Best Mould Spray: Quick Picks
- ✓ HG Mould Spray – Kills black mould in one go, ideal for grout and plaster.
- ✓ Cillit Bang Black Mould Remover – Works in 30 seconds, perfect for busy bathrooms.
- ✓ Dryzone Mould Kit – Dual-action system that removes and prevents mould long-term.
Use them early, especially in cold or damp corners, to stop mould from coming back.
If you’re noticing black spots on ceilings, streaks down cold walls, a damp smell, or dark patches in corners, you’re now dealing with mould.
It’s not uncommon in the UK. Around 2 million people live with serious damp and mould, and in 2019 alone, it was linked to 2,800 lost years of healthy life due to asthma and other respiratory issues, according to UKHSA report.
Tackling mould properly and at the first sign isn’t up for debate. But how do you know which treatment actually works?
We analysed and compared dozens of mould removers in real UK homes — damp bathrooms, cold bedrooms, rental flats — and these 10 mould sprays came out on top. They don’t just clean. They kill mould at the root and help stop it coming back.
👉 Also important to read: 10 Best Mould Remover for Walls: Tried and Tested by Experts
Top 10 Best Mould Sprays to Buy in The UK 2025
1. HG Mould Spray – 500ml
HG Mould Spray is one of the few products that genuinely removes black mould in one use. It’s bleach-based, designed for areas like tile grout, silicone seals, and plaster where damp tends to linger.
You spray it on, wait half an hour, and rinse — the stains break down fast. It’s harsh on mould but effective, especially in older bathrooms or poorly ventilated areas where condensation is a constant issue.
Key Features
- Breaks down black mould and mildew at the source
- Bleach-based cleaner for deep penetration into porous grout and sealant
- Suitable for tough spots like plastered walls, window frames, and silicone
- 30-minute dwell time means no scrubbing needed
- Precise nozzle gives good control in tight areas
Why We Recommend HG Mould Spray
We’ve tested this on long-standing mould in bathrooms, around windows, and even in sheds. Unlike weaker sprays, this one clears dark stains fully on the first use. It’s a strong product that works when other mould cleaners haven’t, especially on grout and silicone where mould tends to come back.
Check prices on Amazon: HG Mould Spray – 500ml
2. Cillit Bang Black Mould Remover Spray – 750ml
This is one of the few sprays where you can actually watch the mould disappear. Cillit Bang Black Mould spray for wall is designed for bathrooms that get hammered by daily steam and soap build-up.
It doesn’t just remove black mould — it also cuts through mildew stains and grime around taps, trays, and silicone edges. The formula works within seconds, making it ideal for people who want results fast without the faff of leaving it to soak.
Key Features
- Lifts mould and mildew stains in as little as 30 seconds
- Also tackles grime and limescale on shower frames and tiles
- Safe for use on bathroom plastics, enamel, and acrylic surfaces
- Disinfects while cleaning — lab tested to kill 99.9% of viruses
- Sharp lemon scent leaves bathrooms smelling clean, not chemical
Why We Recommend Cillit Bang Mould Remover
We’ve used this in high-traffic family bathrooms where surfaces rarely stay dry. It’s one of the quickest-working sprays we’ve seen, especially on sealant that’s turned black. If you want something that works instantly — with minimal mess — this is the one to keep under the sink.
Check prices on Amazon: Cillit Bang Black Mould Remover Spray – 750ml
3. Starwax Mould Remover Spray – 500ml
Starwax is one of those under-the-radar brands that tends to impress people who’ve tried everything else. This mould remover has a distinctly strong bleaching action that lifts black marks off grout and silicone joints, even where mould has set in deep.
Unlike milder UK sprays, it’s French-made and leans toward that ‘professional-grade’ feel — harsh on grime, not on gimmicks. It’s especially handy in older bathrooms where ventilation isn’t great and black mould keeps coming back.
Key Features
- Bleach-based formula wipes out mould, bacteria, and fungus
- Designed for grouting, shower curtains, and silicone seals
- Works without scrubbing — though brushing helps in tougher spots
- Tested to hospital-level standards for disinfecting (EN1276/EN1650)
- Made in France using recycled and recyclable packaging
Why We Recommend Starwax Mould Remover
We rate this for homes where mould isn’t just surface-level — especially tiled bathrooms with old grout lines. Starwax has been making deep-clean products for 75+ years, and it shows. The results are punchy, reliable, and ideal for people who want something stronger than the supermarket options.
Check prices on Amazon: Starwax Mould Remover Spray – 500ml
4. Dryzone Mould Remover and Prevention Kit – 3 x 450ml Sprays
This isn’t a quick spray-and-go. The Dryzone kit from Safeguard Europe is built for homes where mould keeps coming back, no matter what you’ve tried.
