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Cleaning Your Carwash Walls


Regular cleaning of car wash walls helps maintain a clean, inviting and professional appearance. It also prevents the build-up of dirt and chemical residues, reduces mould and mildew growth, and extends the life of wall tiles or cladding.

A simple daily rinse-down can go a long way and will help extend the time between deep cleans and will make periodic cleaning much easier.

Just like we protect a vehicle’s surface, we can also protect our wash bay walls. Applying a protectant after cleaning helps prevent dirt and contaminants from sticking to the surface. Some sites are already doing this by rinsing walls with a high-pressure Ceramic or Graphene wax after cleaning, leaving behind a protective coating that keeps walls cleaner for longer.

DEEP CLEAN BAY WALLS

Safety first

  1. Wear appropriate personal protective equipment (PPE). A handy PPE kit is available on our website, CLICK HERE.
  2. Place warning signs around the work area and turn off carwash bay or put LaserWash into maintenance mode.
  3. Check environmental factors and weather – Wind can be a hazard if you have customers down stream from where you are cleaning, they can be affected by overspray.
  4. Follow manufacturer instructions and dilution rates for all cleaning chemicals. Link HERE. for our Xtreme Clean Wall Cleaner SDS.
  5. Never mix cleaning chemicals as chemical reactions can occur.

Equipment and supplies

  • Pressure washer, either stand-alone, washdown / bay pump
  • Soft-bristle brush or wall scrubber
  • Extension pole for the hard-to-reach places
  • Pressurized spray bottle
  • Bucket (wide and low design works best)
  • Safety glasses, waterproof gloves, non-slip footwear
  • Wet floor signs or safety barriers
  • Xtreme Clean HF - Keep an eye out for our July special offer

CLEANING PROCEDURE

Step 1: Prepare the area

  • Block off the carwash bay and isolate equipment.

Step 2: Apply cleaning solution

  • Mix the cleaning solution according to the manufacturer's recommendations.
  • Apply evenly to the wall surface using a sprayer.

Note: Apply product from bottom to top of wall to reduce the risk of streaking

  • Allow the solution to dwell for 5–10 minutes or as directed.
  • Do not allow the cleaner to dry on the surface.

Step 3: Scrub down wall

  • Focus on stubborn areas - Using a brush, or foam applicator.

Step 4: Rinse thoroughly

  • Rinse from top to bottom – For best results, if you are in a bay with HOT high-pressure soap this can help with dirt, grime and grease removal.
  • Check for remaining stains and repeat cleaning if necessary.

Results

Walls should be clean and free from visible dirt, soap scum, mould, mildew, and chemical stains - creating a fresh, well-presented carwash bay. A well-maintained environment helps position your site as the “wash of choice” for customers.

Great before and after photo below:

Don’t wait for walls to be unrecognisable…. if they are dirty – give them a clean!

Some supplies that can make wall clean less of a chore:

Wide low bucket for easy use and less likely to spill.

Small scrubber for spot cleaning.

Scrubbing pad with handle connection for whole wall scrub.


Telescopic handle for use with above pad.


ADDITIONAL SAFETY GUIDANCE FROM OUR IN-HOUSE LABORATORY MANAGER, NIRU

HF-based wall cleaners are highly effective at removing mineral deposits, cement residues, rust stains, efflorescence, and other inorganic contaminants from masonry, brick, concrete, and building surfaces. Due to the hazardous nature of hydrofluoric acid, appropriate precautions must be taken during handling and use.

Personal Protective Equipment (PPE)

  • Chemical-resistant gloves
  • Safety goggles or face shield
  • Protective clothing
  • Enclosed footwear

Safe Handling

  • Read and follow the SDS before use.
  • Avoid skin and eye contact.
  • Use in well-ventilated areas.
  • Do not mix with other chemicals.
  • Rinse treated surfaces thoroughly after application.
  • Emergency Preparedness

    HF can penetrate skin and cause serious tissue damage. Calcium Gluconate Gel should be readily available wherever HF-containing products are used or stored. In the event of exposure, immediately flush with water, apply Calcium Gluconate Gel as directed, and seek urgent medical attention.

    Storage

    • Store in the original container.
    • Keep tightly closed in a cool, dry location.
    • Protect from direct sunlight and heat.

    Always follow site safety procedures and the product SDS when handling HF-based cleaners.

    © DuBois Chemicals Australia P/L
    Author: David Politino
    Date Published: 12 June 2026
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