DRYLOK Extreme is the top-rated masonry waterproofer in North America — and for good reason. It withstands 15 PSI of hydrostatic pressure (the equivalent of a 33-foot column of water) without peeling, cracking, or leaching. A single coat fills pores; two coats creates a complete vapor and water barrier. Formulated for poured concrete, concrete block, and brick. One gallon covers 75–100 sq ft in two coats. Works on interior and exterior surfaces.

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