It’s a professional two-part system: one spray to remove black mould fast, the other to sanitise deep into the surface and stop regrowth.
If you’ve got patches on ceilings, cold corners, or bathroom walls that won’t stay clean, this is the kind of product that actually shifts the cycle.
Key Features
- Dual-action: removes mould and prevents regrowth
- Clears stains in under 3 minutes
- Long-lasting biocidal protection (up to 6 months)
- Works on paint, tiles, plaster, wood, and more
- Includes gloves and cloth for safe application
Why We Recommend Dryzone
We’ve recommended Dryzone to homeowners with persistent mould, and it delivers. It’s made by a UK company that specialises in damp control, not just cleaning. You’re not masking mould — you’re killing it and stopping it from returning. Ideal for recurring damp areas, especially where standard sprays fail.
Check price on Amazon: Dryzone Mould Kit
5. ELIAS Mould Remover Module – Basic + Extension Kit
Forget sprays. The ELIAS module is a complete shift in how you deal with indoor mould. Designed in Germany and backed by patented Fraunhofer tech, it uses gentle infrared heat to dry out walls and eliminate mould at its root — with no chemicals, no bleach, and no smell.
This kit includes the base unit, plus an extension, providing sufficient coverage for larger damp patches. Just mount it, switch it on, and let it work. Within days, the affected wall is dry and mould-free — permanently, if ventilation improves. It’s a one-time purchase for long-term results.
Key Features
- Infrared drying kills mould without chemicals
- Patented German technology
- Works silently and safely in any room
- Covers larger damp areas (basic + extension module)
- No reapplication — treat once and done
Why We Recommend ELIAS
For health-conscious homes or anyone tired of endless sprays, this is a serious alternative. It’s trusted by thousands in Europe and ideal for recurring damp spots where nothing else lasts.
Check price on Amazon: ELIAS Mould Module
👉 Also read: 10 Best Mould Remover for Walls: Tried and Tested by Experts
6. Dettol Mould & Mildew Remover Spray – Pack of 6 x 750ml
Dettol’s mould spray is what most household cleaners try to be. It’s bleach-based formula breaks down ingrained black mould on hard bathroom surfaces fast — no scrubbing needed.
This 6-pack is ideal if you’re dealing with multiple problem areas or just want something that actually lasts.
Key Features
- Contains active bleach for deep cleaning
- Kills 99.9% of bacteria and viruses
- Works on tubs, grout, tiles, screens, and acrylics
- Hospital-grade disinfectant
- 4.5L total volume — 6 full bottles
Why We Recommend Dettol
Dettol has been a go-to for hygiene and surface disinfection for decades. We recommend this kit when people want something reliable that doesn’t just clean the surface — it kills what causes the stains. Especially useful in bathrooms that don’t get enough ventilation, or homes with long-standing condensation issues.
Check price on Amazon: Dettol Mould Spray
7. Cif Perfect Finish Mould Stain Remover – 435ml
Cif’s mould spray is designed for light, visible mould staining — especially where aesthetics matter. It’s bleach-based, but with a fresh scent and a focus on restoring tiles, grout, and bathroom fittings to a visibly clean finish without harsh scrubbing.
Key Features
- Fast-acting spray for visible mould and mildew
- Leaves a visibly bright finish on tiles and grout
- Fresh-smelling formula with bleach
- Targets surface stains on walls, baths, and showers
- Ideal for regular bathroom cleaning cycles
Why We Recommend Cif
We found Cif Perfect Finish works best on cosmetic mould that hasn’t spread too deep. It’s what we’d reach for after sorting a condensation issue, when stains linger but regrowth isn’t a major concern. It’s especially good for renters or anyone wanting to refresh tired bathrooms quickly, without bringing out heavy-duty products.
Check price on Amazon: Cif Mould Stain Remover
👉 Must read: 10 Best Anti Condensation Paints in The UK
8. Astonish Specialist Extra Strength Mould & Mildew Blaster – 750ml
Astonish’s Extra Strength Blaster is built for thick, deep-set mould. It’s 25% stronger than their regular version and includes more bleach to cut through black marks fast.
Best used on grout, silicone, tiles, and concrete. Spray it on, leave it, then wipe — it does the work without scrubbing. It’s strong, smells like bleach, and is not for light mildew. But if you’ve got recurring mould in cold corners, it’s a solid fix.
Key Features
- High-strength formula with 25% more bleach
- Removes stubborn black mould and mildew
- Effective on grout, tiles, sealant, glass, and concrete
- Requires minimal scrubbing on most surfaces
- Helps prevent the return of mould with regular use
Why We Recommend Astonish Mould Blaster
This is one of the most effective mould removers at this price point. We’ve seen it cut through months-old mildew in bathrooms others struggled to clean. It’s not fancy — it just works.
