A soft and flexible silicone rubber sealant which fills and caulks gaps, joints and cracks around the boat. It will adhere to glassfibre, metal, sailcloth, glass, paint, and varnished wood as well as most plastics. Ideally suited to fill joints where pipes or trunking pass through decks or bulheads where flexibility is required to ensure a watertight joint. Can also be used to make gaskets for water pumps, exhaust systems etc. It is heat resistant and is unaffected by immersion in salt or fresh water. 78g.