EZ~Spray® Silicone 20 and 22 are sprayable silicones which cure quickly to soft rubbers with high elongation and tear strength. Liquid silicone is sprayed through the EZ~Spray® Junior Cartridge System which is an economical alternative to expensive spray equipment. After a suitable thickness is attained, EZ~Spray® Silicone 20 cures in about 10 minutes while EZ~Spray® Silicone 22 cures in about 45 minutes. EZ~Spray® Silicone cures with negligible shrinkage to strong, durable silicone rubbers good for production casting of polyester, epoxy or urethane resins, gypsum, concrete and other materials.EZ~Spray® Silicone 20 and 22 silicones are effective at making fast, cost effective vacuum bags for producing composite parts. Newly sprayed or injected bags can be removed from the mold in a matter of minutes and used immediately in production with polyester or epoxy resin systems. The advantage that EZ~Spray® Silicone offers vs. conventional vacuum bagging systems is the speed at which a production-ready silicone bags can be made resulting in significant time and labor savings. Read the EZ~Spray® Junior manual prior to spraying.Yield - Each cartridge contains 3.75 lbs. (1.7 kgs) of material. Assuming a thickness of 3/8 inches (0.95 cm), one cartridge of EZ~Spray® Silicone 20 will cover approximately 1.66 sq. ft. (0.15 square meters).