For many years Gremolith has been a specialized supplier of polyester resin systems for the trenchless restoration of sewer pipes. In order to optimally adjust to the processing and curing requirements of the customer, formulated and filled UP resins with respective curing agent combinations are mixed. Depending on the application flexible hoses are impregnated with special resin/curing agent systems by the customers’ or on the construction site. Subsequently, they are installed in the sewer tunnel where they are cured with hot water, steam or ultraviolet light. For small sewer tunnels or house connected sewers, Gremolith supplies special systems for cold curing in different ambient temperatures.
Due to this trenchless restoration a new plastic tube with a lifespan of another 50 years emerges in the old sewer tunnel.