Dry Treat Stain Proof Plus is an impregnating, invisible and breathable sealer that protects exposed natural stone, tiles, pavers, concrete and grout from damage caused by water, salts and oil-based stains. Treated indoor and outdoor surfaces become easier to clean, maintain, and keep looking good for longer. Dry Treat Stain Proof Plus provides lasting protection for natural stone, concrete, terracotta tile, cast stone, paving, sandstone, limestone, brick and grout.