Viton is the most chemical resistant foam and can withstand extreme temperatures. It is the go to choice for the most extreme of applications. This Product is Manufactured in China. Grade: Strip; Firmness: Closed Cell; Backing Type: Viton. Thickness: 1/4"; Width: 1/2"; Length: 56". Color: Black; Texture: Smooth; Compression Deflection at 25%: 7 psi; Density: 15 lbs / cu. ft.; Tensile Strength: 100 psi. Temperature Range: -15° to 400° F; Specifications Met: ASTM D1056 2B2.