The Cre-Away Pro Applicator is a more economical way to apply Cre-Away. Simply insert the steel tube at the end of the hose into the Cre-Away bucket and attach to the gun a small, portable, 1½- to 2-gallon, portable air compressor (sold separately at most home improvement stores). Regulate the air pressure on the compressor to about 20 p.s.i. and blast the Cre-Away Pro up the flue until it is thoroughly coated.