Self-serve bay chemistry
Self-Serve Car Wash Soap & Chemicals for Coin-Op Bays
Six bay functions, from tire cleaner to ceramic wax, that give your customers a showroom clean and give you a reason to sell the top setting.

- 6 functions tire cleaner to ceramic wax
- Phosphate-free high-pressure and brush soap
- Ceramic wax premium top setting
- Bulk delivery we deliver to your bays
How a self-serve bay works
How a Self-Serve Car Wash Works
In a self-serve car wash, customers choose each function on the bay selector and apply it with a high-pressure wand or foam brush. Every setting is a different chemical, so each one has to work fast, foam well and look good to the customer holding the wand.
The right self-serve car wash supplies make the difference between a quick rinse and a showroom finish that brings customers back. Bright foam, pleasant fragrances and a premium ceramic step also raise the average ticket.

Wash process
How to Use a Self-Serve Car Wash in 6 Steps
Post these steps in your bays. Each step uses one CarWashSoap.com product.
1
Bay step 1 · Tire cleaner
Clean wheels and tires
Customers start with the dirtiest part of the car so brake dust doesn’t get spread around.

Road Rage is a heavy-duty alkaline tire and wheel cleaner that removes tough road soil and brake dust, and brightens white walls and raised letters. Biodegradable.
2
Bay step 2 · Presoak
Loosen dirt and road film
A high-pH presoak dwells on the paint and softens bugs, pollen and road film before the high-pressure rinse.

Purple Presoak is an aluminum-safe alkaline foaming presoak that is highly effective on bugs, pollen and tree sap. Bright purple foam and a grape fragrance make the bay memorable.
3
Bay step 3 · High-pressure soap
Blast away soil
The high-pressure soap setting cleans and rinses loosened soil off every surface.

Knockout is a highly concentrated, phosphate-free high-pressure detergent that packs a punch against tough grime while keeping product use low.
4
Bay step 4 · Foam brush
Deep clean with the foam brush
Foaming car wash soap through the brush adds lubricity for a gentle scrub and extra shine.

Bubblicious is a phosphate-free, biodegradable foaming brush soap that gives a gentle clean and shiny finish in friction use.
5
Bay step 5 · High-pressure wax
Protect and bead water
Spray wax bonds to paint for beading, gloss and better visibility in rain.

Rainshield is a high-pressure wax with a polymer system that bonds to the surface to protect shine and paint and repel rain, improving windshield visibility.
6
Bay step 6 · Ceramic wax
Finish with ceramic protection
A premium ceramic step gives customers a reason to choose the top setting.

Silk is a ceramic wax that forms a hardened, hydrophobic layer to repel water, dirt and contaminants and protect against sunlight and oxidation. It also reduces wiper chatter.
Finish with a spot-free rinse if your bay offers it, then let the car air dry.
Upsell the top setting
Regular Wax vs. Ceramic Wax
| High-pressure wax (Rainshield) | Ceramic wax (Silk) | |
|---|---|---|
| How it works | Polymer system bonds to the surface | Forms a hardened, hydrophobic ceramic layer |
| Durability | Needs more frequent reapplication | Chemically bonds for months of durability |
| Customer benefit | Water beading, gloss, better rain visibility | Repels water and dirt, protects against sun and oxidation, reduces wiper chatter |
| Where it fits | Standard bay step | Premium top setting |
Watch
See the Self-Serve Wash Process
For operators
Run a Better Self-Serve Car Wash
Bulk delivery
Place your order and we deliver concentrate to your site, so bays never run dry.
On-site signage
Show customers each bay step and premium option with on-site signage.
Organized equipment room
Store and draw chemicals without heavy drums using the EZ System.
FAQ
Self-Serve Car Wash Chemicals FAQ
What chemicals does a self-serve car wash need?
A self-serve bay typically runs six functions: tire cleaner (Road Rage), presoak (Purple Presoak), high-pressure soap (Knockout), foam brush soap (Bubblicious), high-pressure wax (Rainshield) and ceramic wax (Silk), followed by a spot-free rinse.
How do you use a self-serve car wash?
Clean the wheels with tire cleaner, apply presoak and let it dwell, wash with high-pressure soap, scrub with the foam brush, then apply high-pressure wax and ceramic wax. Finish with spot-free rinse if the bay offers it and let the car air dry.
What is a spot-free rinse?
Spot-free rinse is purified water, usually made by reverse osmosis, with the dissolved minerals removed. Because nothing is left behind when it evaporates, it rinses away soap and wax without leaving water spots.
What is the best foaming brush soap for a self-serve bay?
Bubblicious is a phosphate-free, biodegradable foaming soap made for foam brushes. It adds lubricity for a gentle clean and leaves a shiny finish.
Do self-serve car wash foam brushes scratch paint?
A foam brush loaded with a lubricating foaming soap glides over paint instead of dragging grit across it. Customers should rinse the brush first and apply presoak and high-pressure soap before scrubbing, so most grit is gone before the brush touches the car.
What is Road Rage?
Road Rage is a heavy-duty alkaline detergent that removes the toughest road soil and brake dust from wheels. It brightens white walls and raised letters and is biodegradable.
What is Purple Presoak?
Purple Presoak is an alkaline foaming presoak that is safe on aluminum and highly effective on bugs, pollen and tree sap. It produces bright purple foam with a grape fragrance.
What is a high-pressure car wash detergent?
A high-pressure detergent is the main soap setting in a self-serve bay. Knockout is highly concentrated for economical use and phosphate-free.
What is the difference between regular wax and ceramic wax?
Regular wax sits on the vehicle’s surface and needs frequent reapplication. Ceramic wax chemically bonds to the surface for months of durability and enhanced shine.
How does Rainshield protect vehicle paint?
Rainshield uses a polymer system that bonds to the vehicle’s surface to protect shine and paint and repel rain, which also improves windshield visibility.
How can I make my self-serve wash more visible?
Use on-site signage that shows customers the bay steps and premium options. See our on-site signage products.
How do I organize my self-serve equipment room?
Use the EZ System car wash chemical storage tank to pour, move and draw chemicals without heavy drums, minimizing downtime and drum loading.
How do I get started with CarWashSoap.com?
Fill out the form on this page or call (952) 985-9993. A chemical specialist will follow up to learn about your wash and walk you through product options and bulk delivery.
Related guides: What chemicals do you need to run a car wash? · Car wash presoak guide · High-pH vs low-pH presoaks · Triple foam polish vs conditioner · What is a car wash drying agent?
Car wash chemicals by wash type: Express tunnel car wash chemicals · In-bay automatic car wash chemicals · Truck wash soap for fleets
Get started
Build a Year-Round Self-Serve Chemical Program
Tell us about your bays and how we can help your car wash business. A chemical specialist will follow up with options that fit your wash.
- Tell us about your wash Fill out the form or call us.
- Plan your year-round program Review product options with a specialist for your equipment, water and seasons.
- Bulk delivery Chemistry delivered in bulk, by our trucks or freight.
Prefer to talk? Give us a call › Keep your backroom organized with the EZ System chemical storage tank.
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