HydroBloc Polygel 530 is a waterproofing resin for gel curtains. A gel curtain is a waterproofing between building and soil. The membrane protects the building from any water contact. Typically used for slab sealing, wall sealing and pipe repair. HydroBloc Polygel 530 is a hydrogel made of acrylic polymers. Contained water is stored in polymer structure but not chemically bonded. This special storage structure is advantageous; it enables the gel to keep the water inside, even under pressure and mechanical strain. Polygel is not sponge like!