---
title: "Mildew Cleaner Foam — £1.1M/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/grocery/mildew-cleaner-foam"
last_updated: "2026-07-31T21:48:35.814Z"
locale: en
meta:
description: "Niche score 36/100 · £1.1M/yr market · 1.6M searches/yr · £4.10 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 36/100 · £1.1M/yr market · 1.6M searches/yr · £4.10 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Mildew Cleaner Foam — £1.1M/yr Amazon UK Niche (2026) - Flapen"
---
# **mildew cleaner foam**
**Skip it**
Soft demand (-51.6% this quarter) — this niche doesn't clear our bar today.
Market size 80Growth 0Conversion 98Competition 0Returns 99Price range 0Avg price 11Brand share 0Review moat 18Quality gap 32
**Returns**
**Incredible****0.2%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****17.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Great****£1.1M**
£1.1M/yr · 1.6M searches
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****15,990.6**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Bad****£4.10**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-51.6%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Price range**
**Bad****£2.81–£5.28**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, mildew cleaner foam is a £1.1M/yr Amazon United Kingdom market (1.6M searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Nov. Verdict: Skip it — 36/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **mildew cleaner foam market data**
- **Units sold / yr**
- **250K–300K**
- avg 30,000–40,000/product
- **Revenue / yr**
- **£1.0M–£1.2M**
- units × avg price
- **Conversion rate**
- **17.6%**
- **Avg BSR**
- **#6**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **168 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **▲rising
**Sellers**
**110**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- HG69% - Cillit Bang23% - UNDO5% - Astonish3%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -51.6% search growth over the last 90 days.
50K30KSpike '24Black Friday '24Spike '25Prime Day '25Black Friday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Nov · busiest ÷ quietest = 2.8×
[**Open Trend **](https://flapen.com/research/uk/grocery/mildew-cleaner-foam/trend)
## **Top mildew cleaner foam search terms**
- **mould remover**444K/yr-57.7%11.2% conv. - **hg mould spray**269K/yr-41.7%15.3% conv. - **mould spray**211K/yr-48.0%14.7% conv. - **mold remover spray**127K/yr-61.5%13.0% conv. - **black mould remover**70K/yr-51.2%16.1% conv. - **mould and mildew remover**61K/yr-46.3%5.5% conv. - **mould**50K/yr-40.1%3.7% conv. - **hg mould remover spray**54K/yr-66.3%15.8% conv. - **mould remover spray**35K/yr-46.5%10.3% conv. - **anti mould spray**39K/yr-59.2%10.3% conv. [**All search terms **](https://flapen.com/research/uk/grocery/mildew-cleaner-foam/search-terms)
## **Top mildew cleaner foam products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%£171K30%£341K45%£512K60%£683K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 5 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**HG Mould Remover Spray | Kills Black Mold & Mildew on Walls & Tiles | 500ml**HG**£4.19**4.6★44,310 rev](https://www.amazon.co.uk/dp/B000IU40HQ) [2**Cillit Bang Black Mould Remover 750ml Effortless Shine for Damp Areas**Cillit Bang**£2.81**4.6★1,958 rev](https://www.amazon.co.uk/dp/B00XVJG1HI) [3**HG Mould Remover Foam Spray Black Mould & Mildew Cleaner Removes Stains 500ml**HG**£4.72**4.5★29,905 rev](https://www.amazon.co.uk/dp/B01CRBEUVO) [4**Undo Mould Remover Spray (500 ml) | Fast-Acting Active Powerful Cleaner for Black Mould Mildew & Stains on Tiles Walls Ceilings Bathroom Kitchen**UNDO**£5.28**4.6★258 rev](https://www.amazon.co.uk/dp/B0FZLXH6SY) [5**Astonish Specialist Extra Strength Mould & Mildew Stain Blaster Spray 750ml Fast Acting Mould Remover & Bathroom Cleaner for Tiles Grout & Shower Areas**Astonish**£3.51**4.5★3,522 rev](https://www.amazon.co.uk/dp/B07S9YJSJT)
### **Newest**
by launch date
