Why Wall Cleaners Matter for a Lasting Paint Finish
Whether you’re decorating a living room, bathroom, or repainting exterior walls, cleaning is the first job. We offer a full range of professional wall cleaners designed to remove stains, prep surfaces and keep mould at bay — even in damp corners behind furniture or around windows and doors.
Different Types of Wall Cleaners for Painted Walls, Outdoor Surfaces and Mould Removal
There isn’t one cleaner for every surface. Some are made for painted walls, while others are strong enough to strip grime from tiles or outside walls. Here’s what to look for:
- Mould remover / mould wall cleaner – kills mould, mildew and prevents regrowth
- Painted wall cleaner / wall paint cleaner – safe to use without damaging your existing paint finish
- Outdoor wall cleaner / facade cleaner – made to remove dirt, algae, moss and pollution build-up
- Degreasers / general wall cleaner spray – ideal for grease, smoke stains or oily residues near cookers
We stock industry-proven products like Glixtone Fungi‑Shield for internal mould, and Centrecoat R05 BF for cleaning up external façades, tile grout, and other hard surfaces. These help remove mould, dirt and grime before it spreads or causes more damage.
How to Choose the Right Wall Cleaners for Your Surface and Paint Type
Choosing the right wall cleaner depends on the surface, type of stain, and whether your wall is bare or already painted. Consider:
- Substrate compatibility – delicate or painted walls need non-abrasive formulas
- Biocidal action – essential when dealing with mildew or mould growth
- Rinse properties – avoid products that leave behind excess residue or streaks
- Environmental safety – choose low-odour, low-VOC options in homes with kids, pets or limited ventilation
- Dilution and strength – for heavy jobs, concentrated cleaners like Rustoleum EpoxyShield Degreaser or Tensid Safety Klean deliver results
Need to clean tile grout or stubborn kitchen grease? Use baking soda, vinegar or a degreaser with a soft sponge. For painted surfaces, milder cleaners like soapy water mixed with washing up liquid will usually do the job. Just make sure to test a small hidden spot first.
How to Clean Walls Before Painting: Tools, Techniques and Tips
Clean walls give you a better surface for paint to stick to. Follow these steps for best results:
- Dust the surface or vacuum to get rid of loose dirt and excess dust
- Lightly dampen the wall with clean warm water to stop streaking
- Apply your cleaner using a spray bottle, bucket or sponge
- Scrub gently with a soft sponge using a circular motion
- Rinse with warm water and wipe dry with a clean cloth
- Let walls dry completely – usually 24 hours – to stop excess moisture getting trapped under the new paint
For greasy areas like kitchens, near cooking hobs or extractor fans, a washing up liquid mix will help break down oils. Add a splash of vinegar or baking soda for stronger cleaning. Be careful not to use too much liquid to avoid soaking floors or tiles.
How to Remove Mould and Prevent It Returning
If your walls are showing signs of black spots or mould growth, you’ll need more than just soap and water. Mould spores spread quickly in damp conditions and can affect your health, cause a smell, and ruin paint.
Use a biocidal mould remover like Glixtone Fungi‑Shield to kill spores and stop regrowth. It works well in bathrooms, behind furniture, or on tiles and tile grout. For outdoors, Centrecoat R05 BF handles algae and moss on external walls and façades.
Make sure to:
- Allow the cleaner to sit for the recommended contact time
- Use light pressure to scrub
- Rinse well with warm water and dry the area
- Improve air circulation to prevent mould from coming back
Open windows, use extractor fans, and repair any leaks that may cause damp. These small changes make a big difference in reducing future problems.
Cleaning Painted Walls Without Damaging the Paint Finish
Everyday marks like fingerprints, scuffs and even smoke residue are common on painted walls. The good news is they’re easy to clean with the right approach:
- Mix warm water and a little washing up liquid in a bucket
- Use a soft sponge or microfibre cloth
- Wipe gently in sections, working top to bottom
- Avoid soaking the wall – use just the right amount of moisture
- Dry with a clean cloth or towel to prevent streaks
This method works for most marks, including mild stains near doors, furniture or along skirting boards. For stubborn marks, try a touch of baking soda on the sponge. Avoid harsh scrubbing to stop damage to your paint finish.
Why Use Professional Wall Cleaners for Specialist Jobs
For bigger projects or tougher stains, it’s worth using commercial-grade wall cleaners or calling in professionals. This is especially useful when dealing with:
- Old or historic buildings
- Large commercial walls exposed to pollution or graffiti
- Removing paint, smoke stains or years of dirt
Products like Centrecoat R08 and R09 lines are made for these tasks. They’re stronger than household cleaners but safe for the right surface. Pros also know the correct scrubbing techniques and how to rinse without damaging the wall.
This approach gives you better long-term results and makes your next paint job last longer.
Outdoor Wall Cleaners: Tackle Grime, Mould and Algae on Exterior Walls
Outside walls take more punishment from weather, traffic, and nature. Rain, dirt, moss, and bird droppings can all stain your surface. To clean them:
- Brush off loose dust and dirt
- Apply an outdoor wall cleaner or mould remover
- Scrub with a soft sponge or stiff brush (for rough surfaces)
- Rinse well using a hose or pressure washer
- Let dry and apply a fungicidal wash to prevent mould returning
Use products like Centrecoat R05 BF for stone, render, or painted outdoor walls. These stand up to weather and provide a clean base for repainting or sealing. For persistent stains, stronger degreasers like Rustoleum EpoxyShield Degreaser or Rocan PureKleen DP can help restore the original colour.
Promain’s Full Range of Trusted Wall Cleaners
At Promain, we supply everything from gentle painted wall cleaners to powerful degreasers and mould treatments. Whether you’re touching up a living room or cleaning a commercial site, our products are trusted by painters, decorators, and tradespeople across the UK.
Our stock includes:
- Glixtone Fungi‑Shield Fungicidal Wash
- Centrecoat R05 BF Facade Cleaner
- TOR TorStrip ABS Water-Based Stripping System
- Rustoleum EpoxyShield Degreaser 2901
- Teknos Rensa Facade Cleaner
- Rocan PureKleen DP
- Tensid Safety Klean
- Mapei UltraCare Kerapoxy Cleaner
Need help choosing? Just contact our technical team — we’ll recommend the right solution for your job.
Ready to Clean Walls? Get the Right Wall Cleaners Today
Whether you're a homeowner or a trade professional, using the right cleaner means your paint finish will last longer and look better. Tackle mould, remove dirt, and prep surfaces properly with the right wall cleaner.
Get Started: Order Professional Wall Cleaners or Ask for Advice
Explore our full range of wall cleaners, degreasers and mould remover products online or speak with our team. We’ll help you find exactly what you need for your next painting project — no guesswork, no streaks, no missed spots.
Frequently Asked Questions
Q: What is the best thing to clean your walls with?
A: Use warm water, washing up liquid and a soft sponge for most jobs. For tougher stains or to remove mould, choose a specialist mould remover or degreaser.
Q: What can I wash my interior walls with?
A: A bucket of soapy water and a soft sponge works for light marks. Always test the cleaner in a hidden spot first to avoid streaks or paint damage.
Q: How do professional painters clean walls?
A: They vacuum away excess dust, then use products like sugar soap or degreasers, depending on the wall. Rinsing is done with warm water, followed by a drying period to avoid trapping excess moisture.
Q: How to clean walls without leaving streaks?
A: Avoid over-wetting. Use two buckets – one for washing, one for rinsing. Work top-down, dry the wall after cleaning, and open windows or use fans to improve airflow.