Obaproof AB Top Seal 119 is a cementitious, two-part, polymer-modified flexible waterproofing coating. It is applied to concrete and mortar to prevent water infiltration. Areas of application include water tanks, basements, car parks, terraces, balconies, bridges, retaining walls, swimming pools, RC guttrts, bathroom floors and wall, planter boxes, wet rooms for example kitchens,waste water treatment plants, shower rooms and laundries. colour after mix with part a & part b is green slurry. pm us more details.