The Spray Safe System is a carefully thought out spraying system using compressed carbon dioxide to power a pump that sprays fluid at a constant pressure. Included in the kit is a cart, regulator, pump, wand, and a CO2 canister similar to the ones used for paint guns. The kit also includes five conical-spray pattern tips to gage the flow of material. Because there is no motor or electricity involved, you can spray flammable liquids with solvents such as acetone or lacquer thinner. They also supply a plastic wand for acid-based applications. One CO2 canister will spray 5 gallons of sealer and the canisters can easily be refilled at large retail stores. Patriot Sprayer Systems Inc. 800-592-9320. .