Exhibit 4.b

                            SUPPLEMENTAL INDENTURE


      THIS SUPPLEMENTAL INDENTURE, dated as of July 26, 1994, between Masco
Corporation, a Delaware corporation (the "Company"), and The First National
Bank of Chicago, as trustee (the "Trustee").

      WHEREAS, the Company entered into an Indenture dated as of December 1,
1982 with Morgan Guaranty Trust Company (the "Indenture");

      WHEREAS,  the Trustee is the successor trustee under the Indenture; and

      WHEREAS,  Section 9.01(e) the Indenture provides for supplemental
indentures to make changes, provided such action does not adversely affect the
interests of the holders of the Securities.

      NOW, THEREFORE, the parties agree as follows:

      1.    Section 6.10 of the Indenture shall be amended by inserting the
following as a new subparagraph (e):

            "(e)  Notwithstanding the provisions of Section 6.12, in
      connection with any sale or proposed sale of all or any portion of
      the corporate trust business of any Trustee hereunder or any other
      transaction that would result in a change of control of such
      corporate trust business, and provided that no Event of Default
      exists, the Company may remove the Trustee and appoint a successor
      trustee by written instrument, in duplicate, executed by order of
      the Board of Directors, one copy of which instrument shall be
      delivered to the Trustee so removed and one copy to the successor
      trustee.  Any removal of the Trustee and appointment of a
      successor trustee pursuant to the foregoing shall become effective
      upon acceptance of appointment by the successor trustee as
      provided in Section 6.11."

      2.    Except as hereinabove expressly set forth, all other terms and
provisions set forth in the Indenture shall remain in full force and effect
and without any change whatsoever being made hereby. 
PAGE

      IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture
to be executed and acknowledged as of the date first written above.

                                          MASCO CORPORATION


                                          By:/s/ Gerald Bright      
                                          Name:  Gerald Bright
                                          Title: Vice President

[Seal]
Attest:


/s/ Eugene A. Gargaro, Jr.
Secretary
                                          THE FIRST NATIONAL BANK
                                            OF CHICAGO


                                          By:/s/ R. D. Manella      
                                          Name:  R. D. Manella
                                          Title: Vice President

[Seal]
Attest:


/s/ Jamie Arlow           
Trust Officer

State of Michigan)
                 ) ss
County  of  Wayne)

      On the 22nd day of July, 1994, before me personally came Gerald Bright,
to me known, who, being by me duly sworn, did depose and say that he is a Vice
President of Masco Corporation, the corporation described in and which
executed the above instrument; that he knows the corporate seal of said
corporation; that the seal affixed to the said instrument is such corporate
seal; that it was so affixed by authority of the Board of Directors of said
corporation; and that he signed his name thereto by like authority.


                                          /s/ Nancy S. Steinrock    
                                          Nancy S. Steinrock
                                          Notary Public
                                          Wayne County, Michigan
                                          My Comm. Exp.: Nov. 9, 1994
[NOTARIAL SEAL]
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PAGE

State of Illinois)
                 ) ss
County  of  Cook )

      On the 22nd day of July, 1994, before me personally came R. D. Manella,
to me known, who, being by me duly sworn, did depose and say that he is a Vice
President of The First National Bank of Chicago, the corporation described in
and which executed the above instrument; that he knows the corporate seal of
said corporation; that the seal affixed to the said instrument is such
corporate seal; that it was so affixed by authority of the Board of Directors
of said corporation; and that he signed his name thereto by like authority.


                                          /s/ C. J. Bertelson          
                                          C. J. Bertelson
                                          Notary Public
                                          State of Illinois
                                          My Comm. Exp.:  Sept. 1, 1997
[NOTARIAL SEAL]


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