Method for filling cracks in a concrete structure with foamable polyurethane prepolymer
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United States of America Patent
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Oct 30, 2001
Grant Date -
N/A
app pub date -
Feb 11, 1999
filing date -
Feb 11, 1999
priority date (Note) -
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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.
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