This Old Grout & Stone’s most advanced outdoor sealer combines two powerful chemistries into one complete sealer for outdoor substrates. The combination of advanced surface protection with the organic bonding deep within the substrate, produces a sealer that provides not only the most advanced protection from acid rains, microscopic organic degradation, and U.V. breakdown, but also a true strengthening of the stone that helps defend against high alkali soil and salt intrusion. The result, Outdoor SB, the most advanced chemistry available to effectively protect the entire stone from the harmful outdoor elements for years to come.
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