Rubber-Cal General-purpose Rubber 1/8-in T x 24-in W x 36-in L Black Commercial 60A Durometer Rubber Sheet in the Rubber Sheets & Rolls department at Lowes.com
Amazon.com: Adhesive Black Rubber Pad Sheet Thin Silicone Rubber Gasket Sheet 12X12 inch,1/25 Inch Thick Gaskets DIY Material, Supports, Leveling, Sealing, Bumpers, Protection (1/25, 1) : Industrial & Scientific
Silicone rubber sheet Thickness 0.1 0.2 0.3 0.5mm thin board High Temperature Chemical Resistance Black Square Rubber Mat Plate
Rubber-Cal Silicone 1/16 in. x 36 in. x 12 in. Translucent Commercial Grade 60A Rubber Sheet 20-119-0062-36-012 - The Home Depot