Surf Guard SB40Surf Guard SB 40 is a 40% active solvent based silane water repellent and impregnating agent for porous masonry surfaces such as concrete, block, brick, & unglazed tile. Surf Guard SB 40 will penetrate and chemically bond deep within the substrate to provide long lasting protection against deterioration or staining due to water conditions. Surf Guard SB 40 will not impair the natural breathing characteristics of treated substrates, nor will it produce
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