POWER OF ATTORNEY FOR EXECUTING FORMS 3, 4 AND 5

	Know all by these present, that the undersigned hereby constitutes
and appoints each of Andrew B. Nace, Jane R. Grimm, and M. Paige Savage
signing singly, his/her true and lawful attorney-in-fact to:

1. execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of Kronos Worldwide, Inc.
(the "Company"), Forms 3, 4 and 5 in accordance with Section 16(a)
of the Securities Exchange Act of 1934 (the "Act") and the rules
thereunder, and any other forms or reports the undersigned may be
required to file in connection with the undersigned's ownership,
acquisition, or disposition of securities of the Company;

2. do and perform any and all acts for and on behalf of the undersigned
that may be necessary or desirable to complete the execution of any
such Forms 3, 4 or 5 or other form or report, and the timely filing
of such form or report with the United States Securities and Exchange
Commission and any other authority; and

3. take any other action of any type whatsoever in connection with the
foregoing that in the opinion of such attorney-in-fact, may be of benefit
to, in the best interest of, or legally required by, the undersigned, it
being understood that the documents executed by such attorney-in-fact
on behalf of the undersigned pursuant to this Power of Attorney shall
be in such form and shall contain such terms and conditions as such
attorney-in-fact may approve in his/her discretion.

	The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform all and every act and thing whatsoever
requisite, necessary and proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes
as the undersigned might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that
such attorney-in-fact, or his/her substitute or substitutes, shall lawfully
do or cause to be done by virtue of this Power of Attorney and the rights
and powers herein granted.  The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Act.

EXECUTED as of this 18th day of May, 2022.

/s/ Randall Colin Gouveia Signature

Randall Colin Gouveia Printed Name