The Chapin industrial concrete sprayer has a 3.5 gal Tri-Poxy lined steel tank that provides triple protection against rust, corrosion and damage from denting. Featuring Xtreme Seals that are resistant to the most extreme chemicals. This sprayer can keep up with the higher solids and ever changing chemical compositions of today's solvents and accelerators. Also compatible with petroleum solvents. Offering a large 4 in mouth opening for easy filling and cleaning, brass wand, brass shut-off, brass fan tip nozzle for even coverage, a 48 in reinforced hose with threaded fittings and FKM seals for most concrete sealer applications (check chemical manufacturers instructions before use). Our open head tanks have a unique tri-lock seal that ensures the pump cap locks tightly into place.