A type of bullnose trim with a convex radius on two adjacent edges. A plain square joint between two members Buttonback tile Tile that have projections on the bondable side. Many of these projections are round and therefore the term buttonback. It has the poorest resistance to petroleum oils and gasolines of any rubber. Heat resistance is above average.
Sunlight resistance is excellent.
It's abrasion resistance is not as good as natural rubber. Usually low permeability to gases. Catalyst Substance which markedly speeds up the cure of an adhesive when added in minor quantity as compared to the amounts of primary reactants. Caulking Compound A soft, plastic material consisting of pigment and vehicle, used for sealing joints in buildings and other structures where normal structural movement may occur. Caulking compound retains its plasticity for an extended period after application.