The injection method is a proven method for partial sealing in sewer rehabilitation.

The injection material is injected under pressure into the pipe environment via existing or artificially enlarged leaks. The sealing effect is achieved from the outside to the inside - primarily behind the pipe wall. In this way, existing cavities and contiguous porous areas in the bedding area can be filled. Adhesive surfaces in the pipe wall for bonding the material can generally be dispensed with. The reason for this is the continuous supply of material via hose systems, which ensures a sufficient quantity of injection material until the reaction begins. The injection material is subject to special hygiene requirements. F. Willich products are certified and approved accordingly.