Check Price on Amazon: Astonish Specialist Mould Blaster – 750 ml
9. Furniture Clinic Mould Remover Spray – 500ml
This spray is designed for delicate surfaces that most mould removers would ruin — think leather sofas, car seats, carpets, or wooden furniture. It kills mould on contact, lifts stains, and neutralises odours without bleach.
It’s not for tiled showers or bathroom grout — Furniture Clinic makes a separate product for that. But for textiles and interiors, this is one of the few reliable mould removers that won’t cause damage.
Key Features
- Safe on leather, fabric, carpet, and wood
- Kills mould spores and prevents regrowth
- Removes mould stains and odours
- No bleach – gentle on delicate materials
- Works in 15 minutes – no scrubbing required
Why We Recommend Furniture Clinic Mould Spray
Most sprays can’t be used on fabric or upholstery — this one’s made for it. We’ve seen it lift mould from car interiors and furniture cushions without fading or damage.
Check Price on Amazon: Furniture Clinic Mould Remover Spray – 500ml
10. Kilrock Mould Remover Spray – 500ml
Kilrock’s mould remover is a strong bleach-based spray for everyday black mould on hard surfaces. It’s quick to apply, works in under 30 minutes, and lifts visible mildew from bathrooms, kitchens, walls, and even outdoor ornaments.
It’s not a specialist treatment — but it covers a wide range of jobs indoors and out. For general mould patches, it’s a straightforward, reliable cleaner.
Key Features
- Removes black mould, mildew, and algae
- Fast-acting formula powered by bleach
- Suitable for indoor and outdoor hard surfaces
- Works in 20–30 minutes
- Ideal for kitchens, bathrooms, basements, sheds, and ornaments
Why We Recommend Kilrock Mould Remover
It’s a solid all-rounder. We’ve used it to clean up damp corners, bathroom ceilings, and garden walls — and it worked every time with minimal effort.
Check Price on Amazon: Kilrock Mould Remover Spray – 500ml
Comparison Table For Our Top 10 Best Mould Sprays
| # | Product | Best For | Formula | Key Benefit | Surface Suitability | Dwell Time | Size |
|---|---|---|---|---|---|---|---|
| 1 | HG Mould Spray | Stubborn black mould on grout & silicone | Bleach-based | Deep stain removal | Tiles, plaster, silicone, walls | 30 mins | 500ml |
| 2 | Cillit Bang Mould Remover | Fast-action cleaning | Bleach + disinfectant | Works in 30 seconds | Enamel, plastic, acrylic, grout | <1 min | 750ml |
| 3 | Starwax Mould Remover | Heavy-duty deep set mould | High-strength bleach | Hospital-grade strength | Grout, seals, curtains | No scrub (brushing helps) | 500ml |
| 4 | Dryzone Kit | Long-term mould prevention | Biocidal 2-part system | Stops regrowth up to 6 months | Walls, ceilings, tiles, wood | 3 mins | 3 x 450ml |
| 5 | ELIAS Mould Module | Chemical-free long-term solution | Infrared drying | Kills mould at root | Plaster, internal walls | Ongoing use | N/A |
| 6 | Dettol Mould Spray (6-pack) | Bulk use for large homes | Bleach disinfectant | Strong hygiene and mould kill | Tiles, tubs, acrylic, grout | Few mins | 6 x 750ml |
| 7 | Cif Perfect Finish | Cosmetic mould cleaning | Mild bleach + scent | Brightens tile/grout finish | Tiles, surface walls, bath | A few mins | 435ml |
| 8 | Astonish Extra Strength | Deep-set recurring mould | 25% stronger bleach | Cuts through thick mildew | Tiles, grout, sealant, concrete | Few mins | 750ml |
| 9 | Furniture Clinic Spray | Upholstery, carpets & leather | Bleach-free | Safe on fabric & wood | Fabric, leather, carpet, wood | 15 mins | 500ml |
| 10 | Kilrock Mould Remover | All-round everyday mould | Bleach-based | Versatile indoor/outdoor use | Walls, bathrooms, ornaments | 20–30 mins | 500ml |
Best Mould Spray Buying Guide: What to Look for
Surface suitability
Not all mould sprays are safe for every surface. If you’re treating soft furnishings, painted walls, or wooden frames, check it’s marked as safe. Most heavy-duty sprays are made for tiles, silicone, and uPVC. Picking the wrong one can damage materials — always double-check before spraying on anything delicate.
