Stain Block
FailPrices span $4.40–$15.55, mostly outside the sweet spot, so Stain Block is a Fail.
- Flapen Score
- 40 / 100Ranks 1,848 of 2,225 DIY & Tools niches · −9 vs the category median of 4940
- Market size
- £44K/yr43K searches / yr
- 90-day growth
- -29.4%search demand this quarter
- Competition
- 79%top-5 click share · 10 brands · 73 sellers
Flapen Score
Stain Block against its category
The dotted line is the DIY & Tools average. Past it, Stain Block is stronger. Inside it, weaker.
Market
The Stain Block market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Stain Block 43K times last year and spent an estimated £44K. The top 5 brands take 87% of clicks. Flapen scores it 40 out of 100, a Fail.
01 · Demand
An estimated 11.7% of those searches ended in a purchase.
Shoppers searched for this 43K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 11.7% of those searches ended in a purchase. Searches in the last 90 days moved -29.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated £44K a year.
- Searches, last 12 months
- 43K
- Growth, 90 days vs prior 90
- -29.4%
- Conversion, latest week
- 11.7%
- Market size, estimated
- £44Ka year
- Peak month
- February1.5× the quietest month
- Top search term
- stain block23K searches a year
02 · Price
A sale here is worth £8.83.
Listings sell for £8.83 on average, from £4.40 to £15.55. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 250 to 500 of them. At £8.83 that is £2K to £4K a year per listing.
- Average price
- £8.83under the $15 to $100 sweet spot
- Price range
- £4.40–£15.55
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 6K–8K
- Units per listing a year
- 250–500
- Revenue per listing a year
- £2K–£4K
- Returns
- 0.8%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
69% of listings pay for placement with sponsored ads. 85% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #122 within Adhesives & Sealers. It carries 1,232 reviews at 4.20 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 69%
- Prime listings
- 85%
- Out of stock, average day
- 0.0%
- Average rank
- #122in Adhesives & Sealers
- Average rating
- 4.20 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 1,232per listing
- Listings tracked
- 13
04 · Newcomers
1 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 82 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 82 months
Products
Top Stain Block products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 22, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Everbuild Stain Block Highly Pigmented Easy to Use White 400ml
- Price
- £6.51
- Rating
- 4.4/5
- Reviews
- 4,385
- Age
- 13y ago

Pro-Kleen Damp & Stain Block Spray Paint Primer White Matt 400ml - Covers Damp Mould Grease Nicotine & Rust Stains - for Walls & Ceilings - Leaves a Waterproof Barrier
- Price
- £6.71
- Rating
- 4.3/5
- Reviews
- 439
- Age
- 3y ago

Polar Damp & Stain Block Spray - 500ml Matt White - Covers Damp Mould Grease Nicotine & Rust Stains - Anti Mould & Damp Proof Paint for Internal Walls & Ceilings - Dries in 10 Min Low Odour
- Price
- £10.12
- Rating
- 4.3/5
- Reviews
- 3,347
- Age
- 5y ago

Rustins Stain Blocker & Multi-Surface Primer 250ml- Versatile All-Surface Primer for Blocking Stains and Sealing Porous Materials; Optimal for Walls Ceilings and Wood
- Price
- £6.37
- Rating
- 4.3/5
- Reviews
- 2,532
- Age
- 9y ago

Polar Stain Block Spray - 1 x 400ml | Matt White | Prevents & Removes Stains Grease Water Marks & Rust on Internal Walls & Ceilings | Primer Spray for Wood Plastic Tiles & Painted Surfaces
- Price
- £8.94
- Rating
- 4.2/5
- Reviews
- 416
- Age
- 4y ago
Trending
estimated 90-day click momentum
Zinsser ZINCSP400A 400 ml Cover Stain Primer/Finish Aerosol
- Price
- £10.54
- Rating
- 4.6/5
- Reviews
- 933
- Age
- 13y ago

Polar Stain Block Spray - 1 x 400ml | Matt White | Prevents & Removes Stains Grease Water Marks & Rust on Internal Walls & Ceilings | Primer Spray for Wood Plastic Tiles & Painted Surfaces
- Price
- £8.94
- Rating
- 4.2/5
- Reviews
- 416
- Age
- 4y ago

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)
- Price
- £8.72
- Rating
- 4.0/5
- Reviews
- 102
- Age
- 1y ago

Bartoline Stain Blocker Spray 400ml Matt Finish Blocks Mould Mildew Damp and Grease Stains Fast-Drying Primer or Topcoat for Walls Ceilings Plaster and Woodwork
- Price
- £8.03
- Rating
- 4.3/5
- Reviews
- 79
- Age
- 11mo ago

Polar Damp & Stain Block Spray - 500ml Matt White - Covers Damp Mould Grease Nicotine & Rust Stains - Anti Mould & Damp Proof Paint for Internal Walls & Ceilings - Dries in 10 Min Low Odour
- Price
- £10.12
- Rating
- 4.3/5
- Reviews
- 3,347
- Age
- 5y ago
Newest
by launch date
Bartoline Stain Blocker Spray 400ml Matt Finish Blocks Mould Mildew Damp and Grease Stains Fast-Drying Primer or Topcoat for Walls Ceilings Plaster and Woodwork
- Price
- £8.03
- Rating
- 4.3/5
- Reviews
- 79
- Age
- 11mo ago

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)
- Price
- £8.72
- Rating
- 4.0/5
- Reviews
- 102
- Age
- 1y ago

Pro-Kleen Damp & Stain Block Spray Paint Primer White Matt 400ml - Covers Damp Mould Grease Nicotine & Rust Stains - for Walls & Ceilings - Leaves a Waterproof Barrier
- Price
- £6.71
- Rating
- 4.3/5
- Reviews
- 439
- Age
- 3y ago

Pro-Kleen Stain Block Spray Paint Primer - Covers Mould Grease Nicotine & Rust Stains - for Walls & Ceilings - Leaves a Waterproof Barrier - White Matt (400ml)
- Price
- £6.64
- Rating
- 4.3/5
- Reviews
- 184
- Age
- 3y ago

Polar Stain Block Spray - 1 x 400ml | Matt White | Prevents & Removes Stains Grease Water Marks & Rust on Internal Walls & Ceilings | Primer Spray for Wood Plastic Tiles & Painted Surfaces
- Price
- £8.94
- Rating
- 4.2/5
- Reviews
- 416
- Age
- 4y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 79% of clicks. A locked shelf that new listings rarely crack.
Brands
10 rising
Sellers
73
Est. top-5 brand share
87%
Top 20: 100%
Est. top-5 click share
79%
Top 20: 100%
Open market
7%
- Everbuild27%
- Polar Specialist Coatings22%
- Pro-Kleen22%
- RUSTINS11%
- Bartoline6%
- Zinsser5%
- Open — no brand owns it (4 brands, 7%)
Demand
Stain Block search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top Stain Block search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- stain block23K/yr
- stain blocker spray16K/yr
- stain block spray4K/yr
Reviews and returns
What reviews say buyers love and hate about Stain Block
We read the reviews and the return reasons for every product selling here.
“Stain cover Paint”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Stain Block questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data








