Spartech (SEH) 10-Q 2011 Q3 Quarterly report

Exhibit 32.1

Certification Pursuant to Exchange Act Rule 13a-14(b) and

18 U.S.C. Section 1350

In connection with the Quarterly Report of Spartech Corporation (the “Company”) on Form 10-Q for the period ended July 30, 2011, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Victoria M. Holt, President and Chief Executive Officer, certify, to the best of my knowledge, pursuant to Exchange Act Rule 13a-14(b) and 18 U.S.C. Section 1350, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	September 7, 2011	By:	/s/ Victoria M. Holt
			Victoria M. Holt
			President and Chief Executive Officer (Principal Executive Officer)