Waterproof acrylic mass assures flexible and plastic joints which can be easily painted. It demonstrates very good adhesion to raw wood, wood painted with primer and gloss paint or lacquers, to galvanized sheets and varnished sheets, stainless steel, as well as most foundations used in construction industry, such as concrete, brick, plaster, ceramics, glass, etc. It becomes fully plastic by way of the physical evaporation of water. Hardened mass is resistant to variable weather conditions.