Chapin's 19069 Xtreme Concrete sprayer is designed to handle the tough applications by concrete professionals. Xtreme seals are compatible with the harsh chemicals used in professional concrete jobs. Its 3.5 Gal. tank is made with stainless steel tank for durability and the 4 in. W mouth opening makes it easier to clean and fill. The unique Tri-Lock seal feature that locks the pump cap tight.