Cometic Hi-Performance Non-Asbestos Gasket Kits are made from the highest quality, non-asbestos gasket material available.. Cometic Manifold and Base Gaskets are made from non-asbestos nitride rubber bound fiber material for a high resistance to both chemicals and heat. Copper Gaskets are made from high grade annealed copper and are available in a variety of thicknesses. Cometic Graphite Head Gaskets are made from non-asbestos flexible graphite laminated to a stainless steel core.. Impervious to fuels, coolants and oils. Does not require additional sealers
