composite decking cleaner
Skip itSoft demand (-32.4% this quarter) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Review moat
Great289.43avg incumbent reviews — the moat a new listing must climb
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Conversion
Great8.1%search→purchase rate — share of searches ending in a sale
Price range
Good£5.38–£27.87cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good£12.67avg listing price — sweet spot $15–$100
Brand share
Bad91%top-5 brand share — brand-locked demand
Competition
Bad76%top-5 click share — a locked-up shelf
Market size
Bad£43K£43K/yr · 42K searches
Growth
Bad-32.4%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, composite decking cleaner is a £43K/yr Amazon United Kingdom market (42K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Mar–Apr–May. Verdict: Skip it — 44/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
composite decking cleaner market data
- Units sold / yr
- 4K–5K
- avg 250–500/product
- Revenue / yr
- £51K–£63K
- units × avg price
- Conversion rate
- 8.1%
- Avg BSR
- #187
- Page quality
- 0%
- Prime
- 50%
- Sponsored
- 57%
- Out of stock
- 0.0%
- Avg brand age
- 70 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 flat
Sellers
29
Top-5 brand share
91%
Top 20: 100%
Top-5 click share
76%
Top 20: 100%
Open market
7%
- RUSTINS29%
- Furniture Clinic22%
- Chemical Trade Store20%
- HLS Supplies17%
- Caravan King4%
- Pro-Kleen2%
- Open — no brand owns it (4 brands, 7%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -32.4% search growth over the last 90 days.Peak months: Mar, Apr, May · busiest ÷ quietest = 16.7×
Top composite decking cleaner 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.
All 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Rustins Composite Decking Cleaner - Effective Mold and Mildew Remover | Deep Cleaning Solution for Decks Patios and Outdoor Spaces 4 litre
RUSTINS£10.264.0★581 rev
Furniture Clinic Composite Decking Cleaner 5L Quick Acting Cleaning Formula Cleans Green Algae and Mould - Use one Plastic Sheds and Fences
Furniture Clinic£16.093.9★89 rev
Chemical Trade Store - Composite Decking Cleaner | Plastic UPVC Deck Algae and Mould Remover - Removes Dirt Grime and Bird Droppings - 2.5 Litre
Chemical Trade Store£7.824.2★94 rev
Chemical Trade Store - Composite Decking Cleaner - Plastic UPVC Deck Algae and Mould Remover - Removes Dirt Grime and Bird Droppings - 5 Litre
Chemical Trade Store£10.234.2★94 rev
HLS Supplies 10L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt Grime and Bird Droppings
HLS Supplies£27.874.3★427 rev
Newest
by launch date
5L Composite Decking Cleaner Furniture & Fencing Reviver Removes Dirt Grime & Bird Droppings
STORM TRADING GROUP£10.053 rev
Dunnet Tools 5L Composite Decking Cleaner Fast Acting Decking & Outdoor Patio Cleaner Heavy Duty Deep Clean Formula Stain & Mould Remover To Remove Dirt Mould Mildew Algae Moss & Black Spots
Dunnet Tools£8.031 rev
Chemical Trade World - Composite Decking Cleaner 5L - Rinse-Off Cleaning Solution for Composite & Plastic Decking - Removes Dirt Algae Marks & Surface Build-Up
Chemical Trade World£10.740 rev
Pro-Kleen Ultimate Composite Decking Cleaner 2 x 5L Simply Spray & Walk Away Free From Acid & Bleach Concentrated Mix 5:1 Covers 480sq Metres Prevents Algae Mould and Dirt Pet & Child Safe Once Dry
Pro-Kleen£20.7512 rev
Chemical Trade Store - Composite Decking Cleaner | Plastic UPVC Deck Algae and Mould Remover - Removes Dirt Grime and Bird Droppings - 2.5 Litre
Chemical Trade Store£7.8294 rev
Trending
90-day click momentumDunnet Tools 5L Composite Decking Cleaner Fast Acting Decking & Outdoor Patio Cleaner Heavy Duty Deep Clean Formula Stain & Mould Remover To Remove Dirt Mould Mildew Algae Moss & Black Spots
Dunnet Tools£8.035.0★
5L Composite Decking Cleaner Furniture & Fencing Reviver Removes Dirt Grime & Bird Droppings
STORM TRADING GROUP£10.053.5★
Chemical Trade World - Composite Decking Cleaner 5L - Rinse-Off Cleaning Solution for Composite & Plastic Decking - Removes Dirt Algae Marks & Surface Build-Up
Chemical Trade World£10.740.0★
Caravan King - Heavy-Duty Deck Cleaner - Algae & Mould Remover for Wood & Composite Surfaces Ideal for Decks & Patios Safe 1L Formula Fast-Acting Easy Application
Caravan King£5.384.2★
HLS Supplies 1L Composite Plastic Decking Cleaner and Reviver - Removes Dirt Grime and Bird Droppings
HLS Supplies£8.954.2★
What buyers say about composite decking cleaner
What buyers praise and complain about, mined from review topics.What buyers love
“Super Clean”
“Does what it says it does”
“Easy to use”
“Good quality”
“Just a lovely clean smell germ buster”
“came up as new”
“GREAT VALUE FOR MONEY”
“godd stuff for disinfecting pots”
“Worked really well on our decking”
“Works on mould fab”
What buyers complain about
“Does not resolve”
“Not worth the price”
“It's not as good as other reviews say”
“Followed the instructions with this product, didnt work at all”
“compared to other products I felt cleaning quality was poor”
“It has left brown stains that I am unable to remove even with a strong jet wash”
“unfortunately the 2 Nd bottle leaked all over the box therefore I did not have enough to finish the patio”
“Doesnt smell of anything”
“Didnt remove any of the marks not worth the money it is more like washing up liquid”
“the lid crushed inwards making it almost impossible to open”
Top return reasons
Common questions
- Is composite decking cleaner profitable to sell on Amazon United Kingdom?
- The niche generates £43K/yr across 14 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -32.4%. Flapen's verdict: Skip it (44/100).
- How competitive is the composite decking cleaner niche?
- 10 brands and 29 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 91% of demand.
- What do buyers complain about in composite decking cleaner?
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Quality-Overall. The return rate is 0.1%.
- When does demand for composite decking cleaner peak?
- Demand peaks in Mar–Apr–May; the busiest month runs 16.7× the quietest.
- What does it cost to enter the composite decking cleaner niche?
- Listings span £5.38–£27.87; the average listing price is £12.67 (sweet spot $15–$100). The average incumbent carries 289 reviews — the moat a new listing must climb.