When blasted through a foam gun, McKee's 37 extreme foam formula is at its best because its the only car shampoo formulated for foam guns. The high soap to water ratio produced by a foam gun allows this intense shampoo to produce frothy foam unlike any shampoo you've used before. The high viscosity of McKee's 37 extreme foam formula allows the suds to cling to the vehicle in order to begin grabbing dirt and oil on contact. With the help of a soft, clean sponge or mitt, you'll achieve an extreme clean with this super-sudsing car wash. A lot of soaps can clean, but they cant leave the kind of shiny, smooth finish created by McKee's 37 extreme foam formula. McKee's 37 proprietary cleaning agent builds thick, multi-tiered bubbles that work to lift dirt and grime off the surface of the vehicle. Though it contains effective cleaning agents, McKee's 37 extreme foam formula is ph-balanced to retain the existing paint protection. McKee's 37 extreme foam formula leaves waxes and sealants intact while removing the dirt and debris that hide your vehicles shine.