Exhibit 12.1

KRATON PERFORMANCE POLYMERS, INC.

Ratio of Earnings
to Fixed Charges

(In thousands)



|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|------------------------------------------------------------------------------------------------------------ |  | ---------------- | - |  | ---------------- | - |  | ---------------- | - |  | ---------------- | - |  | ---------------- | -
|                                                                                                             |  | December 31,2009 |   |  | December 31,2008 |   |  | December 31,2007 |   |  | December 31,2006 |   |  | December 31,2005 |  
|Fixed Charges:                                                                                               |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|+ Interest expensed                                                                                          |  | 29,866           |   |  | 35,212           |   |  | 42,632           |   |  | 40,064           |   |  | 33,119           |  
|+ Interest capitalized                                                                                       |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|+ Amortization of deferred financing costs                                                                   |  | 4,090            |   |  | 2,139            |   |  | 2,715            |   |  | 2,351            |   |  | 2,400            |  
|+ Accretion of debt discount                                                                                 |  |                 |   |  |                 |   |  |                 |   |  | 25,942           |   |  | 11,653           |  
|+ Estimate of interest within rental expense                                                                 |  | 1,734            |   |  | 2,800            |   |  | 2,449            |   |  | 2,449            |   |  | 2,267            |  
|+ Preference security dividend requirements                                                                  |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|Total fixed charges                                                                                          |  | 35,690           |   |  | 40,151           |   |  | 47,796           |   |  | 70,806           |   |  | 49,439           |  
|Earnings:                                                                                                    |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|+ Pre-tax income (loss)                                                                                      |  | (1,657           | ) |  | 36,850           |   |  | (37,629          | ) |  | (4,022           | ) |  | 22,389           |  
|- Income from equity investees                                                                               |  | (403             | ) |  | (437             | ) |  | (626             | ) |  | (168             | ) |  | (1,516           | )
|+ fixed charges                                                                                              |  | 35,690           |   |  | 40,151           |   |  | 47,796           |   |  | 70,806           |   |  | 49,439           |  
|+ Amortization of capitalized interest                                                                       |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|+ Distributed income of equity investees                                                                     |  | 433              |   |  | 1,041            |   |  | 106              |   |  | 1,265            |   |  | 461              |  
|+ Pre-tax losses of equity investees for which charges arising from guarantees are included in fixed charges |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|- Interest capitalized                                                                                       |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|- Preference security dividend requirements                                                                  |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|- The minority interest in pre-tax income of subsidiaries that have not incurred fixed charges               |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|Total Earnings                                                                                               |  | 34,063           |   |  | 77,605           |   |  | 9,647            |   |  | 67,881           |   |  | 70,773           |  
|Deficiency (Surplus)                                                                                         |  | 1,627            |   |  | (37,454          | ) |  | 38,149           |   |  | 2,925            |   |  | (21,334          | )
|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|Ratio                                                                                                        |  | 0.95             |   |  | 1.93             |   |  | 0.20             |   |  | 0.96             |   |  | 1.43             |  
|Ratio of Earnings to Fixed Charges                                                                           |  | 1.0:1.0          |   |  | 1.9:1.0          |   |  | 0.2:1.0          |   |  | 1.0:1.0          |   |  | 1.4:1.0          |  

Our
earnings were insufficient to cover our fixed charges for the year ended December 31, 2009 by approximately $1.6 million, for the year ended December 31, 2007 by approximately $38.1 million and for the year ended December 31, 2006 by
approximately $2.9 million.



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Exhibit 12.1

KRATON POLYMERS LLC

Ratio of Earnings to Fixed
Charges

(In thousands)



|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|------------------------------------------------------------------------------------------------------------ |  | ---------------- | - |  | ---------------- | - |  | ---------------- | - |  | ---------------- | - |  | ---------------- | -
|                                                                                                             |  | December 31,2009 |   |  | December 31,2008 |   |  | December 31,2007 |   |  | December 31,2006 |   |  | December 31,2005 |  
|Fixed Charges:                                                                                               |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|+ Interest expensed                                                                                          |  | 29,861           |   |  | 35,188           |   |  | 42,608           |   |  | 39,916           |   |  | 32,303           |  
|+ Interest capitalized                                                                                       |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|+ Amortization of deferred financing costs                                                                   |  | 4,090            |   |  | 2,139            |   |  | 2,715            |   |  | 2,351            |   |  | 2,262            |  
|+ Accretion of debt discount                                                                                 |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|+ Estimate of interest within rental expense                                                                 |  | 1,734            |   |  | 2,800            |   |  | 2,449            |   |  | 2,449            |   |  | 2,267            |  
|+ Preference security dividend requirements                                                                  |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|Total fixed charges                                                                                          |  | 35,685           |   |  | 40,127           |   |  | 47,772           |   |  | 44,716           |   |  | 36,832           |  
|Earnings:                                                                                                    |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|+ Pre-tax income (loss)                                                                                      |  | (1,652           | ) |  | 36,874           |   |  | (37,605          | ) |  | 22,068           |   |  | 34,179           |  
|- Income from equity investees                                                                               |  | (403             | ) |  | (437             | ) |  | (626             | ) |  | (168             | ) |  | (1,516           | )
|+ fixed charges                                                                                              |  | 35,685           |   |  | 40,127           |   |  | 47,772           |   |  | 44,716           |   |  | 36,832           |  
|+ Amortization of capitalized interest                                                                       |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|+ Distributed income of equity investees                                                                     |  | 433              |   |  | 1,041            |   |  | 106              |   |  | 1,265            |   |  | 461              |  
|+ Pre-tax losses of equity investees for which charges arising from guarantees are included in fixed charges |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|- Interest capitalized                                                                                       |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|- Preference security dividend requirements                                                                  |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|- The minority interest in pre-tax income of subsidiaries that have not incurred fixed charges               |  |                 |   |  |                 |   |  |                 |   |  |                 |   |  |                 |  
|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|Total Earnings                                                                                               |  | 34,063           |   |  | 77,605           |   |  | 9,647            |   |  | 67,881           |   |  | 69,956           |  
|Deficiency (Surplus)                                                                                         |  | 1,622            |   |  | (37,478          | ) |  | 38,125           |   |  | (23,165          | ) |  | (33,124          | )
|                                                                                                             |  |                  |   |  |                  |   |  |                  |   |  |                  |   |  |                  |  
|Ratio                                                                                                        |  | 0.95             |   |  | 1.93             |   |  | 0.20             |   |  | 1.52             |   |  | 1.90             |  
|Ratio of Earnings to Fixed Charges                                                                           |  | 1.0:1.0          |   |  | 1.9:1.0          |   |  | 0.2:1.0          |   |  | 1.5:1.0          |   |  | 1.9:1.0          |  

Our
earnings were insufficient to cover our fixed charges for the year ended December 31, 2009 by approximately $1.6 million and for the year ended December 31, 2007 by approximately $38.1 million.