Snow Foam & Foaming Washes

Step 1: Prepare the foam solution

• Check the product's dilution ratio, usually somewhere around 1:10 or 1:20.
• Fill the foam cannon bottle, adding the snow foam first and then topping up with water.
• Shake the bottle so the solution mixes properly.

Step 2: Adjust your foam cannon

• Attach the cannon to your pressure washer and make sure the connection is secure.
• Adjust the foam thickness knob to where you want it.
• Set the spray pattern for even coverage.

Step 3: Apply the snow foam

• Work from the bottom up, covering the whole car. Let it dwell for three to five minutes. Do not let it dry on the paint.

Step 4: Rinse it off

• Rinse from the top down with a high pressure rinse, taking the foam and the dirt with it. On a heavily contaminated car, a second layer is worth doing.

Step 5: Move on to the contact wash

• Now hand wash the car, ideally using the two bucket method.

No pressure washer? A foam gun on a garden hose or a pressurised handheld foamer will still lay foam down, just thinner and with less cling than a cannon gives you.

Snow foam is best used as the pre wash before a two bucket contact wash, because its job is to soften and carry off the bulk of the dirt before anything touches the paint.

Some people foam the car and then agitate the foam with a wash mitt. That works as a wash, but it rather defeats the point, since you're putting a mitt into dirt that hasn't been rinsed away yet.

If the car isn't especially dirty and it's protected with a ceramic coating, wax or spray coating, a foam, rinse and dry on its own is a perfectly good maintenance wash.

Snow foam is a pre wash solution designed to loosen and lift dirt before a contact wash, which is what reduces the risk of scratching the paint. Here's how it works:

• Breaks down dirt and grime. The thick foam clings to the surface and softens road film, dust and mud rather than letting it sit there dry.
• Absorbs and lifts debris. As the foam runs off, it carries loose dirt away from the paint with it.
• Minimises swirl marks. Removing the surface contamination first means there's far less left for a mitt to drag around.
• Safe over protection. pH neutral formulas won't strip wax, sealants or ceramic coatings.
• Makes the contact wash easier. Less dirt on the car means fewer passes, fewer mitt rinses and a safer wash overall.

It depends how dirty the car is and what's on the paint.

pH neutral is the default and what most people should reach for. It cleans well, it's safe over wax, sealants and ceramic coatings, and you can use it every wash without eating into your protection. A neutral foam on a weekly car does everything you need.

Alkaline foams hit harder. They're what you want on a car that's been sitting for a month, a work ute, or anything carrying heavy road film and bug splatter. They'll shorten the life of a wax and they're not something to use every wash over a coating, but on a genuinely dirty car they'll do in one pass what a neutral foam takes two to manage.

Acidic and decontaminating foams are a different job again, aimed at iron fallout, water spots and mineral staining rather than general dirt. Those are a periodic deep clean, not a weekly wash.

If you're buying one, buy pH neutral. Add an alkaline foam later if you find yourself wanting more bite.

The snow foams here are safe on all automotive paint systems, plastics, trims and wheels, so any exterior surface on a normal car.

Matte and satin finishes are worth a mention. A pH neutral foam is fine, but avoid anything that leaves gloss or protection behind, since those will patch up a matte finish.

If you've got an unusual surface, bare metal or a wrap you're unsure about, get in touch and we'll point you at something safe.

About five minutes as a rule of thumb.

That gives the foam time to physically cling and drag the dirt down the panel, while the surfactants break down the road film underneath.

The one rule that matters more than the time is not letting it dry. Foam drying on the paint leaves residue you then have to wash off, and in the sun it can happen well inside five minutes. Work in the shade, on cool panels, and if it starts drying at the edges, rinse.

Dwell times vary by product, so read the label before you open the bottle.