[**Undo Mould Remover Spray (500 ml) | Fast-Acting Active Powerful Cleaner for Black Mould Mildew & Stains on Tiles Walls Ceilings Bathroom Kitchen**UNDO**£5.28**258 rev8mo ago](https://www.amazon.co.uk/dp/B0FZLXH6SY) [**Astonish Specialist Extra Strength Mould & Mildew Stain Blaster Spray 750ml Fast Acting Mould Remover & Bathroom Cleaner for Tiles Grout & Shower Areas**Astonish**£3.51**3,522 rev7y ago](https://www.amazon.co.uk/dp/B07S9YJSJT) [**HG Mould Remover Foam Spray Black Mould & Mildew Cleaner Removes Stains 500ml**HG**£4.72**29,905 rev10y ago](https://www.amazon.co.uk/dp/B01CRBEUVO) [**Cillit Bang Black Mould Remover 750ml Effortless Shine for Damp Areas**Cillit Bang**£2.81**1,958 rev10y ago](https://www.amazon.co.uk/dp/B00XVJG1HI) [**HG Mould Remover Spray | Kills Black Mold & Mildew on Walls & Tiles | 500ml**HG**£4.19**44,310 rev19y ago](https://www.amazon.co.uk/dp/B000IU40HQ)
### **Trending**
90-day click momentum
[**Cillit Bang Black Mould Remover 750ml Effortless Shine for Damp Areas**Cillit Bang**£2.81**4.6★**▲ 23%**](https://www.amazon.co.uk/dp/B00XVJG1HI) [**Undo Mould Remover Spray (500 ml) | Fast-Acting Active Powerful Cleaner for Black Mould Mildew & Stains on Tiles Walls Ceilings Bathroom Kitchen**UNDO**£5.28**4.6★**— 1%**](https://www.amazon.co.uk/dp/B0FZLXH6SY) [**HG Mould Remover Spray | Kills Black Mold & Mildew on Walls & Tiles | 500ml**HG**£4.19**4.6★**— 3%**](https://www.amazon.co.uk/dp/B000IU40HQ) [**HG Mould Remover Foam Spray Black Mould & Mildew Cleaner Removes Stains 500ml**HG**£4.72**4.5★**— 5%**](https://www.amazon.co.uk/dp/B01CRBEUVO) [**Astonish Specialist Extra Strength Mould & Mildew Stain Blaster Spray 750ml Fast Acting Mould Remover & Bathroom Cleaner for Tiles Grout & Shower Areas**Astonish**£3.51**4.5★**▼ 36%**](https://www.amazon.co.uk/dp/B07S9YJSJT)
## **What buyers say about mildew cleaner foam**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**17%
*“very good and more effective than many other brands”*
**Efficiency**14%
*“Does the job”*
**Ease Of Cleaning**13%
*“Easy to use and rinse off,”*
**Value For Money**9%
*“Good value for money”*
**Advertised Vs Actual Product**9%
*“Works as it says”*
**Spray/Flow**8%
*“Overall, this spray is practical, efficient, and reliable”*
**Ease Of Use**6%
*“ease of removal”*
**Smell**5%
*“Good and smelly”*
**Strength**3%
*“It's powerful”*
**Ease Of Application**1%
*“This product is effective when applied”*
### **What buyers complain about **
**Smell**22%
*“Smell is awful”*
**Functionality-Overall**12%
*“Does not do as it says”*
**Value For Money**7%
*“Not great as quite expensive”*
**Ease Of Cleaning**6%
*“normally I would have had to clean it again by now”*
**Stain Resistance**4%
*“A few heavily stained areas needed to be treated 2 or 3 times”*
**Color**3%
*“it was completely white as if nothing had happened”*
**Quality-Overall**2%
*“Rubbish”*
**Leak-Proof**2%
*“some of the six bottles did leak”*
**Ease Of Use**2%
*“Couldnt use it at all”*
**Durability**1%
*“Mould is gone within a few minutes”*
### **Top return reasons **
**Leak-Proof**34%
**Functionality-Overall**20%
**Compatibility-Overall**7%
**Advertised Vs Actual Product**7%
**Smell**4%
**Value For Money**4%
**Strength**3%
**Stain Resistance**3%
**Quality-Overall**2%
**Moist/Dry**2%
## **Common questions**
- **Is mildew cleaner foam profitable to sell on Amazon United Kingdom?**
- The niche generates £1.1M/yr across 5 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -51.6%. Flapen's verdict: Skip it (36/100).
- **How competitive is the mildew cleaner foam niche?**
- 4 brands and 110 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in mildew cleaner foam?**
- Top complaints mined from reviews: Smell, Functionality-Overall, Value For Money. The return rate is 0.2%.
- **When does demand for mildew cleaner foam peak?**
- Demand peaks in Jan–Feb–Nov; the busiest month runs 2.8× the quietest.
- **What does it cost to enter the mildew cleaner foam niche?**
- Listings span £2.81–£5.28; the average listing price is £4.10 (sweet spot $15–$100). The average incumbent carries 15,991 reviews — the moat a new listing must climb.
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