Stain Block
prices mostly outside the sweet spot ($4.40–$15.55) — Stain Block doesn't clear our bar today.
Flapen Score
Is Stain Block profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, Stain Block is a £44K/yr Amazon United Kingdom market (43K searches/yr). The top 5 brands hold 87% of demand. Verdict: Skip it — 40/100.
Stain Block: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -29.4% over the last 90 days and 11.7% of searches end in a purchase.
£44K
revenue / yr
Who owns the niche?
The top 5 brands hold 87% of demand, so 13% of the market is open.
13%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.2★ — the gap to enter on.
0/100
page quality · 13 products
Top Stain Block products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
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 dateBartoline 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: brands, sellers & click share
The top 5 products capture 79% of clicks — a locked-up 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%)
Stain Block demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.5×
Top Stain Block search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- stain block23K/yr
- stain blocker spray16K/yr
- stain block spray4K/yr
What reviews say buyers love and hate about Stain Block
What buyers mention most, as a share of all reviews.
What buyers love
78% of reviews“Just what I needed”
“Excellent coverage”
“Covered the water stain completely”
“Easy to use”
“Does the job”
What buyers complain about
65% of reviews“Stain cover Paint”
“It smells terrible”
“One of these cans will not spray at all”
“Water leak through ceiling”
“Poor quality”
Stain Block return rate & reasons
Why buyers send it back, as a share of all return requests.
0.8%
Return rate
14%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Stain Block questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
