The Black Soft Weatherproof EPDM Foam Sheets with Plain Back can withstand water, sunlight, and oxidation. The sheets are designed with closed-cell foam which limits water, air, and gases from being absorbed. Thickness: 3/8 Inch Thickness Tolerance: -0.035" to +0.035" Inch Hardness Rating: Soft Temperature Range: -90° to 275° F Cell Type: Closed For Use Outdoors: Yes Tensile Strength Rating: Good Oil-Resistance Rating: Not Rated Color: Black Sheet Size: 36" x 36"