Topstik Silicone Gasket Maker – 310ml RTV. Provides a fast way to make leakproof gaskets that will replace any size or shape of cork, felt, rubber, paper, asbestos or other factory specified gasket systems. Ideal for providing a waterproof seal for windscreens, lights and for insulating wiring connections. Silicone Seal Gasket Maker is a high performance silicone. One of the toughest, most versatile sealants you can buy. Topstik Silicone Gasket Maker – 310ml is a leak proof gasket in a tube. Specially formulated to replace cork, paper, felt and rubber gaskets. Use to bond and seal metal, glass, vinyl, rubber, plastic and concrete etc. Fill size 310ml. To view our full range of Topstik brand products, click here.