What is better, foam gun or foam cannon?

What is better, foam gun or foam cannon?

Foam cannons generally outperform foam guns for anyone regularly washing vehicles, since they attach directly to a garden hose or pressure washer and produce thicker, longer-lasting foam that clings to the surface, giving soap more time to lift dirt before rinsing. Foam guns, which typically attach directly to the pressure washer wand, tend to produce thinner foam and require closer proximity to the surface, increasing the risk of paint contact damage on vehicles specifically. For general exterior cleaning like siding or driveways where foam thickness matters less, a standard foam gun setup is perfectly adequate and often less expensive. For car enthusiasts prioritizing a gentler, more thorough pre-wash foam stage, a dedicated foam cannon is widely considered the better investment, even though it adds an extra piece of equipment to store and maintain.