Smith Performance Sprayers S103E 3.5-Gallon Stainless Steel Concrete Sprayer for Solvent or Water-Based Cleaners, Sealers, Release Agents and Curing Compounds 3. 5 gallon capacity AISI-304 grade stainless steel tank (no need for epoxy coatings) built to withstand harsh concrete chemicals along with rugged transport and use Brass, 24 inch wand containing a no-drip valve stem and shut off with the highest quality Viton seals for maximum chemical resistance Four prong locking mechanism secures the pump tightly against an internal O-ring and also prevents over compression Faster, easier repair - pump seals can be changed within minutes, which equals less downtime Pull-button pressure release valve safely releases internal pressure prior to opening the tank