DERMAPUTTY is Bitumen based joint sealing compound which, when heated, is a suitable molding putty for hand application. DERMAPUTTY is formulated with ductile bitumen compounded with gelling agents, antioxidants, antizonants, stabilizers and special additives. DERMAPUTTY is capable of withstanding expansion, contraction and structural movement. DERMAPUTTY is resistant to bacteriogical attack and is therefore recommended for use in water retaining structures where biological activity occurs. DERMAPUTTY is tough, resistant to weather, slum and is unaffected by permanent immersion in water and therefore impart no taint to it.