Radweld
FailThe top 5 products take 85% of clicks, so Radweld is a Fail.
- Flapen Score
- 44 / 100Ranks 542 of 811 Automotive niches · −5 vs the category median of 4944
- Market size
- £141K/yr93K searches / yr
- 90-day growth
- -5.3%search demand this quarter
- Competition
- 85%top-5 click share · 7 brands · 66 sellers
Flapen Score
Radweld against its category
The dotted line is the Automotive average. Past it, Radweld is stronger. Inside it, weaker.
Market
The Radweld market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Radweld 93K times last year and spent an estimated £141K. The top 5 brands take 94% of clicks. Flapen scores it 44 out of 100, a Fail.
01 · Demand
An estimated 14.7% of those searches ended in a purchase.
Shoppers searched for this 93K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 14.7% of those searches ended in a purchase. Searches in the last 90 days moved -5.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated £141K a year.
- Searches, last 12 months
- 93K
- Growth, 90 days vs prior 90
- -5.3%
- Conversion, latest week
- 14.7%
- Market size, estimated
- £141Ka year
- Peak month
- March1.8× the quietest month
- Top search term
- k seal16K searches a year
02 · Price
A sale here is worth £10.28.
Listings sell for £10.28 on average, from £3.40 to £26.87. Amazon reports units sold in ranges. This niche sold 15K to 20K a year. The average listing sells 1,000 to 1,250 of them. At £10.28 that is £10K to £13K a year per listing.
- Average price
- £10.28under the $15 to $100 sweet spot
- Price range
- £3.40–£26.87
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 15K–20K
- Units per listing a year
- 1,000–1,250
- Revenue per listing a year
- £10K–£13K
- Returns
- 0.6%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
40% of listings pay for placement with sponsored ads. 60% ship with Prime. On an average day, 3.0% of listings are out of stock. The average listing ranks #86 within Car & Motorbike Care. It carries 2,372 reviews at 4.33 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 40%
- Prime listings
- 60%
- Out of stock, average day
- 3.0%
- Average rank
- #86in Car & Motorbike Care
- Average rating
- 4.33 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 2,372per listing
- Listings tracked
- 10
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 63 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 63 months
Products
Top Radweld 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 17, 2026. The live listing can differ.
Top sellers
by estimated 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
estimated 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 date
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

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
Competition: brands, sellers & click share
The top 5 products take an estimated 85% of clicks. A locked shelf that new listings rarely crack.
Brands
7 flat
Sellers
66
Est. top-5 brand share
94%
Top 20: 100%
Est. 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%)
Demand
Radweld search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.8×
Search terms
Top Radweld search terms shoppers use
The exact words shoppers type, with estimated 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
Reviews and returns
What reviews say buyers love and hate about Radweld
We read the reviews and the return reasons for every product selling here.
“got a leak”
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.
17 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 Radweld 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









