Radweld
a concentrated shelf (top 5 take 85% of clicks) — Radweld doesn't clear our bar today.
Flapen Score
Ranks 542 of 811 Automotive niches · −5 vs the category median of 49
Is Radweld profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, Radweld is a £141K/yr Amazon United Kingdom market (93K searches/yr). The top 5 brands hold 94% of demand. Verdict: Skip it — 44/100.
Radweld: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -5.3% over the last 90 days and 14.7% of searches end in a purchase.
£141K
revenue / yr
Who owns the niche?
The top 5 brands hold 94% of demand, so 6% of the market is open.
6%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.3★ — the gap to enter on.
0/100
page quality · 10 products
Top Radweld 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
Holts Radweld Plus Coolant Leak Repair Total Coolant Leak Repair Industry Leading Car Radiator Leak Sealant Easy To Use Seal Engine Block Cylinder Head Hoses & More Suitable For All Cars 250ml
- Price
- £6.23
- Rating
- 4.5/5
- Reviews
- 2,572
- Age
- 15y ago
K-Seal Coolant Leak 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant
- Price
- £10.23
- Rating
- 4.4/5
- Reviews
- 13,415
- Age
- 16y ago
Holts LOYRW2R Radweld Cooling System Stop Leak & Radiator Repair 250ml
- Price
- £3.40
- Rating
- 4.5/5
- Reviews
- 1,416
- Age
- 18y ago
Best Price Square Car Radiator & Hose Stop Leak Repair Additive 250ml Anti-Corrosion Coolant Sealant for Radiators Heater Cores Gaskets & Welded Joints in Cooling Systems
- Price
- £7.62
- Rating
- 4.4/5
- Reviews
- 47
- Age
- 1y ago
LIQUI MOLY Radiator Stop Leak | 150 ml | Cooler additive | SKU: 8956
- Price
- £5.41
- Rating
- 4.5/5
- Reviews
- 2,340
- Age
- 15y ago
Trending
90-day click momentum
ERRECOM Bluet Car Radiator Stop Leak 250 mL bottle
- Price
- £6.08
- Rating
- 4.2/5
- Reviews
- 500
- Age
- 2y ago
Holts Radweld Plus Coolant Leak Repair Total Coolant Leak Repair Industry Leading Car Radiator Leak Sealant Easy To Use Seal Engine Block Cylinder Head Hoses & More Suitable For All Cars 250ml
- Price
- £6.23
- Rating
- 4.5/5
- Reviews
- 2,572
- Age
- 15y ago
Holts LOYRW2R Radweld Cooling System Stop Leak & Radiator Repair 250ml
- Price
- £3.40
- Rating
- 4.5/5
- Reviews
- 1,416
- Age
- 18y ago
K-Seal Coolant Leak 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant
- Price
- £10.23
- Rating
- 4.4/5
- Reviews
- 13,415
- Age
- 16y ago
Best Price Square Car Radiator & Hose Stop Leak Repair Additive 250ml Anti-Corrosion Coolant Sealant for Radiators Heater Cores Gaskets & Welded Joints in Cooling Systems
- Price
- £7.62
- Rating
- 4.4/5
- Reviews
- 47
- Age
- 1y ago
Newest
by launch dateBest Price Square Car Radiator & Hose Stop Leak Repair Additive 250ml Anti-Corrosion Coolant Sealant for Radiators Heater Cores Gaskets & Welded Joints in Cooling Systems
- Price
- £7.62
- Rating
- 4.4/5
- Reviews
- 47
- Age
- 1y ago
ERRECOM Bluet Car Radiator Stop Leak 250 mL bottle
- Price
- £6.08
- Rating
- 4.2/5
- Reviews
- 500
- Age
- 2y ago
K-Seal Permanent Coolant Leak Repair for Cooling Systems Head Gaskets Radiators
- Price
- £14.07
- Rating
- 4.4/5
- Reviews
- 139
- Age
- 2y ago
K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks 472ml
- Price
- £26.87
- Rating
- 3.8/5
- Reviews
- 602
- Age
- 11y ago
Holts Radweld Plus Coolant Leak Repair Total Coolant Leak Repair Industry Leading Car Radiator Leak Sealant Easy To Use Seal Engine Block Cylinder Head Hoses & More Suitable For All Cars 250ml
- Price
- £6.23
- Rating
- 4.5/5
- Reviews
- 2,572
- Age
- 15y ago
Competition: brands, sellers & click share
The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.
Brands
7 flat
Sellers
66
Top-5 brand share
94%
Top 20: 100%
Top-5 click share
85%
Top 20: 100%
Open market
3%
- Holts53%
- K-Seal29%
- Best Price Square5%
- Liqui Moly4%
- ERRECOM3%
- Generic3%
- Open — no brand owns it (1 brand, 3%)
Radweld demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.8×
Top Radweld search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- k seal16K/yr
- radweld13K/yr
- coolant leak repair11K/yr
- k seal coolant leak repair13K/yr
- radweld coolant leak repair9K/yr
- car radiator leak sealant7K/yr
- rad weld stop leak5K/yr
- kseal coolant leak repair3K/yr
- rad weld3K/yr
- radiator stop leak3K/yr
What reviews say buyers love and hate about Radweld
What buyers mention most, as a share of all reviews.
What buyers love
91% of reviews“months later still no leaks”
“Excellent product”
“Just as described”
“Does the job”
“Simple to use”
What buyers complain about
84% of reviews“got a leak”
“Didn't work”
“it cost me £800”
“It blocked and damaged your coolant System”
“it's a nightmare to get rid of it off”
Radweld return rate & reasons
Why buyers send it back, as a share of all return requests.
0.6%
Return rate
3%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Radweld 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.
