Oct 25, 2023 · Waterproofing Masonry Coating - Satin LX21–50 Series . 10/2023 www.sherwin-williams.com continued on back . CHARACTERISTICS . Loxon XP is an exterior, high build coating that provides excellent flexibility, and durability, weather resistance. This product will protect against winddriven rain when used on concrete, - CMU, stucco and shotcrete ...