Shiv Sons Bitumen Membrane Roll Supplier also known as asphalt, is a sticky, black, and highly viscous liquid or semi-solid form of petroleum. Thanks to its waterproofing qualities, it is widely used in construction. Bituminous membranes are perfect for waterproofing roofs, basements, below-ground structures, bridges, and other structures. General Bituminous Membrane Build-Up. The combination of raw materials can be built up in thousands of possibilities, but this is a typical composition example. Torch-applied Bituminous Membranes Once applied, Shiv Sons Bitumen Membrane Roll Manufacturer is a thin layer of watertight material fully bonded to the surface. It is a flexible system, able to maintain its waterproof capacity without causing cracks.