damp seal paint
Worth a lookShows low returns (0.7%), but soft demand (-49.1% this quarter) keeps it on the watch list.
Returns
Incredible0.7%return rate — above 5% kills the launch gate
Conversion
Great8.1%search→purchase rate — share of searches ending in a sale
Price range
Great£7.07–£39.59cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good£13.98avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Review moat
Okay1,587.35avg incumbent reviews — the moat a new listing must climb
Brand share
Okay77%top-5 brand share — brands hold most of the demand
Market size
Okay£222K£222K/yr · 196K searches
Growth
Bad-49.1%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, damp seal paint is a £222K/yr Amazon United Kingdom market (196K searches/yr). The top 5 brands hold 77% of demand. Demand peaks in Jan–Feb–Nov. Verdict: Worth a look — 52/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
damp seal paint market data
- Units sold / yr
- 10K–13K
- avg 500–750/product
- Revenue / yr
- £140K–£175K
- units × avg price
- Conversion rate
- 8.1%
- Avg BSR
- #159
- Page quality
- 0%
- Prime
- 70%
- Sponsored
- 75%
- Out of stock
- 4.4%
- Avg brand age
- 68 months
- Avg seller age
- 171 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
11 flat
Sellers
67
Top-5 brand share
77%
Top 20: 100%
Top-5 click share
54%
Top 20: 100%
Open market
15%
- Polycell21%
- SIRAMICO COATINGS19%
- Polar Specialist Coatings14%
- Ronseal13%
- RUSTINS9%
- Drybase8%
- Open — no brand owns it (5 brands, 15%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -49.1% search growth over the last 90 days.Peak months: Jan, Feb, Nov · busiest ÷ quietest = 2.3×
Top damp seal paint search terms
- damp seal paint79K/yr
- damp proof paint37K/yr
- damp seal19K/yr
- damp paint17K/yr
- damp proof paint for internal walls16K/yr
- damp seal paint for internal walls8K/yr
- anti damp paint for internal walls7K/yr
- damp paint for walls for interior5K/yr
- anti damp paint4K/yr
- wall dampness solution3K/yr
Top damp seal paint 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 20 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Polycell One Coat Damp Seal 500ML
Polycell£10.474.5★3,278 rev
Ronseal OCDSW250 250 ml One Coat Damp Seal - White
Ronseal£9.414.4★3,630 rev
SIRAMICO COATINGS The Dampseal One Coat | 1 Litre I Seals Damp And Mould Stains In One Coat By Brush Or Roller (White)
SIRAMICO COATINGS£14.374.3★553 rev
Rustins Damp Seal Paint Water-Resistant Primer for Walls and Ceilings Effectively Seals Damp Stains Quick-Drying and Easy to Apply for Long-Lasting Results -250ml
RUSTINS£7.074.4★299 rev
Drybase Liquid Damp Proof Membrane (1 Litre White) - Damp Proofing Paint for Internal Walls and Floors. Waterproof Paint
Drybase£17.944.5★2,800 rev
Newest
by launch date
Mifica Legacy Anti Mould Paint White Matt (Water Based) Mould Resistant Bathroom & Kitchen Paint for Walls & Ceilings | Humidity & Condensation Protection | 1L
Mifica£14.4877 rev
SPRAYTEKK Damp & Stain Block Primer Spray | 500ml | Matt White | Anti-Mould Smoke & Stain Coverage | Interior Use on Plaster Cement Stone Wood & Brick (Matt White Pack Of 1)
SPRAYTEKK£8.72102 rev
Leyland Trade - Damp Block -White - 750ml
Leyland£15.463 rev
Dryzone Damp Proof & Damp Seal Paint White (500ml) for Walls Bathrooms Ceilings & Interior Surfaces Blocks Damp Mould & Stains - Quick Drying Matt Undercoat Paint
Dryzone£14.21312 rev
SIRAMICO COATINGS The Dampseal One Coat - Seals Damp And Mould Stains In One Coat By Brush Or Roller (WHITE 500 ml (Pack of 1))
SIRAMICO COATINGS£13.06553 rev
Trending
90-day click momentumRustins Damp Seal Paint Water-Resistant Primer for Walls and Ceilings Effectively Seals Damp Stains Quick-Drying and Easy to Apply for Long-Lasting Results -250ml
RUSTINS£7.074.4★
Polar Anti Mould Paint - 500ml Brilliant Matt White - 5 Year Mould Resistant Paint to Control Moisture - For Internal Walls & Ceilings
Polar Specialist Coatings£13.874.4★
Drybase Liquid Damp Proof Membrane (5 Litre White) - Damp Proofing Paint for Internal Walls and Floors. Waterproof Paint
Drybase£39.594.5★
Mifica Legacy Anti Mould Paint White Matt (Water Based) Mould Resistant Bathroom & Kitchen Paint for Walls & Ceilings | Humidity & Condensation Protection | 1L
Mifica£14.484.5★
Leyland Trade - Damp Block -White - 750ml
Leyland£15.464.6★
What buyers say about damp seal paint
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality Damp seal”
“Very nice paint to use and good finish”
“As advertised”
“Covers well”
“Easy to use”
“Good value for money”
“This seems to do its job”
“Doesn't smell too strong”
“It covers stains, damp, dries quickly, is easy to apply, doesn't drip, is nice and smooth”
“Excellent paint”
What buyers complain about
“Cheap quality paint”
“smells very strong”
“no where near thick enough to cover windowsills”
“Colour is light grey NOT WHITE”
“Poor cheap nozzles making the product impossible to use”
“Rather smaller than I expected”
“didnt last long”
“It doesn't come off surface”
“that may not be a good point to base my opinion of costs on”
“Its advertised as clear, but its not”
Top return reasons
Common questions
- Is damp seal paint profitable to sell on Amazon United Kingdom?
- The niche generates £222K/yr across 20 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -49.1%. Flapen's verdict: Worth a look (52/100).
- How competitive is the damp seal paint niche?
- 11 brands and 67 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 77% of demand.
- What do buyers complain about in damp seal paint?
- Top complaints mined from reviews: Paint Quality, Smell, Thickness. The return rate is 0.7%.
- When does demand for damp seal paint peak?
- Demand peaks in Jan–Feb–Nov; the busiest month runs 2.3× the quietest.
- What does it cost to enter the damp seal paint niche?
- Listings span £7.07–£39.59; the average listing price is £13.98 (sweet spot $15–$100). The average incumbent carries 1,587 reviews — the moat a new listing must climb.