RAVAPROOF LIQUID – BITUMEN PRODUCTS Home / Products / AVIP TWIN AVIP TWIN Sprayed, two-component bituminous product which instantly creates highly elastic waterproofing membrane in constructions such as foundations, basement walls of high depth with a high water table, bridges, tunnels, reservoirs etc. Application fields WaterproofingBasement Waterproofing Downloads DoP | AVIP TWIN TDS | AVIP TWIN