SBS/APP Modified Bitumen Waterproof Membrane Good waterproofing dampproofing,ageing-resistance,leakproofing,no flowing at highest ... application,and long service,etc. Usage: It is widely used for the waterproofing and dampproofing of the roofs,basements,toilets etc ... areas,tunnels,reservoirs,cold area and of strong sun-shining. SBS/APP Modified Bitumen Waterproof Membrane