The Chapin 3.5 Gallon Concrete Curing Compound Sprayer 1949 is a high quality concrete sprayer for professional applications. It is lined with TRI-POXY steel for triple protection against corrosion, rust and damage from denting. The 48" heavy duty reinforced hose has a nylon braid and a vinyl core that resists chemical attack, crimping, cracking and leaking and it has threaded fittings for changing hoses easily.