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WebMay 31, 2024 · Impregnated, Precompressed, Expanding Foam Sealants. Developed in the 1950’s in Europe, the components of impregnated-foam sealants are: 1) open-cell polyurethane or polyether foam, and 2) a water-repelling adhesive impregnation. ... The Sealant Waterproofing and Restoration Institute publishes a 50-page manual, “Applying … WebOct 29, 2012 · When a basement waterproofing technician injects a wall crack, he will typically inject an expanding urethane product. The urethane will enter the crack and expand until it fills it all the way through to the outside soil. The urethane sealant actually makes use of the surrounding soil as a firm barrier to help it create a solid repair. WebUrethane sealants are high-performing, especially in areas with moderate to high traffic, and can typically last five to ten years. Incredibly flexible, urethane sealants are a … nari bath remodlers near port washington wi