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
11.7% of searches ended in a purchase last week.
Shoppers searched for this 43K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 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
Amazon counts 1 of last year's 1 launches as successful.
1 products launched here in the last 12 months. Amazon counts 1 of them as successful launches, new products that hit its first-year sales bar. 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
Every tracked product: its share of the shelf, its reviews, and its price.
Top sellers
by 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
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 79% of clicks. A locked shelf that new listings rarely crack.
Brands
10 rising
Sellers
73
Top-5 brand share
87%
Top 20: 100%
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 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
What buyers praise, what they complain about and why they send it back, from the reviews.
Complain
Stain cover Paint
I was expecting a thick paint
Also not enough paint in the spray
It smells terrible
has a strong lingering smell
Smells really strong
One of these cans will not spray at all
Poor cheap nozzles making the product impossible to use
it wouldnt spray
Water leak through ceiling
It leaked the first time used
Kept bleeding through
Poor quality
Rubbish
Absolute rubbish
Love
Just what I needed
Does what its supposed to do
Does the job
Excellent coverage
Excellent product
Good quality, quality seems thin
Covered the water stain completely
it works well to cover stains
Good stain blocker
Easy to use
easy to apply
Sprays even and easy to use
Does the job
It does a good job works well
Works well
Return
0.8% Return rate 14% Fixable by listing
One of these cans will not spray at all
Poor cheap nozzles making the product impossible to use
it wouldnt spray
Stain cover Paint
I was expecting a thick paint
Also not enough paint in the spray
Doesn't work
Not good for felt len
Not working
Water leak through ceiling
It leaked the first time used
Kept bleeding through
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.








