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The original DryLok formula has been protecting basements since the 1950s and is the benchmark for latex masonry waterproofers. The 5-gallon latex-base formula covers 500–750 sq ft and resists up to 10 PSI of hydrostatic water pressure. Its long track record means it's stocked at virtually every hardware store in America — critical when you need to buy and apply it quickly after a flood event.
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