The concept of liquid waterproofing has existed since the early 1800s, when natural bitumen was combined with jute, straw, rag felt and other man made materials to provide a waterproofing solution. Apart from liquid waterproofing membranes there are other different kinds of waterproofing system they can be preformed membranes like APP membrane (SuperThermolay), PVC membrane, and integral waterproofing compounds
Waterproofing with liquid membranes has gained popularity due to:• Ease of application/user friendly nature• Fully bonded system, thus ensures greater security against infiltration or damages to liquid  membrane• System is seamless, i.e. without joints• Can be installed easily on any contour surface.
The liquid membranes (bitumen, resin, acrylic, polyurethane, water or solvent based, in one/two-components) can be used in civil, industrial projects.
Their main application is waterproofing of roofs, balconies, terraces, roof-gardens and planters tubs, walls, parking lots and concrete structures, but also they can be used to waterproof surfaces and concrete walls, against-ground water. Apart from other brands, STP Ltd. is one of the pioneer companies for waterproofing which was established well back in 1935 trusted for generations, STP has the largest range of new generation and traditional waterproofing products in India.
• Two-components cementitious elastomeric liquid applied waterproofing membrane: ShaliCem EWP of STP can be reinforced with glass fibres and is used for waterproofing roof, sunken, watertank, swimming pools, foundations, retaining walls etc.• Liquid polyurethane materials: ShaliUrethane LHM used for all types of waterproofing, applied by roller or airless spray to waterproof balconies, roof deck, mechanical equipment rooms, wet rooms, terraces garden system.• Liquid applied TarFelt LM material: This category of product are also very versatile because they allow you to repair old Tarfelt waterproofing solutions without dismantling the existing system, can be used on asbestos roofing, metal sheets, concrete  and wood. This can be further coated with liquid applied waterproof paint ShaliCryl215 single component UV resistant Elastomeric coating.n
 
Authored by –Hasan Rizvi, Vice President,STP Limited