these chemicals meet at the tip of a spray gun. When they meet, they react to each other and create a foam solution. This foam then dries in place and creates an effective air and vapor barrier.

Foam guns make car washing much easier ... which means less chance of dirt getting back onto your paint. There are also air ...

The best way to achieve that car-wash shine without that expensive car-wash price is by using a foam cannon. Also known as a soap gun, a foam cannon automatically mixes car-wash soap with water ...