Leak Sealer
FailPrices span $4.17–$13.39, mostly outside the sweet spot, so Leak Sealer is a Fail.
- Flapen Score
- 48 / 100Ranks 1,131 of 2,225 DIY & Tools niches · −1 vs the category median of 4948
- Market size
- £68K/yr94K searches / yr
- 90-day growth
- -13.1%search demand this quarter
- Competition
- 54%top-5 click share · 19 brands · 138 sellers
Flapen Score
Leak Sealer against its category
The dotted line is the DIY & Tools average. Past it, Leak Sealer is stronger. Inside it, weaker.
Market
The Leak Sealer market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Leak Sealer 94K times last year and spent an estimated £68K. The top 5 brands take 61% of clicks. Flapen scores it 48 out of 100, a Fail.
01 · Demand
An estimated 8.8% of those searches ended in a purchase.
Shoppers searched for this 94K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 8.8% of those searches ended in a purchase. Searches in the last 90 days moved -13.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated £68K a year.
- Searches, last 12 months
- 94K
- Growth, 90 days vs prior 90
- -13.1%
- Conversion, latest week
- 8.8%
- Market size, estimated
- £68Ka year
- Peak month
- October1.8× the quietest month
- Top search term
- leak sealer19K searches a year
02 · Price
A sale here is worth £8.24.
Listings sell for £8.24 on average, from £4.17 to £13.39. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 100 to 250 of them. At £8.24 that is £824 to £2K a year per listing.
- Average price
- £8.24under the $15 to $100 sweet spot
- Price range
- £4.17–£13.39
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 6K–8K
- Units per listing a year
- 100–250
- Revenue per listing a year
- £824–£2K
- Returns
- 0.7%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
78% of listings pay for placement with sponsored ads. 96% ship with Prime. On an average day, 3.6% of listings are out of stock. The average listing ranks #164 within Adhesives & Sealers. It carries 4,464 reviews at 4.29 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 78%
- Prime listings
- 96%
- Out of stock, average day
- 3.6%
- Average rank
- #164in Adhesives & Sealers
- Average rating
- 4.29 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 4,464per listing
- Listings tracked
- 23
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 53 months on average, so the names here are settling in.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 53 months
Products
Top Leak Sealer 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
Kudos-Trading - Fernox 61016 Leak Sealer LS-X External Or Internal Water Pipe Leakage Repair Seal Jointing Compound 50g Plumbers Pipe Fitters DIY plumbers mait
- Price
- £11.68
- Rating
- 4.3/5
- Reviews
- 382
- Age
- 3y ago

Fernox LS-X External Leak Sealer 50ml White Plastic & Metal Handheld Sealer
- Price
- £8.70
- Rating
- 4.4/5
- Reviews
- 1,128
- Age
- 12y ago

Polar Leak Fix Waterproof Sealant Spray 400ml Clear
- Price
- £10.74
- Rating
- 4.1/5
- Reviews
- 4,576
- