                       altered in any of the ways mentioned in subsection 193(l)
                       of the Law,

                (ii)   Gibson or a subsidiary of Gibson resolving to reduce its 
                       share capital in any way;

                (iii)  Gibson or a subsidiary of Gibson:

                       (A)    entering into a buy-back agreement; or

                       (B)    resolving to approve the terms of a buy-back 
                              agreement under subsections 206D(l) or 206E(l) of 
                              the Law;

                (iv)   Gibson or a subsidiary of Gibson making an allotment of, 
                       or granting an option to subscribe for, any of its shares
                       (of any class), or agreeing to make such an allotment or 
                       grant such an option;

                (v)    Gibson or a subsidiary of Gibson issuing, or agreeing to 
                       issue, convertible notes;

                (vi)   Gibson or a subsidiary of Gibson disposing, or agreeing 
                       to dispose, of the whole, or a substantial part, of its 
                       business or property;

                (vii)  Gibson or a subsidiary of Gibson charging, or agreeing to
                       charge, the whole, or a substantial part, of its business
                       or property;

                (viii) Gibson or a subsidiary of Gibson resolving that it be 
                       wound up;

                (ix)   the appointment of a provisional liquidator of Gibson or 
                       of a subsidiary of Gibson;

                (x)    the making of an order by a court for the winding up of 
                       Gibson or of a subsidiary of Gibson;

                (xi)   an administrator of Gibson, or of a subsidiary of Gibson,
                       being appointed under sections 436A, 436B or 436C of the 
                       Law,

                (xii)  Gibson or a subsidiary of Gibson executing a deed of 
                       company arrangement; or

                (xiii) the appointment of a receiver, or a receiver and manager,
                       in relation to the whole, or a substantial part, of the 
                       property of Gibson or of a subsidiary of Gibson.

7.2      Subject to the Law, the conditions in clause 7.1 (other than the 
         condition in clause 7.1(a)) are conditions subsequent and a breach or 
         non-fulfilment of any condition set out in clause 7.1 will not prevent 
         a contract arising from acceptance of this Offer.  Those conditions 
         will not merge on completion of any contract arising from acceptance of
         this Offer and may only be relied upon by Ecolab.  The condition in

<PAGE>

         clause 7.1(a) is a condition precedent, and any contract arising from 
         acceptance of this Offer will not become binding unless and until that
         condition is fulfilled.

7.3      It is a term of this Offer that Ecolab, subject to and in accordance 
         with the Law, may declare this Offer and all other Offers made under 
         the Takeover Scheme and all contracts formed by acceptance of such 
         Offers, to be free from the conditions (or any one or more of them or 
         any part of any of them) set out in clause 7.1, other than the 
         condition in clause 7.1(a).  Any declaration made under this clause 
         7.3 must be made by Ecolab not less than 7 days before the end of the 
         Offer Period, and a notice in that respect must be published in
         accordance with the requirements of section 663 of the Law.

7.4      If at the time immediately after the end of the Offer Period in 
         respect of any condition in clause 7.1:

         (a)   Ecolab has not declared this Offer and all other Offers made by 
               Ecolab under the Takeover Scheme to be free from that condition;

         (b)   the Offers have not become free of that condition by virtue of 
               the operation of subsection 664(2) of the Law; or

         (c)   that condition has not been fulfilled;

         all contracts resulting from the acceptance of Offers and all Offers 
         that have been accepted and from whose acceptance binding contracts 
         have not yet resulted, are void.  In that event Ecolab will, if you 
         have accepted this Offer, return any Acceptance Form and other 
         documents forwarded by you, to your address as shown in the Acceptance 
         Form.

7.5      Ecolab agrees to take all reasonable steps to ensure the consent or 
         statement of no objection by the Treasurer referred to in clause 7.1(a)
         is given.

7.6      Since 29 August 1997 Gibson has declared two dividends totalling $0.50 
         per fully paid Gibson Share ("Dividends").  Whether the Dividends in 
         relation to Your Shares are to be received by you or by Ecolab will 
         depend on whether your acceptance of this Offer is received by Ecolab 
         before or after 5.00pm on Friday 31 October 1997.

         If your acceptance of this Offer is received by Ecolab before 5.00pm 
         on Friday 31 October 1997, Ecolab will be entitled to receive the 
         Dividends, in which case Ecolab will pay you $9.00 for each of Your 
         Fully Paid Shares (or $9.00 less the Unpaid Amount for each of Your 
         Partly Paid Shares),

         If your acceptance of this Offer is received by Ecolab after 5.00pm 
         on Friday 31 October 1997, you will be entitled to receive the 
         Dividends for Your Fully Paid Shares and Ecolab will pay to you $8.50 
         for each of Your Fully Paid Shares (or, in respect of Your Partly Paid 
         Shares, $9.00 per share less both the Unpaid Amount and the amount of 
         the Dividends (if any)).

<PAGE>

         There may be different taxation consequences for you depending on the 
         alternative chosen and you should consult your financial adviser as to 
         which alternative is better for you.

         If you wish to accept the Offer so as to receive the Dividends you may 
         complete the acceptance form to provide that, whatever its date, it 
         will be taken to have been received on the later of actual receipt or 
         8 November 1997.

- -------------------------------------------------------------------------------
8.  PAYMENT
- -------------------------------------------------------------------------------

8.1      If you validly accept (or are treated by Ecolab pursuant to clause 5.6 
         as having validly accepted) this Offer and:

        (a)     all of the conditions set out in clause 7.1 have been fulfilled;
                or

        (b)     Ecolab has declared the Offers constituting the Takeover Scheme 
                to be free from those conditions to the extent that they have 
                not been fulfilled,

         Ecolab will pay the consideration payable to you by cheque in 
         Australian dollars sent to you at your risk by pre-paid ordinary mail, 
         or, in the case of overseas shareholders by pre-paid airmail, to your 
         address shown on the Acceptance Form within 14 days after the Offer is 
         accepted by you or the Offer or the contract resulting from acceptance 
         of the Offer becomes unconditional, whichever is the later, but in any 
         event not later than 21 days after the end of the Offer Period.

- -------------------------------------------------------------------------------
9.  WITHDRAWAL
- -------------------------------------------------------------------------------

Subject to compliance with section 653 of the Law and any conditions imposed 
pursuant to that section, Ecolab may withdraw this Offer.

- -------------------------------------------------------------------------------
10. VARIATION OF THE OFFER
- -------------------------------------------------------------------------------

Ecolab may at any time, and from time to time, vary this Offer in accordance 
with sections 654 to 661 of the Law.

- -------------------------------------------------------------------------------
11. ADDITIONAL INFORMATION
- -------------------------------------------------------------------------------

11.1     According  to information provided by Gibson's share registry, as at 
         the date of this Offer the total number of Gibson Shares on issue is 
         22,441,126 (being 22,258,126 fully paid and 183,000 partly paid 
         shares).

<PAGE>

11.2     Immediately before this Offer was sent, Ecolab was entitled to 
         3,559,202 fully paid Gibson Shares, being approximately 15.86% of the 
         Gibson Shares on issue at that date.

11.3     The date of publication of the notice referred to in subsection 663(4) 
         of the Law is 7 November 1997, subject to variation in accordance with 
         section 663(5) of the Law if the Offer Period is extended.

11.4     All stamp duty payable on transfers of Gibson Shares in respect of 
         which Offers are accepted will be paid by Ecolab.

11.5     This Offer is accompanied by a copy of the Part A Statement.

- -------------------------------------------------------------------------------
12. NOTICES
- -------------------------------------------------------------------------------

12.1     Any notice, nomination or other communication to be given by Ecolab to 
         you under this Offer will be deemed to be duly given if it is in 
         writing and is signed or purports to be signed (whether in manuscript, 
         printed or reproduced in any form) on behalf of Ecolab by any of its 
         directors or secretaries and is delivered to or sent by post in a 
         pre-paid envelope to your address as recorded on the register of 
         members of Gibson.

