AltroMastic 100 is a color-matching product for Altro Safety Flooring and Altro Transflor. The use of a standard sealant gun is required. AltroMastic 100 is a specially formulated sealing compound for use where Altro floorings are cut around pipes, upstands, door frames, and other hard surfaces, as well as where the flooring touches corners, skirtings, walls, and other hard surfaces. A clamping or welding device should be used where flooring meets drainage channels, access covers, quarry tiles, and other surfaces. AltroMastic 100 can only be used to seal joints in Altro floorings where a hot air welding gun cannot be used due to obstructions.