"Drylok Extreme Masonry Waterproofer" has been tested by independent labs to hold back 12 psi of water pressure (a wall of water 26 ft high). The manufacturer, United Gilsonite Laboratories, describes this product as a latex-based, low-odour and VOC-compliant formula. It has a smoother finish for consumers who want a house-paint type look with the waterproofing capabilities of a waterproofing paint. It comes with a 15-year, fully transferable warranty. New "Drylok Extreme" has a mildewcide additive to further prevent the potential for mould/mildew growth on the dry paint film under extreme situations.
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