12.2     Any notice or other communication given by you to Ecolab in connection 
         with this Offer will be deemed to be duly given if it is in writing and
         is sent by post to Ecolab at the following address:

         C/o Coopers & Lybrand Securities Registration Services
         Locked Bag A14
         SYDNEY SOUTH NSW 1232

         Telephone:   (02) 9285 7111
         Facsimile:   (02) 9285 5473

- -------------------------------------------------------------------------------
13.  INTERPRETATION
- -------------------------------------------------------------------------------

13.1  IN THIS OFFER:

"ACCEPTANCE FORM" means the form of acceptance and transfer enclosed with this 
Offer;

"ASX" means Australian Stock Exchange Limited;

"CHESS" means the Clearing House Electronic Subregister System operated by SCH;

"CHESS HOLDING" means a holding of Gibson Shares on the CHESS subregister of 
Gibson;

"COMMISSION" means the Australian Securities Commission;  

<PAGE>

"CONTROLLING PARTICIPANT" means the Broker or Non-Broker Participant designated 
as the controlling participant for Gibson Shares in accordance with the SCH 
Business Rules;

"DISTINCT PORTIONS" has the meaning attributed to that phrase in the Law in 
respect of Gibson Shares;

"ECOLAB" means Ecolab Australia Pty Limited ACN 079 704 939 of Level 26, 50 
Bridge Street, Sydney NSW;

"GIBSON" means Gibson Chemical Industries Limited ACN 004 494 802 of 350 
Reserve Road, Cheltenham, Victoria;

"GIBSON SHARES" means the ordinary shares of $0.50 each in Gibson on issue at 
the date the Offers are sent;

"LAW" means the Corporations Law;

"OFFER" means the offer contained in this document (or if the context so 
requires, this document itself) and "Offers" means all like offers sent to 
holders of Gibson Shares (or persons entitled to receive such Offers);

"OFFER PERIOD" means the period, referred to in clause 3, during which this 
Offer remains open for acceptance;

"PART A STATEMENT" means the Part A Statement registered in relation to the 
Takeover Scheme (a copy of which accompanies this Offer);

"RIGHTS" means all accretions and rights accrued or accruing directly or 
indirectly to the Gibson Shares at the time of and following 29 August 1997 
including, without limitation, all rights to receive dividends and to receive, 
convert to or subscribe for Gibson Shares (whether under a dividend 
reinvestment plan, option or otherwise), stock units, notes, options or other 
marketable securities, whether declared paid or issued by Gibson or otherwise;

"SCH" means the Securities Clearing House approved under the Law;

"SCH BUSINESS RULES" means the business rules of SCH from time to time;

"TAKEOVER SCHEME" means the takeover scheme constituted by the Offers for 
Gibson Shares;

"UNPAID AMOUNT" means the amount of capital (including premium) which, at the 
date of acceptance by you of the Offer, has not yet been paid on Your Partly 
Paid Share;

"YOUR FULLY PAID SHARES" means, subject to clause 4, the fully paid Gibson 
Shares in respect of which you are registered or entitled to be registered as 
holder in the register of members of Gibson;

<PAGE>

"YOUR PARTLY PAID SHARES" means, subject to clause 4, the partly paid Gibson 
Shares in respect of which you are registered or entitled to be registered as 
holder in the register of members of Gibson;

"YOUR SHARES" means Your Fully Paid Shares and Your Partly Paid Shares; and 

unless the context otherwise requires, other words and phrases used in this 
Offer have the same meaning as attributed to them by the Law or the SCH 
Business Rules, as the case may be.

13.2     Headings are for ease of reference only and do not affect the 
         interpretation of this Offer.

13.3     References to Clauses are references to clauses in this Offer.

13.4     The singular includes the plural and the plural includes the singular. 
         A reference to a person includes a reference to a corporation.

13.5     Unless otherwise indicated, a reference to "dollars" or "$" means the 
         lawful currency of the Commonwealth of Australia.

13.6     References to any law are references to that law as amended, 
         consolidated, supplemented or replaced from time to time.

13.7     References to time are references to Sydney time.


DATED    15 October 1997


SIGNED for and on behalf of            )
ECOLAB AUSTRALIA PTY LIMITED           )
by its duly authorised representative  )
in the presence of:                    )


/s/  Graham Young                      /s/  Lawrence T. Bell
- -----------------------------------    --------------------------------------
Signature of witness                   Signature of authorised representative

Graham Young                           Lawrence T. Bell
- -----------------------------------    --------------------------------------
Name of witness (please print)         Name of authorised representative 
                                       (please print)

<PAGE>

A copy of this Part A Statement has been registered by the Australian 
Securities Commission ("Commission") on 1 September 1997.  Neither the 
Commission nor any of its officers takes any responsibility as to the contents 
of this Statement.


                          PART A STATEMENT RELATING TO

                                PROPOSED OFFERS

                                       BY


                          ECOLAB AUSTRALIA PTY LIMITED
                                ACN 079 704 939


                    A WHOLLY OWNED SUBSIDIARY OF ECOLAB INC.


                               FOR ALL SHARES IN


                       GIBSON CHEMICAL INDUSTRIES LIMITED
                                ACN 004 494 802

<PAGE>

- --------------------------------------------------------------------------------
1.  INTERPRETATION
- --------------------------------------------------------------------------------

In this Statement:

"ASX" means Australian Stock Exchange Limited;

"COMMISSION" means the Australian Securities Commission;

"DOLLAR" and "$" means the lawful currency of the Commonwealth of Australia;

"ECOLAB" means Ecolab Australia Pty Limited a company incorporated in New South 
Wales having its registered office at Level 26, 50 Bridge Street, Sydney NSW 
2000;

"ECOLAB GROUP" means Ecolab Inc. of Ecolab Center, 370 Wabasha Street N., 
St Paul, MN 55102, USA and its subsidiaries;

"FULLY PAID SHARES" means the fully paid ordinary shares of 50 cents each par 
value in Gibson on issue at the date the Offers are sent;

"GIBSON" means Gibson Chemical Industries Limited ACN 004 494 802, a company 
incorporated in Victoria, having its registered office at 350 Reserve Road, 
Cheltenham, Victoria;

"GIBSON SHARES" means the Fully Paid Shares and the Partly Paid Shares;

"LAW" means the Corporations Law;

"OFFERS" means the proposed offers by Ecolab for Gibson Shares to which this
Statement relates;

"PARTLY PAID SHARES" means the partly paid ordinary shares of 50 cents each par 
value in Gibson on issue at the date the Offers are sent;

"UNPAID AMOUNT" means the amount of capital (including premium) which, at the 
date of acceptance of the Offer by the holder of a Partly Paid Share, has not 
yet been paid on that Partly Paid Share; and

words and phrases which have meanings given to them for the purposes of Chapter 
6 of the Law or in the document by which the Offers are made bear those 
meanings in this Statement.

- --------------------------------------------------------------------------------
2.  OFFERS
- --------------------------------------------------------------------------------

2.1      Ecolab proposes to dispatch Offers constituting a Takeover Scheme to 
         acquire all of the Gibson Shares for a consideration of $9.00 cash for 
         each Fully Paid Share and

<PAGE>

         $9.00 cash (less the Unpaid Amount) for each Partly Paid Share. Gibson
         shareholders may accept the Offers only in respect of all (but not some
         only) of their Fully Paid Shares and/or all (but not some only) of
         their Partly Paid Shares.

2.2      Full particulars of the Offers which Ecolab proposes to make are 
         contained in the copy of one of the proposed Offers which accompanies
         this Part A Statement, except that the following details will be 
         inserted in the relevant places in the Offers before they are sent:

         (a)    the date of the Offers;

         (b)    the date until which the Offers will remain open unless extended
                or withdrawn;

         (c)    the date upon which the notice under sub-section 663(4) of the 
                Law is to be published, and

         (d)    the number of Gibson Shares on issue and the number of those 
                shares to which Ecolab is entitled immediately before the Offers
                are sent.

- --------------------------------------------------------------------------------
3.  INTENDED OFFER PERIOD
- --------------------------------------------------------------------------------

The Offers are intended to remain open for acceptance for a period from and 
including the date of the Offers and ending at 5 pm on the date which is one 
month after the date of the Offers unless extended in accordance with their 
terms or withdrawn in accordance with the Law.

- --------------------------------------------------------------------------------
4.  DIRECTORS OF ECOLAB
- --------------------------------------------------------------------------------

The names, occupations and addresses of all of the directors of Ecolab at the 
date of this Statement are:

         David Stephen Brett, businessman, of 17 Walpole Place, Wahroonga, NSW
         Graham John Rostron Young, businessman, of 10 Wattle Street, Killara, 
         NSW
         Kenneth Allan Iverson, corporate officer, of 1565 Red Cedar Road, 
         Eagan, Minnesota, USA, and
         Lawrence Thomas Bell, corporate officer, of 351 Wyndham Circle East, 
         New Brighton, Minnesota, USA.

- --------------------------------------------------------------------------------
5.  PRINCIPAL ACTIVITIES OF ECOLAB AND ECOLAB GROUP
- --------------------------------------------------------------------------------

Ecolab has been established to act as the offeror for the Offer and has no 
other activities.  Ecolab is part of a group of companies, the ultimate parent 
of which is Ecolab Inc.  Ecolab Inc. is a company incorporated in the State of 
Delaware in the United States.

<PAGE>

The principal activities of the Ecolab Group are the development and marketing 
of premium products and services for the hospitality, institutional and 
industrial markets.  The Ecolab Group provides cleaning, sanitising, water 
care, pest elimination and maintenance products, systems and services primarily 
to hotels and restaurants, foodservice, healthcare and educational facilities, 
quickservice (fast-food units), commercial and institutional laundries, light 
industry, dairy plants and farms, and food and beverage processors.

The Ecolab Group operates directly in 30 countries in North America, Asia 
Pacific, Latin America and Africa.  In Europe, Ecolab Group operates in a joint 
venture with Henkel KGaA of Dusseldorf, Germany which does business in 23 
countries.

The Ecolab Group carries on business in Australia through Ecolab Pty Ltd, an 
Australian subsidiary of Ecolab Inc and the immediate parent company of Ecolab. 
Ecolab Pty Ltd manufactures and sells cleaning, sanitizing and maintenance 
products for the hospitality, institutional and industrial markets.  For 
hospitality and institutional customers, representative products include 
cleaners and sanitizers for dish washing, on-premise laundries, floor cleaning, 
and general housekeeping applications.  For industrial customers, 
representative products include cleaners, sanitizers and lubricants for dairy 
plants, meat and poultry plants, breweries, soft-drink bottling plants and food 
processing plants.

Ecolab Pty Ltd operates three factories in Australia, being one each in Sydney, 
Melbourne and Brisbane.  It sells product manufactured in these plants as well 
as certain products imported from Ecolab Inc.'s non-Australian plants.  Its 
principal office is in Sydney.  It has additional sales offices located in 
Melbourne, Brisbane, Perth and Adelaide.

Overall, Ecolab Pty Ltd has annual revenue of approximately $30 million and 
employs about 150 people.

For the year ended 31 December 1996, Ecolab Group reported sales of 
approximately $2 billion and, including European joint venture sales of $1.2 
billion, the global sales coverage of Ecolab Group was approximately $3.2 
billion.  Ecolab Inc. is listed on the New York Stock Exchange and the Pacific 
Stock Exchange and has a market capitalisation of approximately $3.8 billion.

- --------------------------------------------------------------------------------
6.  ECOLAB'S ENTITLEMENT TO GIBSON SHARES
- --------------------------------------------------------------------------------

6.1      Ecolab is entitled at the date of this Statement to 3,343,727 Fully 
         Paid Shares (being approximately 14.9% of all issued voting shares of
         Gibson) by reason of it being the beneficial owner of those shares.  
         The shares are registered or to be registered as follows:

         NAME OF HOLDER                                              NUMBER HELD

         Graham J R Young                                                    100
         Brispot Nominees Pty Ltd                                      3,343,627

6.2      Ecolab is not entitled to any other marketable securities of Gibson.

<PAGE>

- --------------------------------------------------------------------------------
7.  TRANSACTIONS IN GIBSON BY ECOLAB OR ITS ASSOCIATES DURING PREVIOUS FOUR 
    MONTHS AND TRANSACTIONS IN ECOLAB
- --------------------------------------------------------------------------------

7.1      During the four months immediately preceding the date on which this 
         Statement is lodged for registration with the Commission, the only 
         acquisitions or disposals of Gibson Shares by Ecolab or any associate 
         of Ecolab were the following:

         ACQUISITIONS OF FULLY PAID SHARES ON AUSTRALIAN STOCK EXCHANGE LIMITED

              DATE                     QUANTITY            PRICE PER SHARE

              18 August 1997            249,890            $7.10

              20 August 1997          3,093,737            $8.00

              DISPOSALS

              None.

7.2      The only acquisitions or disposals of shares in Ecolab made by Ecolab 
         or its associates during the four months immediately preceding the date
         on which this Statement is lodged for registration with the Commission 
         were that Ecolab Pty Ltd subscribed for two fully paid ordinary shares 
         in Ecolab on 22 August 1997 at a price of $1.00 per share.

         The two subscriber shares in Ecolab, held by its incorporators, were 
         redeemed on the same day.

- --------------------------------------------------------------------------------
8.  NO PRE-EMPTION CLAUSE
- --------------------------------------------------------------------------------

As far as Ecolab is aware, the constituent documents of Gibson are its 
Memorandum and Articles of Association.  They contain no restriction on the 
right to transfer Gibson Shares that has the effect of requiring the holders of 
Gibson Shares, before transferring them, to offer them for purchase to the 
members of Gibson or to any other person.

- --------------------------------------------------------------------------------
9.  HOW CASH CONSIDERATION TO BE PROVIDED
- --------------------------------------------------------------------------------

The maximum cash amount that would be required if all the Offers for all Gibson 
Shares were accepted is $200,270,106.50.

<PAGE>

Ecolab Inc. has irrevocably and unconditionally undertaken to Ecolab that it 
will make available to Ecolab all necessary funds to acquire all Gibson Shares. 
Ecolab Inc. has existing unutilised committed credit lines of US$225 million 
under a Multicurrency Credit Agreement with a group of seven banks, led by 
Citibank, N.A. (as agent) and Morgan Guaranty Trust Company of New York (as 
co-agent) further details of which are specified in Annexure K. The only 
conditions precedent to the availability of funds under this Multicurrency 
Credit Agreement are those which typically apply to facilities of this kind, 
including:

         (a)    the payment of fees and execution of facility documents by 
                Ecolab Inc. and its subsidiaries;

         (b)    that certain representations and warranties as to the affairs 
                and status of Ecolab Inc. and its subsidiaries are and remain 
                correct; and

         (c)    that no specified events of default by Ecolab Inc. or its 
                subsidiaries have occurred.

The conditions precedent for this facility are summarised in Annexure L.

Ecolab believes that all relevant conditions precedent will be satisfied at the 
time it will require funding from Ecolab Inc. as described above.

The US$225 million credit line will be sufficient to cover the maximum cash 
amount for the Offers provided that the exchange rate for an A$1.00 does not 
increase above approximately US$1.12. (As at 29 August 1997, the exchange rate 
for an A$1.00 was approximately US$0.74). However, Ecolab Inc is considering 
entering into a A$-denominated credit line with Citibank N.A.  In this case, 
Ecolab Inc would make available the funds under that credit line to Ecolab on 
request.  If such a credit line is entered into, it will not affect the 
availability of funds under the Multicurrency Credit Agreement.

In addition, Ecolab Pty Ltd, which holds all the shares of Ecolab, has entered 
into a committed loan agreement with Citibank, N.A. for $40 million, which 
funds Ecolab Pty Ltd has unconditionally agreed to provide as capital to Ecolab 
(in the form of 100,000 $1.00 ordinary shares to be issued at a premium of 
$99.00 each and 3 million redeemable preference shares to be issued at a 
premium of $9.99 each ) to acquire Gibson Shares, on request.  The terms of the 
redeemable preference shares are set out in Annexure M. Ecolab Inc. has 
guaranteed to Citibank, N.A. the repayment of that loan.  The only conditions 
precedent to the availability of funds under this committed loan agreement are 
those which typically apply to facilities of this kind including:

         (a)    that certain representations and warranties as to the affairs 
                and status of Ecolab Pty Ltd and its subsidiaries are and remain
                correct; and

         (b)    that no specified events of default by Ecolab Pty Ltd or by the 
                Ecolab Group have occurred.

The conditions precedent for this facility are summarised in Annexure N.

Ecolab believes that all relevant conditions precedent will be satisfied at the 
time it will require capital funding from Ecolab Pty Ltd as described above.

<PAGE>

Ecolab expects that its funding requirements initially will be provided to it 
by Ecolab Pty Ltd in the manner and from the facility described above.

- --------------------------------------------------------------------------------
10. NO BENEFITS TO OFFICERS OF GIBSON
- --------------------------------------------------------------------------------

Ecolab does not propose in connection with the Offers that:

         (a)    a benefit (being a prescribed benefit for the purposes of the 
                Law) other than an excluded benefit within the meaning of the 
                Law will or may be given to a person in connection with the
                retirement of a person from an office that, in relation to 
                Gibson, is a prescribed office for the purpose of the Law; and 

         (b)    a benefit (being a prescribed benefit for the purpose of the 
                Law) will or may be given to a person, who in relation to Gibson
                would be a prescribed person for the purpose of the Law, in 
                connection with the transfer of the whole or any part of the 
                undertaking or property of Gibson.

- --------------------------------------------------------------------------------
11.  NO AGREEMENT BETWEEN ECOLAB AND THE DIRECTORS OF GIBSON
- --------------------------------------------------------------------------------

There is no agreement between Ecolab and any of the directors of Gibson in 
connection with, or conditional upon, the outcome of the Takeover Scheme.

- --------------------------------------------------------------------------------
12.  CHANGE IN FINANCIAL POSITION OF GIBSON
- --------------------------------------------------------------------------------

So far as is known to Ecolab the only changes in the financial position of 
Gibson since 30 June 1996 (being the date of the last balance sheet laid before 
Gibson in general meeting) are as announced to ASX.  Copies of all 
announcements to the ASX which reflect changes to the financial position of 
Gibson since the balance date for the accounts for the year ended 30 June 1996 
are attached.

In summary, the announcements were:

         (a)    NEW CHAIRMAN-ELECT - 8 JULY 1996 (ANNEXURE A)

                Mr Richard F E Warburton was appointed as Chairman-elect to 
                succeed Mr F C Lawson.

         (b)    FINANCIAL AND STATUTORY REPORTS FOR THE YEAR ENDED 30 JUNE 
                1996 - 11 SEPTEMBER 1996

                These financial statements and reports relate to the period up 
                to 30 June 1996 (and for this reason have not been attached to 
                this Part A Statement), except that they 

<PAGE>

                disclose that a fully franked final dividend of 14.0 cents per 
                share was declared for 1996, to be paid on 13 November 1996.

         (c)    NOTICE OF ANNUAL GENERAL MEETING - 23 OCTOBER 1996 (ANNEXURE B)

                An Employee Share Acquisition Plan was proposed to be 
                established, under which Gibson Shares could be issued to
                employees, including certain executive directors of Gibson.

         (d)    PURITAN/CHURCHILL CHEMICAL COMPANY - 22 OCTOBER 1996 
                (ANNEXURE C)

                A US subsidiary of Gibson, Puritan/Churchill Chemical Company, 
                agreed to sell and license to S.C. Johnson & Son, Inc. its range
                of retail products sold predominantly to supermarkets for
                in-store cleaning and sanitising.  The sale proceeds will be 
                used for growth in the Gibson group.

         (e)    RESIGNATION OF DIRECTOR - 6 NOVEMBER 1996 (ANNEXURE D)

                Mr Tom Reynolds resigned as a director of Gibson.

         (f)    ADDRESS TO ANNUAL GENERAL MEETING - 13 NOVEMBER 1996 (WITH 
                ADDENDUM DATED 14 NOVEMBER 1996) (ANNEXURE E)

                The Group Managing Director discussed the group's performance 
                for the year ended 30 June 1996 and announced that competition 
                continued to be intense in all of Gibson's major markets. 
                Management of some businesses had been reviewed and changed.

                The group's financial position continued to be sound.  Sales for
                the first quarter of the 1996/1997 financial year showed an 
                increase over the previous year, although profits were 
                marginally down.

                The pre-tax profit on the sale of the retail business of 
                Puritan/Churchill Chemical Company would be approximately
                $11,000,000.

         (g)    RETIREMENT OF DIRECTORS - 14 NOVEMBER 1996 (ANNEXURE F)

                Mr Francis C Lawson and Mr David H Hume retired as directors 
                of Gibson.

         (h)    NEW CHAIRMAN AND RETIREMENT OF DIRECTOR - 18 NOVEMBER 1996 
                (ANNEXURE G)

                Mr Richard F E Warburton was appointed Chairman of the Board of 
                Directors following the retirement of Mr F C Lawson.

         (i)    JOINT VENTURE - CHEMETALL GMBH - 19 FEBRUARY 1997 (ANNEXURE H)

                A subsidiary of Gibson entered into a joint venture with 
                Chemetall GmbH for the manufacture of chemicals used in 
                preparing metal and plastic surfaces for final coating.

<PAGE>

         (j)    HALF-YEARLY ANNOUNCEMENT TO 31 DECEMBER 1996 - 13 MARCH 1997 
                (ANNEXURE I)

                Compared with the previous corresponding period, sales were up 
                6.3% to $84,038,000, operating profit before abnormal items and 
                tax was down 4.8% to $7,521,000, and operating profit after tax 
                attributable to members was up 166.9% to $13,124,000.

                The major impact on the group's results during the half year was
                the sale of part of the business of Puritan/Churchill Chemical 
                Company, resulting in an abnormal profit before tax of 
                $13,582,000.

                A fully franked interim dividend of 14.0 cents per share was 
                declared to be paid on 7 May 1997.

         (k)    ACQUISITION OF INTERGRAIN TIMBER FINISHES PTY LTD - 4 JULY 1997 
                (ANNEXURE J)

                A subsidiary of Gibson purchased Intergrain Timber Finishes Pty 
                Ltd for an undisclosed price.  The company manufactures high 
                quality water-based timber finishes.

- --------------------------------------------------------------------------------
13.  NO AGREEMENTS RELATING TO TRANSFER OF GIBSON SHARES BY ECOLAB
- --------------------------------------------------------------------------------

There is no present agreement, arrangement or understanding whereby any Gibson 
Shares acquired by Ecolab pursuant to the Offers will or may be transferred to 
any other person.

- --------------------------------------------------------------------------------
14.  NO ESCALATION AGREEMENT
- --------------------------------------------------------------------------------

There is no agreement, arrangement or understanding for the acquisition of 
Gibson Shares by Ecolab or by a person associated with Ecolab (within the 
meaning of Section 609 of the Law) being an agreement, arrangement or 
understanding under which the person or either or any of the persons from whom 
Gibson Shares have been or are to be acquired or an associate of that person or 
of either or any of those persons may, at any time after an Offer is sent, 
become entitled to any benefit, whether by way of receiving an increased price 
for those Gibson Shares or by payment of cash or otherwise, that is related to, 
dependent upon, or calculated in any way by reference to the consideration 
payable for Gibson Shares acquired after the agreement, arrangement or 
understanding was entered into.

<PAGE>

- --------------------------------------------------------------------------------
15.  ECOLAB'S PRESENT INTENTIONS ABOUT BUSINESS, ASSETS AND EMPLOYEES OF GIBSON
- --------------------------------------------------------------------------------

15.1     UPON ACQUISITION OF ALL VOTING SHARES OF GIBSON

Subject to the terms of the Offer, Ecolab seeks to acquire all voting shares of 
Gibson.  The following outlines its intention if this occurs.

An internal management presentation given to the board of Ecolab Inc in August 
1997 (the "Presentation") presented this acquisition as the single largest 
international opportunity in Ecolab's core businesses outside of Japan.

Ecolab or the Ecolab Group will, in the ordinary course of its management, 
fully review the business, assets and organisation of Gibson to evaluate 
performance, profitability and prospects in the light of information then 
available to it. This review will also focus on identifying opportunities to 
eliminate duplication of functions between Gibson and other companies in the 
Ecolab Group, and improve productivity and competitiveness of Gibson's business.

Ecolab is not presently in a position to speculate as to the outcome of that 
review, and has not formed any intentions as to the actions it may take as a 
consequence of it, except as set out below.

It is Ecolab's present intention, subject to the above review and subject as 
otherwise referred to below, to:

         (a)    continue the business of Gibson generally without making any 
                major changes to the business or redeploying Gibson's fixed 
                assets;

         (b)    to the extent possible (having regard to legal obligations and 
                market conditions), quickly combine the operational activities 
                of Ecolab Pty Ltd and Gibson, subject to the review referred to 
                above, this may lead to the sale of surplus facilities and real
                estate, of Gibson and/or Ecolab;

         (c)    eliminate some duplication of functions arising as a result of 
                the acquisition of Gibson.  The key areas of duplication are 
                expected to arise in the corporate office functions of Gibson 
                such as administration, finance and public company compliance 
                and reporting functions, and may arise in the manufacturing, 
                marketing, distribution, logistics and R & D functions.  The 
                Presentation recommended that Ecolab should move decisively to 
                cut costs.

In regard to paragraphs (b) and (c) above, the Presentation forecast that 
revenues of Gibson could be static in the first year after acquisition and 
then, under Ecolab's management and guidance, and with its assistance, could 
grow by 7.5% per year for each of the next two years, with operating income in 
the range of 10% to 14% of revenues each year, and that total synergies of 
approximately US$10.7 million (approximately A$14.3 million), being 9% of 
revenue, could be achieved over two years post-acquisition.  The Presentation 
took the

<PAGE>

position that synergy benefits could be found in the following areas, namely, 
personnel (US$6.3 million), office/facilities (US$0.8 million), 
materials/manufacturing (US$1.2 million), freight/warehouse (US$l million), 
public company costs (US$0.5 million) and other areas (US$0.9 million).

These forecasts are preliminary, are based on limited information, and will be 
reviewed in the course of the full review referred to above.

The Presentation also identified "the primary business risks associated with 
the transaction:

   -     Achieving forecast sales growth

   -     Achieving forecast synergies

   -     Successfully leveraging our leading position in Australia/New Zealand 
         as a platform for further development of Southeast Asia

   -     Risk of being trapped with a minority shareholding in the unlikely 
         event that the tender offer fails and no rival bidder emerges".

Ecolab's present intentions (as outlined immediately above) are founded on 
Ecolab's current belief, based on detailed analysis of the information publicly 
available and its general knowledge of the industry in which Gibson operates. 
In particular, Ecolab believes that Gibson represents a tight strategic fit 
with Ecolab, in relation to geographical coverage and on lines of business.

The table below shows the complementary strengths of Ecolab and Gibson which 
Ecolab believes could result in additional customer opportunities:

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------
                             ECOLAB                 GCI               BENEFIT
- -------------------------------------------------------------------------------------------
<S>                       <C>                    <C>               <C>
Positioning               Quality                Quality           Consistent
- -------------------------------------------------------------------------------------------
Pricing                   Premium                Premium           Strong Margins
- -------------------------------------------------------------------------------------------
Market Sector Strength    Hotel/Restaurants      Health Care       Leverage Ecolab
                                                                   Offerings in Healthcare
- -------------------------------------------------------------------------------------------
Product Line Strength     Warewashing Laundry    Hand Care         Cross-Selling
                                                 Disinfectants     Opportunities
- -------------------------------------------------------------------------------------------
Geographical Strength     New South Wales        Victoria          Complementary 
                                                                   Market Coverage
- -------------------------------------------------------------------------------------------
</TABLE>

In terms of geography in Australia, for example, the focus of Ecolab Pty Ltd is 
in New South Wales and Ecolab understands that the focus of Gibson is in 
Victoria.  In the Pacific region, Ecolab expects that the acquisition of Gibson 
will significantly increase the size of the Ecolab Group's New Zealand 
operations as well as to expand the overall scale and resources of the Ecolab 
Group's operations in the region.  The Presentation said that the acquisition 
of Gibson would be a solid base for further development of Southeast Asia.  
Ecolab is also considering establishing its South-east Asian Regional 
Headquarters in Australia.

<PAGE>

In terms of business, the 1996 annual report for Gibson indicates that it has 
six business groups:

         (a)    maintenance chemicals (including hospitality, laundry and health
                care markets);

         (b)    water treatment (including commercial water treatment, 
                industrial water treatment and process chemicals divisions);

         (c)    automotive (specialty sealants);

         (d)    thermochemical (steel making processes);

         (e)    biological; and 

         (f)    retail (branded products sold through a network of distributors 
                and retailers).

The Ecolab Group operates in similar business areas to those outlined in 
paragraphs (a), (b) and (e) above.  The business areas referred to in 
paragraphs (c), (d) and (f) have been identified by Ecolab as "non-core" and, 
in the review referred to above, will be evaluated and, if indicated, 
considered for divestiture. The Presentation took the position that, if a 
decision were to subsequently be made to divest any business identified as 
"non-core", segregating that business from Gibson's other businesses should be 
relatively easy. Ecolab understands that the non-core businesses in aggregate 
account for 25% of Gibson's revenue.

Ecolab's present expectation is that Gibson's people, products and geographical 
coverage will complement the business of Ecolab Pty Ltd and enable Ecolab Pty 
Ltd and Gibson to strengthen service to their customers.

Ecolab understands that Gibson carries on business activities in Australia, New 
Zealand, South-east Asia, the United Kingdom and the United States of America. 
If the Offer is successful, Ecolab presently intends that, if possible and 
subject to agreement with Henkel, it would cause Gibson to transfer its shares 
in the company carrying on the United Kingdom business to the Henkel-Ecolab 
joint venture (referred to in paragraph 5 above) at an arm's length cash price, 
which moneys would be used for Gibson's working capital.  Ecolab understands 
that Gibson's United Kingdom business accounts for approximately 7% of Gibson's 
annual revenue.  Ecolab presently intends, pending review, that it will not 
cause Gibson to divest any other subsidiaries of Gibson.

A factor influencing Ecolab's take-over offer is its view that there is scope 
for significant improvements in efficiency and reduction of costs to result 
from the integration of business referred to above.  This is likely to result 
in some redundancies in employment.  The Presentation anticipated that this 
would represent about 150 of Gibson's approximately 1,000 employees. The result 
is that Ecolab presently intends to continue the employment of most of Gibson's 
employees.  Where Ecolab's review of the areas in which there is a duplication 
of functions identifies positions that are no longer required, the Ecolab Group 
will endeavour to offer suitable alternative employment to the affected 
employees.  If suitable alternative employment is not available, then any 
affected employees may be made redundant and Ecolab will ensure that those 
employees are compensated for all applicable contractual, award and legislative 
entitlements.

<PAGE>

The above intentions have been formed on the basis of limited information and 
without the benefit of any detailed review of Gibson's businesses.  Following 
the review described above, it will be a matter for the Board of Gibson to 
determine the extent to which the actions referred to above are to be 
implemented (if at all).

15.2     UPON ACQUISITION OF A MAJORITY BUT NOT ALL VOTING SHARES OF GIBSON

Ecolab believes the intended review and action detailed in 15.1 to be in the 
best interests of Gibson.  Ecolab presently intends that, in the event that 
Ecolab acquires more than 50%, but less than all, of the voting shares of 
Gibson, it will take all steps available to it to cause Gibson to implement 
that review and action to the maximum extent possible having regard to the 
legitimate interests of minority shareholders.

15.3     UPON ACQUISITION OF ONLY A MINORITY OF VOTING SHARES OF GIBSON

If the Offer closes and Ecolab remains a minority shareholder of Gibson, Ecolab 
may seek representation on the board of Gibson, pending review at that time.

15.4     BOARD OF DIRECTORS OF GIBSON

If Ecolab acquires more than 50% of the voting shares of Gibson, it is the 
present intention of Ecolab that the board of directors of Gibson should be 
reconstituted such that a majority of the board of Gibson would comprise 
nominees of Ecolab.  Ecolab expects that it will be necessary to seek the 
removal of most of the current board to achieve this outcome.

15.5     COMPULSORY ACQUISITION AND DELISTING

If it becomes entitled to do so under the Law, Ecolab intends to utilise the 
compulsory acquisition procedures under the Law to acquire all outstanding 
Gibson Shares.

If it becomes necessary to do so, Ecolab intends to facilitate compulsory 
acquisition by seeking a modification of the Law from the Commission.  The form 
of modification sought will be in accordance with the Commission's published 
policy, and will (if granted) allow Ecolab to disregard certain Gibson 
shareholders (such as those who remain untraceable despite Ecolab's reasonable 
efforts to locate them) when calculating whether three quarters of them by 
number have disposed of their Gibson Shares to Ecolab or have ceased to be 
registered as the holders of Gibson Shares.

If following the Offers, the number of holders of Gibson Shares and the size of 
their shareholdings does not meet the requirements for Gibson to maintain its 
listing on ASX, Ecolab will seek the delisting of Gibson.

- --------------------------------------------------------------------------------
16.  OTHER MATERIAL INFORMATION
- --------------------------------------------------------------------------------

The largest shareholder in Ecolab Inc. is Henkel.  Henkel and its affiliates 
own approximately 23.9% of Ecolab Inc.'s voting shares.  Henkel is a German 
chemical company and one of the world's major producers of oleochemicals 
(compounds used in soaps, cosmetics and

<PAGE>

detergents) and metal surface treatments.  Henkel's share ownership in Ecolab 
Inc. is subject to a stockholder's agreement containing certain restrictions 
pertaining to, among other things, maximum stockholding, transfer and voting 
rights.  Pursuant to the stockholder's agreement, Henkel is precluded from 
acquiring more than 26% of Ecolab Inc.'s issued shares prior to 11 July 2000 
and 30% thereafter through the period of the stockholder's agreement (which 
runs to 26 June 2009) or from acting alone or in concert with others to control 
or influence Ecolab Inc.  In general, Henkel has agreed to vote its shares in 
accordance with the recommendations or directions of Ecolab Inc.'s Board of 
Directors or pro rata in the same manner and proportion that votes of the other 
shareholders of Ecolab Inc. (other than Henkel and officers and directors of 
Ecolab Inc.) have been cast.  However, any vote with respect to transactions 
which could have a material effect upon Henkel's investment including 
dispositions, recapitalizations and dissolutions of Ecolab Inc., may be cast at 
Henkel's sole discretion.  Henkel also is entitled to designate nominees for 
election to the Board of Directors proportionate to the percentage of its 
holding of shares in Ecolab Inc. (rounded to the nearest whole number). 
Currently, Henkel has designated for election three of Ecolab Inc.'s thirteen 
directors.

