Joint and crack grouts are Polyurethane or PMMA resins for filling and sealing. The elastic resins seal working joints, wide cracks and dilatation joints. They are self-levelling or thixotropic for slopes. With excellent chemical resistance for indoor and outdoor use. The advantage of the Rokryl PMMA resins is the application at low temperatures. Contact grouts bond cracks in concrete or screed with the doweling method.