USER FRIENDLY CRACK-FILLING SYSTEM AND METHOD FOR FILLING CRACKS WITH FOAMABLE POLYURETHANE PREPOLYMER

摘要

A method for filling cracks (90) in concrete surfaces (92) using a one- component, hydrophilic polyurethane prepolymer without the addition of any granular impregnating agents is disclosed. The prepolymer is provided in a hand-held aerosol container (60, 200) and is injected into the cracks (90) through hollow injection ports (56) that are adhered (52) in place on the surfaces (92) over the cracks (90) and subsequently closed off (57, 58, 80) when filled. The crack (90) is filled from the bottom up (56) to prevent the formation of air pockets in the crack (90).