No vote of the Ecolab Inc.'s stockholders is required in connection with the 
Offers.

Henkel controls the day-to-day operations of the Henkel-Ecolab European joint 
venture.  Henkel has its own operations in Australia which compete directly 
with part of the operations of the Gibson group but which do not compete with 
Ecolab Pty Ltd's operations.

There is no agreement, arrangement or understanding between Henkel and the 
Ecolab Group for Ecolab to cause the sale of any business unit of Gibson to 
Henkel nor does Ecolab have any present intention to do so.

Ecolab understands, from Gibson, that in February 1997 Gibson commenced a joint 
venture with Chemetall GmbH, a German company and major worldwide competitor of 
Henkel (see Annexure H).  Ecolab is not in possession of any information that 
permits it to determine the impact of a successful offer on this joint venture, 
except that, Ecolab has been informed by Gibson that Chemetall has rights under 
the joint venture to terminate it upon a change in shareholding in Gibson, and 
that it is extremely probable that Chemetall will exercise those rights if 
Ecolab acquires an unspecified quantity of shares of Gibson.

Ecolab has obtained a modification of section 634 of the Corporations Law from 
the Commission to allow the Offer to be for both Fully Paid Shares and Partly 
Paid Shares.  Without this modification, Ecolab would have been required to 
make separate offers for the Fully Paid Shares and the Partly Paid Shares.  The 
modification is in accordance with the Commission's published standard form of 
relief and is attached as Annexure O.

There is no other information material to the making of a decision by a holder 
of Gibson Shares whether or not to accept the Offer, being information that is 
known to Ecolab and which has not previously been disclosed to holders of 
shares in Gibson, except as contained elsewhere in this Statement.

DATED 29 August 1997.

<PAGE>

SIGNED by Lawrence T Bell and Graham J R Young, directors of Ecolab, authorised 
to sign this Statement pursuant to a resolution passed at a meeting of the 
directors of Ecolab held on 28 August, 1997.

/s/ Lawrence T. Bell                   /s/ Graham Young 
- ----------------------------------     ----------------------------------------
Director                               Director

<PAGE>
- -------------------------------------------------------------------------------
                                PART B STATEMENT
- -------------------------------------------------------------------------------

PART B STATEMENT BY GIBSON CHEMICAL INDUSTRIES LIMITED (ACN 004 494 802)
        PURSUANT TO PARTS 6.4 AND 6.12 OF THE CORPORATIONS LAW


This Part B Statement issued by Gibson Chemical Industries Limited (ACN 004 494
802) (GIBSON) is in respect of offers (OFFERS) for the acquisition of Gibson
Shares made by Ecolab Australia Pty Ltd (ECOLAB) dated 15 October 1997 and to 
which the Part A Statement of Ecolab dated 29 August 1997 relates.

1.       DIRECTORS

         The names, occupations and addresses of the directors of Gibson are 
         as follows:

NAME                   OCCUPATION  ADDRESS

Richard F E Warburton  Chairman    17a Macquarie Road, Pymble, New South Wales

Robert F Ooms          Managing    75 Pymble Avenue, Pymble, New South Wales
                       Director

Geoffrey D W Curlewis  Director    106-110 Belgrave Hallam Road, Hallam,
                                   Victoria

William L Morton       Director    5 Gordon Crescent, Blackburn, Victoria

Ian T Perkins          Director    26 Duffy Street, Portsea, Victoria

Douglas J Rathbone     Director    38 Edward Street, Essendon, Victoria

2.       DIRECTORS' RECOMMENDATION 

         Each of the directors of Gibson:

              (a)  desires to make, and considers himself justified in making, a
                   recommendation in relation to the Offers; and

              (b)  recommends, in the absence of a superior offer, acceptance of
                   the Offers.

<PAGE>

3.       REASONS FOR RECOMMENDATION

         Each director of Gibson who recommends acceptance of the Offers does 
         so for the following reasons:

             (a)  the independent expert's report by Grant Samuel and Associates
                  Pty Limited indicates that the price offered by Ecolab is both
                  fair and reasonable;

             (b)  it is unlikely that an alternative higher offer will be made
                  for Gibson Shares;

             (c)  the offer price is in line with acceptable acquisition and
                  trading multiples;

             (d)  the offer by Ecolab permits shareholders to accept either
                  $9.00 in cash or $8.50 plus a fifty cent fully franked
                  dividend; and

             (e)  the shareholders have the opportunity to receive cash for
                  their Gibson Shares.

4.       MARKETABLE SECURITIES OF GIBSON TO WHICH EACH DIRECTOR OF GIBSON IS
         ENTITLED

         The number, description and amount of marketable securities of 
         Gibson to which each director of Gibson is entitled are as follows:

DIRECTOR               FULLY PAID ORDINARY SHARES OF 50  PARTLY PAID SHARES OF
                       CENTS EACH IN GIBSON              50 CENTS EACH IN
                                                         GIBSON (1)

Richard F E Warburton  3,000(2)                          -

Robert F Ooms          31,412                            120,000

Geoffrey D W Curlweis  2,000                             -

William L Morton       23,621                            -

Ian T Perkins          2,000                             -

Douglas J Rathbone     1,000                             -


(1)    In 1988, Gibson established an Executive Share Option Plan (OPTION PLAN).
       Under the terms of the Option Plan, certain employees were invited to
       subscribe for options.  The final date for

<PAGE>

       exercising these options was 9 March 1993.  The exercise price (being a
       weighted average of the share price when the option was granted) was
       required to be paid as to one cent upon exercise.   The balance of the
       exercise price is payable at any time within five years from the date the
       options were exercised.

(2)    Registered holder is Teampass Pty Ltd.

5.       INTENTIONS OF GIBSON DIRECTORS

         Each director of Gibson intends to accept the Offers in respect of
         Gibson Shares held by him or on his behalf.

6.       RESOLUTION AUTHORISING PART B STATEMENT

         No director of Gibson voted against the resolution authorising this
         Part B Statement at a meeting of the directors held on 16 October 1997.

7.       MARKETABLE SECURITIES OF ECOLAB TO WHICH EACH DIRECTOR OF GIBSON IS
         ENTITLED

         No director of Gibson is entitled to marketable securities of Ecolab.

8.       DEALING IN SHARES OF ECOLAB BY GIBSON AND ITS ASSOCIATES OVER PAST FOUR
         MONTHS

         In the four months ending on the day immediately before the day on
         which the Part A Statement relating to the Offers was served on Gibson,
         there have been no acquisitions or disposals of shares in Ecolab by
         Gibson or any associate of Gibson.

9.       DEALINGS IN SHARES OF GIBSON BY ANY ASSOCIATE OF GIBSON OVER THE PAST
         FOUR MONTHS

         In the four months ending on the day immediately before the day on
         which the Part A Statement relating to the Offers was served on Gibson,
         there have been no acquisitions or disposals of shares in Gibson by any
         associate of Gibson other than the following:

              -    on 22 August 1997, Singapore Investments Pty Ltd, trustee of
                   the Alan Bennett Executive Superannuation Fund, acquired
                   2,200 ordinary Gibson shares at $8.05 per

<PAGE>

                   share.  Alan Bennett is a director of certain wholly owned
                   subsidiaries of Gibson and a director of Gibson Chemetall
                   Pty Ltd. 

10.      PROPOSED BENEFITS TO OFFICERS OF GIBSON

10.1     No prescribed benefit (other than an excluded benefit) will or may be
         given to a person in connection with the retirement of a person from
         a prescribed office in relation to Gibson other than as follows:

         -    In accordance with a resolution passed by shareholders of Gibson
              on 12 November 1980, Gibson established a fund to provide
              retirement benefits for non-executive directors (RETIREMENT FUND).
              These benefits, payable on retirement, are calculated by applying
              a multiple to the average of the highest three consecutive years' 
              Directors' fees out of the ten years preceding retirement.  Under
              the terms of the Retirement Fund, Mr W L Morton will receive a
              prescribed benefit (other than an excluded benefit) when he
              retires.  If Mr W L Morton retired at 30 June 1997, the amount he
              would have received under the Retirement Fund would have been
              $120,769.

