POWER OF ATTORNEY


       I appoint each of Kenneth G. Cole, John G. Sznewajs, and
Yvette M. VanRiper, signing singly, my attorney-in-fact to:

    (1)   prepare, execute in my name and on my behalf, and submit to the
U.S. Securities and Exchange Commission (the "SEC") a Form ID, including
amendments thereto, and any other documents necessary or appropriate to
obtain codes and passwords enabling me to make electronic filings with the
SEC of reports required by Section 16(a) of the Securities Exchange Act of
1934 or any rule or regulation of the SEC;

    (2)   execute for and on my behalf in my capacity as an officer and/or
director of Masco Corporation, Forms 3, 4, and 5 as required by Section 16(a)
of the Securities Exchange Act of 1934 and the rules thereunder, and any other
forms that I may be required to file in connection with my ownership,
acquisition, or disposition of securities of Masco Corporation;

    (3)  do and perform any and all acts for and on my behalf which may be
necessary or desirable to complete and execute any such Form 3, 4, or 5, or
other form or report, and timely file such form or report with the SEC and
any stock exchange or similar authority;

    (4)  execute and file for and on my behalf in my capacity as an officer
and/or director of Masco Corporation, Form 144 with the SEC and any stock
exchange, relating to my proposed sale of securities of Masco Corporation
as required pursuant to Rule 144 of the Securities Act of 1933; and

    (5)  do anything in connection with the foregoing which such
attorney-in-fact may deem legally required by me or in my best interest.

    I grant to each such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary or proper
to be done in the exercise of any of the rights and powers herein granted, as
fully to all intents and purposes as I could do if personally present, with
full power of substitution, hereby ratifying and confirming all that such
attorney-in-fact shall lawfully do or cause to be done by virtue of this Power
of Attorney and the rights and powers herein granted.

    I acknowledge that the foregoing attorneys-in-fact, in serving in such
capacity at my request, are not assuming, nor is Masco Corporation assuming,
any of my responsibilities to comply with Section 16 of the Securities Exchange
Act of 1934 and with Rule 144 of the Securities Act of 1933.

       This Power of Attorney supersedes any Power of Attorney executed by me,
which is hereby revoked.  This Power of Attorney shall remain in effect until
I am no longer required to file Forms 3, 4, 5, and 144 with respect to my
holdings of and transactions in securities issued by Masco Corporation, unless
earlier revoked in writing by me.

       This Power of Attorney is executed on May 18, 2021.


                                       /s/ Richard A. Marshall