Foam Cannons are unlike any washing medium you've ever used before! Only the foam cannons can delivers a thick, frothy foam that clings to your vehicle. Dirt and grease begin loosening their hold on your vehicle immediately. Foam cannons works with a pressure washer. The high pressure water combined with the cleaning power of the car shampoo make washing easier. Often, you'll find less agitation is needed to remove grime. Only 1 ounce of a high yield car wash makes a tremendous amount of foam. Because it works with a pressure washer, the foam cannons use less water than the conventional bucket-and-hose method of washing. You'll be blown away by the performance of your foam cannon!