10.2     No prescribed benefit will or may be given to a prescribed person in
         relation to Gibson in connection with the transfer of the whole or any
         part of the undertaking or property of Gibson.

11.      AGREEMENTS BY DIRECTORS OF GIBSON

         There are no agreements between any director of Gibson and any other
         person in connection with or conditional upon the outcome of the 
         Offers, other than as follows: Gibson has agreed that the Gibson 
         Board will appoint persons nominated by Ecolab to be a majority 
         of directors of Gibson if so requested by Ecolab at any time 
         after Ecolab is entitled to more than 50% of Gibson shares and 
         the offer is unconditional.

12.      INTERESTS OF DIRECTORS OF GIBSON IN ANY CONTRACT ENTERED INTO BY ECOLAB

         No director of Gibson has an interest in any contract entered into by
         Ecolab.

<PAGE>

13.      CHANGES IN GIBSON'S FINANCIAL POSITION

         So far as is known to the directors of Gibson, the financial position
         of Gibson has not materially changed since 30 June 1997 (being 
         the date of the last balance sheet sent to shareholders in 
         accordance with section 315 of the Corporations Law).

14.      OTHER INFORMATION

14.1     EXPERT'S REPORT

         Attached is an expert's report by Grant Samuel and Associates Pty
         Limited.  This report forms part of the Part B Statement.  The report
         concludes that the offer by Ecolab is both fair and reasonable.  Grant
         Samuel and Associates Pty Limited consents to the inclusion of the
         report in the form and context in which it is included.

14.2     GIBSON CHEMETALL PTY LTD

         On 19 February 1997, Gibson announced the commencement of a joint 
         venture between its Australian subsidiary, Gibson Chemicals 
         Limited, and Chemetall GmbH (CHEMETALL). Chemetall is a major 
         German chemical manufacturer. The joint venture is carried on 
         through a company established for the joint venture, Gibson 
         Chemetall Pty Ltd.  Fifty per cent of the shares in Gibson 
         Chemetall Pty Ltd are owned by Gibson Chemicals Limited and fifty per
         cent of the shares in Gibson Chemetall Pty Ltd are owned by 
         Chemetall.

         The joint venture is the subject of an agreement between Gibson
         Chemicals Limited, Chemetall and Gibson Chemetall Pty Ltd (JOINT
         VENTURE AGREEMENT). There are provisions in the Joint 
         Venture Agreement relating to a change of control of either 
         Gibson Chemicals Limited or Chemetall.  The effect of those 
         provisions is that, in the event that Ecolab attains control of 
         Gibson (and so attains control of Gibson Chemicals Limited),      
         Chemetall would have the right to purchase all of the shares in 
         Gibson Chemetall Pty Ltd held by Gibson Chemicals Ltd if Ecolab 
         is engaged in any activities competitive to those of Chemetall 
         or Gibson Chemetall Pty Ltd.

         Although Gibson has not discussed with Chemetall whether Chemetall 
         will or may exercise its rights under these "change of control" 
         provisions, Gibson believes that should Gibson become controlled 
         by Ecolab, it is likely that, if entitled to, Chemetall will 
         seek to exercise those rights and acquire the shares in Gibson 
         Chemetall Pty Ltd held by Gibson Chemicals Limited.

<PAGE>

14.3     EXECUTIVE SHARE OPTION PLAN

         Under paragraph 9(b) of Gibson's Option Plan (discussed above), until
         the partly-paid shares issued as a result of the exercise of options 
         under the Option Plan are fully paid, those shares are not 
         transferable without the consent of the Gibson Board of Directors 
         unless a take-over offer (which is unconditional or conditional only 
         on "prescribed occurrences") is made for all or a proportion of 
         Gibson's shares.

         The Board does not intend to withhold its consent should a holder of 
         partly-paid shares wish to accept the Offer and transfer his or her 
         partly-paid shares to Ecolab.

14.4     OTHER MATERIAL INFORMATION

         There is no other information material to the making of a decision by 
         a holder of shares in Gibson whether or not to accept Ecolab's offer 
         (being information that is known to any of the directors of Gibson 
         which has not previously been disclosed to holders of shares in 
         Gibson) other than as disclosed in the Part A Statement or as is 
         contained elsewhere in this Statement or the documents accompanying 
         this Statement.

15.      INTERPRETATION

15.1     Definitions

         In this Statement:

         ECOLAB means Ecolab Australia Pty Ltd (ACN 079 704 939).  

         GIBSON SHARES means:

               (a)  the fully paid ordinary shares of 50 cents each in the
                    capital of Gibson; and

               (b)  the partly-paid ordinary shares of 50 cents each in the
                    capital of Gibson issued upon the exercise of options under
                    Gibson's Executive Share Option Plan.

         PART A STATEMENT means the Part A Statement dated 29 August 1997 given 
         by Ecolab to Gibson on 2 September 1997, as varied in accordance 
         with a declaration of the Australian Securities Commission dated 23 
         September 1997 (that declaration being varied by the Australian 
         Securities Commission by exemptions dated 3 October 1997 and 14  
         October 1997).

<PAGE>

Words and phrases not otherwise defined have the same meaning (if
any) given in the Corporations Law.

DATED            16 OCTOBER 1997.


SIGNED on behalf of Gibson by Richard F E Warburton and Robert F Ooms who are 
two directors of Gibson and are autborised to sign this Statement 
pursuant to a resolution passed at a meeting of the directors of 
Gibson held on 16 October 1997.

/s/Richard F E Warburton                      /s/Robert F Ooms 
- -----------------------------------           ---------------------------------
RICHARD F E WARBURTON                         ROBERT F OOMS
Chairman                                      Managing Director


<PAGE>
THIS IS AN IMPORTANT DOCUMENT.  IF YOU ARE IN ANY DOUBT AS TO HOW TO DEAL WITH
 IT, PLEASE CONSULT YOUR FINANCIAL OR OTHER PROFESSIONAL ADVISER IMMEDIATELY

                     OFFER BY ECOLAB AUSTRALIA PTY LTD,
                   TO ACQUIRE ALL YOUR ORDINARY SHARES IN
               GIBSON CHEMICAL INDUSTRIES LIMITED, ("GIBSON")

                      FORM OF ACCEPTANCE AND TRANSFER
       DETAILED INSTRUCTIONS FOR ACCEPTING THE OFFER ARE SET OUT BELOW
   PLEASE ENSURE YOU READ THE ENCLOSED KEY INFORMATION ON THE OFFER BEFORE
                         COMPLETING THIS FORM.

                             -----------------------------------------------
                             Holder Number                   
                             -----------------------------------------------
                             Subregister                     
                             -----------------------------------------------
                             Your holding of Gibson Shares   
                             -----------------------------------------------
                             If not fully paid, paid to:     
                             -----------------------------------------------
                             Consideration                   
                             -----------------------------------------------

(If your name, address or shareholding is incorrect please amend and initial).

THIS ACCEPTANCE FORM IS DIVIDED INTO 3 PARTS:

PART A  If at the time of acceptance your Gibson Shares are held on 
        the issuer sponsored subregister, you must complete Part A below in 
        respect of those shares.

PART B  If at the time of acceptance your Gibson Shares are held on 
        the CHESS subregister, you must complete Part B overleaf in respect 
        of the shares.

PART C  If at the time of acceptance you are entitled to be 
        registered as the Holder of Gibson Shares, the subject of 
        acceptance, but you are not registered as the holder of those 
        shares you must complete Part C, overleaf in respect of those 
        shares.

PART A  - ISSUER SPONSORED HOLDERS

I/We, the person(s) named above being the holder(s) of the Gibson Shares 
shown above accept the Offer in respect of the Gibson Shares referred to 
above, and agree to be bound by the terms of the Offer.

If this form is signed under Power of Attorney, the donee of the Power of 
Attorney declares that he has no notice of the revocation thereof.

- --------------------------------------   Date: --------------------------------

- --------------------------------------   Date: --------------------------------
Signature of Transferor(s)

(In the case of joint holders, all must sign, a corporation must affix its
common seal.)