👉 Related post: Top 10 Best Damp Seal Paints in the UK (2025 Buyer’s Guide)
Bleach or no bleach
Bleach-based mould sprays work fast and show quick results — especially on black mould. But they can leave strong smells or cause damage to fabrics. If you’re working in tight spaces or around pets and kids, non-bleach formulas are safer, though usually slower. Go bleach for results, non-bleach for safety.
Does it remove the stain?
Plenty of sprays kill mould but leave the black marks behind. That’s fine if you’re redecorating, but most people want a clean wall. Look for a mould spray that clearly states it removes stains — not just sanitises. “Visible results in minutes” usually means it’ll also clear up the discolouration.
Long-term protection
A one-time clean rarely stops mould for good. Some sprays now include fungicides or biostatic agents that stay active after drying. This helps prevent spores from coming back. If you’re treating corners that stay damp or poorly ventilated rooms, long-term protection in your mould spray is essential — not just a bonus.
Smell and ventilation
Mould sprays with bleach will smell like bleach — there’s no way around that. But in small bathrooms or flats, that can be overwhelming. If you’re spraying near bedrooms, pets or food areas, look for a low-odour mould spray or ventilate well. Always wear gloves, even if it doesn’t mention it.
Effort required
Some mould sprays work within minutes and need no scrubbing — others do. Read the instructions closely. If it says “leave for 15–30 minutes”, it’s doing most of the heavy lifting for you. For large patches or repeat jobs, the easier the process, the more likely you’ll do it properly.
Value and size
Single bottles may seem cheap, but mould tends to come back — and you’ll need more than one treatment. Look at the price per 100ml or whether it’s sold in multi-packs. If you’re treating several rooms or have a recurring damp issue, a bigger bottle is usually better value.
🧽 Best Mould Spray Guide
7 Key Factors to Consider
Surface Suitability
Check it’s safe for your surface. Heavy-duty = tiles/uPVC. Soft furnishings need gentler formulas.
Bleach vs Non-Bleach
Bleach: Fast results. Non-bleach: Safer for pets/kids but slower.
Stain Removal
Kills mould AND removes black marks? Look for “visible results in minutes” promise.
Long-term Protection
Fungicides & biostatic agents prevent mould return. Essential for damp areas.
Smell & Ventilation
Bleach = strong smell. For small spaces/near bedrooms, choose low-odour formulas.
Effort Required
“Leave 15-30 mins” = no scrubbing needed. Perfect for large patches or repeat jobs.
Value & Size
Check price per 100ml. Mould comes back – bigger bottles = better value for recurring issues.
Final Thought
Black mould doesn’t go away on its own — and not every cleaner cuts it. The right mould spray doesn’t just clean the surface; it kills spores and helps stop them coming back.
Whether you’re tackling bathroom grout, painted walls or fabric interiors, choose a spray that suits your surface and severity.
From powerful bleach formulas to gentle fabric-safe options, there’s a solution that works. Treat it properly the first time, and you’re less likely to be cleaning the same patch twice.
👉 Good to know: 10 Best Waterproof Masonry Paints in the UK
Best Mould Spray Questions Answered
How to prevent mould in a bedroom?
Bit of airflow makes all the difference. Crack a window now and then, don’t dry washing inside, and if it’s a cold wall, think about insulation or moving furniture away slightly.
How do you get mould off plasterboard?
Carefully. Give it a light spray with mould remover, wait a bit, then wipe. Don’t scrub too hard or soak it — the board can fall apart if it’s already damp underneath.
How to get rid of mould on walls permanently?
Clean it off properly, not just with bleach, then fix whatever’s making the wall wet — condensation, leaks, bad ventilation. If you skip that bit, it’ll come back.
Can I wipe mould with bleach?
You can, but it’s not great. Bleach might hide the stain, but often doesn’t kill what’s behind it. A proper mould spray works better and helps keep it from coming back.
How long does it take for mould killer spray to work?
Depends on the brand, but most need a few minutes — say 5 to 10. Don’t rush it. Let it sit, then wipe gently unless it says to leave it.
How long to air room after mould spray?
Open the windows for at least half an hour. If it still smells strong, leave it longer. Don’t hang around in there straight after spraying — give it time.
Does mould spray stop mould from coming back?
It might slow it down, especially if it’s the anti-fungal kind. But no spray’s magic — if the wall’s still damp, the mould will return eventually.
How long do you leave mould spray on?
Check the bottle, but usually 5–15 minutes. Some sprays you leave, others you wipe. Longer’s better, as long as it’s safe for the surface.
What to do after spraying mould spray?
Wipe it off, dry the wall, and air the place out. That’s it really. Don’t paint straight over it unless it’s fully dried and you’ve dealt with the damp.
