POWER OF ATTORNEY

 FOR EXECUTING FORMS 3, 4 AND 5





Know all by these presents that the undersigned hereby constitutes and appoints each of

Steven L. Watson, A. Andrew R. Louis and Andrew B. Nace signing singly, his/her true and lawful

attorney-in-fact to:



execute for and on behalf of the undersigned Forms 3, 4 and 5 in accordance with Section 16(a) of

the Securities Exchange Act of 1934, as amended (the "Act"), and the rules thereunder;



do and perform any and all acts for an on behalf of the undersigned that may be necessary or

desirable to complete the execution of any such Forms 3, 4 or 5 and the timely filing of such form

with the United States Securities and Exchange Commission and any other authority; and



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 such

attorney-in-fact 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 lawful 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 any of the undersigned's

responsibilities to comply with Section 16 of the Act.





 EXECUTED as of this 8th day of May, 2013.







       /c/ Gen. Thomas P. Stafford

       Signature















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