Also Known as Polysiloxane, This Silicone Rubber Offers Good Resistance to a Wide Variety of Chemicals. Softer Durometer Rubber Has Better Conformability; at 60A Durometer This Silicone Rubber is Medium and Conformable. Smooth Finish, No Adhesive Backing. Includes 1 Sheet of White Silicone Rubber .062 Inch Thick, 9" x 12" (1.6mm x 230mm x 305mm). Made of FDA-Listed Materials for Use with Food and Beverage, 21 CFR 177.2600 / FDA Compliant, 3A 18-03 Class 1 (Sanitary Standard). Advantages of Silicone Rubber: 450F Use Temperature, Makes a Great Non-Stick Surface, Resists Oil, Acids, Animal Fats, Vinegar, Acetone, Amonium Hydroxide, and Natural Gas. Not Recommended for Gasoline, Fuel Oil, Kerosene, or Toluene.