Duel Autocare
Assault
Pre-Wash Snow Foam
Size
Assault is our thick, high-foaming pre-wash snow foam. Loaded into a foam lance it clings to the panels and keeps working as it dwells, softening and lifting road grime and traffic film so most of it rinses straight off before your wash mitt touches the paint. Best of all, it's safe on your existing wax and sealants — so you can foam every single wash without stripping your protection.
At A Glance
Why You'll Love It
Most swirl marks come from washing, not driving. By lifting the loose grime before you make contact, Assault removes a lot of the grit that a wash mitt would otherwise drag across your paint.
The high-foaming formula sits on vertical panels instead of sliding straight off, so it keeps working through the whole dwell time rather than running to the floor in seconds.
Assault won't strip your wax or sealant, so there's no trade-off between a proper pre-wash and keeping the protection you've already put on. Foam every wash with confidence.
Around 50ml covers a whole car, so even the smallest bottle lasts a run of 10 washes. The 5 litre works out far cheaper per foam — use the value calculator below to see the difference.
What Does Assault Actually Do?
Traffic film is the dull, greyish layer that builds up on a car between washes — a mix of road grime, exhaust residue and brake dust that clings to the paint. A snow foam is an essential part of a proper wash: you cover the car in a thick layer of foam, let it dwell, and rinse away everything it has loosened before you ever pick up a wash mitt.
Assault is alkaline, which is the right end of the pH scale for breaking down road grime and light grease. The thick, clinging foam holds that active mix against the paint long enough to soften the film, then carries a good deal of it away with the rinse. It's tuned to clean effectively while staying safe on your existing wax and sealants, so it lifts dirt without stripping the protection underneath.
That pre-wash stage matters more than it sounds. Almost all the fine scratching you see in direct sunlight comes from dirt being dragged across paint during washing — so the less grit there is when you start, the less damage each wash does. It's a difference you notice over years, not in a single afternoon.
Is It Right For You?
- Anyone with a foam lance or foam cannon who wants a proper two-stage wash
- Regularly maintained cars with light to moderate road grime and traffic film
- Anyone who has waxed or sealed their car and wants a pre-wash that won't strip it
- People who want to reduce swirl marks and fine scratching over time
- Enthusiasts who enjoy a thick, satisfying foam as part of the routine
- Weekend washers who want professional results without a complicated process
- Your car carries heavy, ingrained winter grime, farm mud or road salt — Nitty Gritty is the stronger degreaser for that
- You don't have a foam lance or pressure washer — Nitty Gritty can be applied with a simple pump sprayer
- You want the gentlest possible foam to maintain a ceramic coating between washes — Engage is our pH-neutral snow foam
- You're looking for the contact-wash step rather than a pre-wash — Bahama Blue is the shampoo
- All paint types and colours
- Existing wax and sealants
- Glass
- Plastic trim and rubber seals
- Any surface where the foam could dry before rinsing
- Applying in direct sunlight or on hot panels without working section by section
How To Use Assault
Start with a thorough rinse using a hose or pressure washer. This clears the loose debris so the foam can reach the traffic film underneath rather than sitting on top of dried mud.
Add 50ml of Assault to your foam lance bottle and top it up with 450ml of water — one simple mix, enough to foam a whole car. See the mixing guide below.
Cover the entire exterior in an even layer of foam. Pay particular attention to the lower panels, sills and wheel arches, where traffic film builds up most.
Let the foam dwell for three to five minutes, and gently agitate stubborn areas (badges, window rubbers and or grills) with a soft detailing brush. Don't let it dry on the surface — in warm weather or direct sun, work one section at a time.
Rinse the whole vehicle with clean water using your pressure washer. The paint should look visibly cleaner before you move on to your contact wash with shampoo.
Dilution
One simple mix, every time — add 50ml of Assault to your foam lance bottle and top it up with 450ml of water. That's enough to foam a whole car, so there's no guesswork about strength. Never allow Assault to dry on the surface, and always rinse thoroughly after every application. For more on how dilution ratios work, read our dilution ratios guide.
H315 — Causes skin irritation.H318 — Causes serious eye damage.P264 — Wash hands thoroughly after handling.P280 — Wear eye protection, protective gloves.P305+P351+P338+P310 — IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a doctor.| Product type | Pre-Wash Snow Foam |
|---|---|
| Format | Alkaline concentrate |
| Sizes | 500ml · 1 Litre · 5 Litre |
| Application | Foam lance or foam cannon |
| Dilution | 50ml product : 450ml water (fixed, per vehicle) |
| Dwell time | 3–5 minutes |
| Rinse required | Yes |
| Scent | Apple |
| Safe on protection | Wax and sealants |
| Suitable for | All paint types and colours |
| pH | Alkaline · pH 11–12 |
| Physical state | Liquid |
| Colour | Green |
| Storage | Store in a well-ventilated place. Keep cool. |