CUSTOM BLDG PRODUCTS PC0910S-6 10.5-Ounce Natural Caulk The product is 10.5OZ NAT GRY Caulk Easy and simple use kit The product is manufactured in China Interior use only. Resists mold and mildew. Formulated to match polyblend grout colors. For use around showers, sinks, or tubs. Natural gray.