Commercial Grade Silicone sheeting is used in applications where physical properties of the silicone are not critical but extreme temperature resistance is necessary. Silicone CG has a working temperature of up to 450 Fahrenheit (500 F Intermittent). Commercial Grade Silicone has excellent resistance to fungus, acetic acid, ammonia gas (hot and cold), corn oil, fish oil. Silicone CG is red oxide in color.