Micro-cellular urethane foam

Available in rolls, strips and die-cut shapes (with or without adhesive).

Main characteristics:

excellent compression set resistance that will not break down with repeated use and parts keep their shape after assembly
uniform and consistent physical properties that ensure excellent dimensional stability, making it the product of choice when design requirements dictate very high dimensional precision
abrasion-resistant
resistant to a wide array of chemical products
withstands temperatures as high as 121°C (250°F)
very high energy–absorption level
aesthetically appealing