Exhibit 31.1

                                  CERTIFICATION

I,  Bradley  B.  Buechler, Chairman, President, and Chief Executive  Officer  of
Spartech Corporation, certify that:

1.   I have reviewed this annual report on Form 10-K of Spartech Corporation;

2.   Based on my knowledge, this report does not contain any untrue statement of
     a  material  fact or omit to state a material fact necessary  to  make  the
     statements  made, in light of the circumstances under which such  statement
     were  made,  not  misleading with respect to the  period  covered  by  this
     report;

3.   Based  on  my  knowledge,  the financial statements,  and  other  financial
     information  included  in  this  report, fairly  present  in  all  material
     respects  the financial condition, results of operations and cash flows  of
     the registrant as of, and for, the periods presented in this report;

4.   The  registrant's  other  certifying officer  and  I  are  responsible  for
     establishing and maintaining disclosure controls and procedures (as defined
     in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

     a)   Designed  such  disclosure  controls and procedures,  or  caused  such
          disclosure   controls  and  procedures  to  be  designed   under   our
          supervision,  to  ensure  that material information  relating  to  the
          registrant, including its consolidated subsidiaries, is made known  to
          us  by others within those entities, particularly during the period in
          which this annual report is being prepared;

     b)   Evaluated  the  effectiveness of the registrant's disclosure  controls
          and  procedures and presented in this report our conclusions about the
          effectiveness of the disclosure controls and procedures, as of the end
          of the period covered by this report based on such evaluation; and

     c)   Disclosed  in  this  report  any change in the  registrant's  internal
          control over financial reporting that occurred during the registrant's
          most recent fiscal quarter (the registrant's fourth fiscal quarter  in
          the  case  of  an annual report) that has materially affected,  or  is
          reasonably  likely  to  materially affect, the  registrant's  internal
          control over financial reporting; and

5.   The  registrant's other certifying officer and I have disclosed,  based  on
     our most recent evaluation of internal control over financial reporting, to
     the registrant's auditors and the audit committee of the registrant's board
     of directors (or persons performing the equivalent functions):

     a)   All significant deficiencies and material weaknesses in the design  or
          operation  of  internal  control over financial  reporting  which  are
          reasonably  likely  to  adversely affect the registrant's  ability  to
          record, process, summarize and report financial information; and

     b)   Any  fraud, whether or not material, that involves management or other
          employees  who  have  a significant role in the registrant's  internal
          control or financial reporting.



January 12,2005                         By: /s/ Bradley B. Buechler
   (Date)                                    Bradley B. Buechler
                                             Chairman, President and Chief
                                             Executive Officer
                                             Spartech Corporation


                                                                    Exhibit 31.2

                                  CERTIFICATION

I,  Randy  C.  Martin, Executive Vice President and Chief Financial  Officer  of
Spartech Corporation, certify that:


1.   I have reviewed this annual report on Form 10-K of Spartech Corporation;

2.   Based on my knowledge, this report does not contain any untrue statement of
     a  material  fact or omit to state a material fact necessary  to  make  the
     statements  made, in light of the circumstances under which such  statement
     were  made,  not  misleading with respect to the  period  covered  by  this
     report;

3.   Based  on  my  knowledge,  the financial statements,  and  other  financial
     information  included  in  this  report, fairly  present  in  all  material
     respects  the financial condition, results of operations and cash flows  of
     the registrant as of, and for, the periods presented in this report;

4.   The  registrant's  other  certifying officer  and  I  are  responsible  for
     establishing and maintaining disclosure controls and procedures (as defined
     in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

     a)   Designed  such  disclosure  controls and procedures,  or  caused  such
          disclosure   controls  and  procedures  to  be  designed   under   our
          supervision,  to  ensure  that material information  relating  to  the
          registrant, including its consolidated subsidiaries, is made known  to
          us  by others within those entities, particularly during the period in
          which this annual report is being prepared;

     b)   Evaluated  the  effectiveness of the registrant's disclosure  controls
          and  procedures and presented in this report our conclusions about the
          effectiveness of the disclosure controls and procedures, as of the end
          of the period covered by this report based on such evaluation; and

     c)   Disclosed  in  this  report  any change in the  registrant's  internal
          control over financial reporting that occurred during the registrant's
          most recent fiscal quarter (the registrant's fourth fiscal quarter  in
          the  case  of  an annual report) that has materially affected,  or  is
          reasonably  likely  to  materially affect, the  registrant's  internal
          control over financial reporting; and

5.   The  registrant's other certifying officer and I have disclosed,  based  on
     our most recent evaluation of internal control over financial reporting, to
     the registrant's auditors and the audit committee of the registrant's board
     of directors (or persons performing the equivalent functions):

     a)   All significant deficiencies and material weaknesses in the design  or
          operation  of  internal  control over financial  reporting  which  are
          reasonably  likely  to  adversely affect the registrant's  ability  to
          record, process, summarize and report financial information; and

     b)   Any  fraud, whether or not material, that involves management or other
          employees  who  have  a significant role in the registrant's  internal
          control or financial reporting.

January 12,2005                         By: /s/ Randy C. Martin
   (Date)                                 Randy C. Martin
                                          Executive Vice President and
                                          Chief Financial Officer
                                          Spartech Corporation