If you tick this box, Ecolab will be taken to have received your acceptance on
the later of receipt by Ecolab of this
acceptance or 8 November 1997, and you will be entitled to receive the       D
Dividends referred to in clause 7.6 of the Offer.                           / /

Telephone number where we may contact you during business hours: (   )
                                                                 --------------

TO ACCEPT THIS OFFER, SEND IN THE REPLY PAID ENVELOPE PROVIDED OR DELIVER THIS
FORM TO:
              COOPERS & LYBRAND                         POSTAL ADDRESS:
              LEVEL 8, COOPERS & LYBRAND TOWER          COOPERS & LYBRAND
              580 GEORGE STREET,                        LOCKED BAG A14,
              SYDNEY NSW 1171                           SYDNEY SOUTH NSW 1232

TO BE RECEIVED NO LATER THAN THE END OF THE OFFER PERIOD SET OUT IN THE OFFER.

IF YOU HAVE ANY ENQUIRIES CONCERNING THE COMPLETION OF THIS FORM OF ACCEPTANCE
                               AND TRANSFER,
                         PLEASE TELEPHONE THE GIBSON
                   SHAREHOLDER ENQUIRY LINE AT COOPERS &
                          LYBRAND (02) 9285 7111

<PAGE>

PART B - INSTRUCTIONS FOR CHESS HOLDINGS

1.  If you are in doubt as to how to deal with your CHESS Holding, 
    please contact your Controlling Participant unless you are a Broker 
    or Non Broker Participant.

    To accept this Offer, instruct your Controlling Participant to 
    initiate the acceptance on CHESS.  This acceptance must be 
    initiated no later than the end of the Offer Period set out in the 
    Offer.

    To the controlling participant.
    Please initiate the acceptance of this offer on CHESS for my total holding.

    Signed: 
            -------------------------------------------------------------------
    (In the case of joint holders all must sign.  A corporation must affix its
    common seal).

DO NOT RETURN THIS FORM TO THE SHARE REGISTRY

PART C - INSTRUCTIONS FOR PERSONS ENTITLED TO BE REGISTERED BUT NOT REGISTERED
AS HOLDER OF GIBSON SHARES AT THE TIME OF ACCEPTANCE

If you are entitled to be registered in respect of Gibson Shares but, at the 
time you accept the Offer you are not registered as the holder of such 
shares, you must accept the Offer in respect of any such Gibson Shares by 
completing this form and returning it together with evidence which 
establishes your entitlement to be registered in respect of such Gibson 
Shares (eg a copy of  a contract note in respect of your purchase of those 
shares) to the address set out below so that it is received no later than the 
end of the Offer Period.

I/We, the person(s) named below, being at the time of this acceptance entitled
to be registered as the holder(s) of the number of Gibson Shares shown below:

1.  accept the Offer in relation to the number of Gibson Shares in respect of
    which I/we are entitled to be registered.

2.  agree to be bound by the terms and conditions of the Offer;

3.  attach evidence which establishes my/our entitlement to be registered in
    respect of the number of Gibson Shares shown below.

If this form is signed under Power of Attorney, the donee of the Power declares
that he has no notice of the revocation thereof.

                     Name and address in which your shares have been registered

                        Date:          /  /97 Name: 
- -----------------------                             -----------------------

                        Date:          /  /97 Address: 
- -----------------------                                --------------------
Signature of Transferor(s)

(in the case of joint holders, all must sign, a corporation must affix its
common seal.)

Telephone number where we may contact you during business hours: (  )
                                                                     ----------
TO ACCEPT THIS OFFER, SEND IN THE REPLY PAID ENVELOPE PROVIDED OR DELIVER THIS
FORM TOGETHER WITH YOUR SHARE CERTIFICATES TO:

              COOPERS & LYBRAND                         POSTAL ADDRESS:
              LEVEL 8, COOPERS & LYBRAND TOWER          COOPERS & LYBRAND
              580 GEORGE STREET,                        LOCKED BAG A14,
              SYDNEY NSW 1171                           SYDNEY SOUTH NSW 1232

  TO BE RECEIVED NO LATER THAN THE END OF THE OFFER PERIOD SET OUT IN THE OFFER.

IF YOU HAVE ANY ENQUIRIES CONCERNING THE COMPLETION OF THIS FORM OF ACCEPTANCE
                 AND TRANSFER, PLEASE TELEPHONE THE GIBSON
       SHAREHOLDER ENQUIRY LINE AT COOPERS & LYBRAND (02) 9285 7111


<PAGE>
A copy of this Notice has been registered by the Australian Securities 
Commission on 13 November 1997.  Neither the Australian Securities Commission
nor any of its officers takes any responsibility as to the contents of this
Notice.

NOTICE OF VARIATION PURSUANT TO SECTION 657 OF THE CORPORATIONS LAW

To:  GIBSON CHEMICAL INDUSTRIES LIMITED ACN 004 492 802 ("Gibson")

1.   Ecolab Australia Pty Ltd ACN 079 704 939 ("Ecolab") gives notice 
     that each of its offers dated 15 October 1997 ("the Offers") to acquire 
     all of the ordinary shares of 50 cents par value ("Gibson Shares") in 
     the capital of Gibson are varied by extending the period during which 
     the Offers remain open for acceptance for a period of one week until 
     5:00 pm on 24 November 1997, subject to Ecolab's right to further 
     extend such period in accordance with the Corporations Law.

2.   The Offers are accordingly varied in clause 3 by replacing "17 
     November 1997" with "24 November 1997".

3.   The Part A Statement dated 28 August 1997 which accompanied each 
     of the Offers is accordingly varied in clause 3 by inserting "a week 
     and" after "on the date which is".

Dated:  13 November 1997

Signed by David Brett and Graham Young, Directors of Ecolab authorised to sign 
this Notice pursuant to resolution passed at a meeting of the directors of 
Ecolab held on 13 November 1997.

/s/Graham Young                           /s/David Brett
- -------------------------------           ------------------------------------
Director                                  Director

<PAGE>

A copy of this Notice has been registered by the Australian Securities 
Commission on 21 November 1997.  Neither the Australian Securities Commission 
nor any of its officers takes any responsibility as to the contents of this 
Notice.

NOTICE OF VARIATION PURSUANT TO SECTION 657 OF THE CORPORATIONS LAW

To:  GIBSON CHEMICAL INDUSTRIES LIMITED ACN 004 492 802 ("Gibson")

1.   Ecolab Australia Pty Ltd ACN 079 704 939 ("Ecolab") gives notice 
     that each of its offers dated 15 October 1997, as amended by a Notice 
     of Variation dated 13 November 1997, (as amended "the Offers") to 
     acquire all of the ordinary shares of 50 cents par value ("Gibson 
     Shares") in the capital of Gibson are further varied by extending the 
     period during which the Offers remain open for acceptance for a period 
     of two weeks until 5:00 pm on 8 December 1997, subject to Ecolab's 
     right to further extend such period in accordance with the Corporations 
     Law.

2.   The Offers are accordingly varied in clause 3 by replacing "24 
     November 1997" with "8 December 1997".

3.   The Part A Statement dated 28 August 1997 which accompanied each 
     of the Offers is accordingly varied in clause 3 by replacing "a week 
     and a month" with "three weeks and a month".

Dated:    21 November 1997

Signed by David Brett and Graham Young, Directors of Ecolab authorised to sign
this Notice pursuant to resolution passed at a meeting of the directors of 
Ecolab held on 21 November 1997.

/s/Graham Young                            /s/David Brett
- ------------------------------             -----------------------------------
Director                                   Director

<PAGE>



                                 FOR IMMEDIATE RELEASE

                                 Michael J. Monahan       (612) 293-2809 (Tel)
                                                          (612) 225-3123 (Fax)


                        ECOLAB OFFER FOR GIBSON REACHES 98%;
                            OFFER BECOMES COMPULSORY

     ST PAUL, Minn., December 16, 1997: Ecolab Inc. announced that on 
December 8 its offer for the outstanding shares of Gibson Chemical Industries 
Limited of Melbourne, Australia closed with Ecolab having acquired over 98% 
of the outstanding shares.
     Ecolab will now proceed to acquire the remaining shares under an 
Australian law which allows for a complusory acquisition of these shares by 
Ecolab. Ecolab expects to complete this compulsory acquisition in about 30 
days.
     Ecolab is the leading global developer and marketer of premium cleaning, 
sanitizing, maintenance and pest elimination products and services for the 
hospitality, institutional and industrial markets. For the year ended 
December 31, 1996, Ecolab reported sales of US$1.5 billion; including 
European joint venture sales of US$0.9 billion, Ecolab's global sales coverage 
was US$2.4 billion. Ecolab shares are traded on the New York Stock Exchange 
and the Pacific Exchange under the symbol ECL.
     Ecolab news releases and other investor information are available on the 
Internet at http://www.ecolab.com; and by telephone at 1-800-322-8335.


                                       ###




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