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QUIKRETE® Polyurethane Mortar Joint Sealant from QUIKRETE® Companies, The


QUIKRETE® Polyurethane Mortar Joint Sealant is a construction grade polyurethane sealant designed for waterproofing, sealing and tuck-pointing damaged mortar joints. With excellent adhesion and a non-sag formula, it is perfect for both horizontal and vertical applications.

The sealant is also textured to blend with surrounding mortar, making it an ideal solution for aesthetic mortar joint repairs unlike typical caulks, which are usually un-textured and can leave behind a shiny, gray finish.

QUIKRETE® Polyurethane Mortar Joint Sealant’s unique formula makes it resilient to allow for substrate movement as it can elongate up to 500 percent.

To apply, first clean and dry the repair surface to make sure it is free of loose particles. Cut the tip of the 10 ounce caulking tube at an angle to make a 1/4 inch to 3/8 inch hole. Insert the cartridge into a standard caulk gun and apply by pushing the cartridge tip over the repair surface, forcing the caulk into the crack. The repair will be tack free in two hours and remain permanently flexible.