##### 



Exhibit 12.1



KRATON Polymers LLC

Ratio of Earnings to Fixed Charges

000's



|                                                 |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                 |   |  | 
|------------------------------------------------ |  | ------------------------- | - |  | ------------------------- | - |  | --------------------------------------------- | - |  | -------------------------------------------------- | - |  | -------------------------- | - |  | ------------------------------- | - |  | ------------------------------- | - |  | 
|                                                 |  |                           |   |  |                           |   |  |                                               |   |  | Predecessor                                        |   |  | Elastomers Business       
|                                                 |  | YearEndedDecember 31,2005 |   |  | YearEndedDecember 31,2004 |   |  | Period fromDecember 23throughDecember 31,2003 |   |  | Period fromJanuary
      1,throughDecember 23,2003 |   |  | Year EndedDecember 31,2002 |   |  | Ten MonthsEndedDecember 31,2001 |   |  | Two MonthsEndedFebruary 28,2001 |   | 
|                                                 |  |                           |   |  |                           |  
|Earnings:                                        |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                 |  
|Pre-tax income (loss)                            |  | 34,179                    |   |  | (54,794                   | ) |  | (3,406                                        | ) |  | 12,870                                             |   |  | 52,332                     |   |  | (18,992                         | ) |  | (1,000                          | ) | 
|Income from equity investees                     |  | (1,516                    | ) |  | (462                      | ) |  | (28                                           | ) |  | (621                                               | ) |  | (1,171                     | ) |  | (1,045                          | ) |  |                                |  
|Fixed charges                                    |  | 36,832                    |   |  | 41,943                    |   |  | 589                                           |   |  | 60,683                                             |   |  | 39,656                     |   |  | 41,863                          |   |  | 1,333                           |   | 
|Distributed income of equity
      investees     |  | 461                       |   |  | 561                       |   |  |                                              |   |  | 1,064                                              |   |  | 710                        |   |  | 810                             |   |  |                                |  
|                                                 |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                 |   | 
|Total Earnings                                   |  | 69,956                    |   |  | (12,752                   | ) |  | (2,845                                        | ) |  | 73,996                                             |   |  | 91,527                     |   |  | 22,636                          |   |  | 333                             |  
|                                                 |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                
|Fixed Charges:                                   |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                 |   |  | 
|Interest expensed                                |  | 32,303                    |   |  | 34,247                    |   |  | 518                                           |   |  | 36,775                                             |   |  | 32,982                     |   |  | 36,759                          |   |  | 1,000                           |  
|Amortization of deferred financing
      costs   |  | 2,262                     |   |  | 5,563                     |   |  | 38                                            |   |  | 13,370                                             |   |  | 3,763                      |   |  | 2,867                           |   |  |                                |   |  | 
|Accretion of debt discount                       |  |                          |   |  |                          |   |  |                                              |   |  | 8,505                                              |   |  | 1,044                      |   |  | 870                             |   |  |                                |  
|Estimate of interest within rental
      expense |  | 2,267                     |   |  | 2,133                     |   |  | 33                                            |   |  | 2,033                                              |   |  | 1,867                      |   |  | 1,367                           |   |  | 333                             |   | 
|                                                 |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                 |   | 
|Total fixed charges                              |  | 36,832                    |   |  | 41,943                    |   |  | 589                                           |   |  | 60,683                                             |   |  | 39,656                     |   |  | 41,863                          |   |  | 1,333                           |  
|                                                 |  |                           |   |  |                           |  
|Deficiency of Earnings to Fixed
      Charges    |  |                          |   |  | (54,695                   | ) |  | (3,434                                        | ) |  |                                                   |   |  |                           |   |  | (19,227                         | ) |  | (1,000                          | ) |  | 
|                                                 |  |                           |   |  |                           |   |  |                                               |   |  |                                                    |   |  |                            |   |  |                                 |   |  |                                 |   | 
|Ratio of Earnings to Fixed
    Charges           |  | 1.9                       |   |  |                          |   |  |                                              |   |  | 1.2                                                |   |  | 2.3                        |   |  |                                |   |  |                                |