Patent Number: 6,309,493

Title: Method for filling cracks in a concrete structure with foamable polyurethane prepolymer

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

Inventors: Braun; Robert (New Lenox, IL), Dobrez-Florez; Diana (Crest Hill, IL), Garcia; Jess (Warrenville, IL), Schutter; Deborah (Minooka, IL)

Assignee: Flexible Products Company

International Classification: E04G 23/02 (20060101); B29C 065/52 (); B29C 073/02 (); B29C 073/10 (); B29C 073/12 ()

Expiration Date: 10/30/2018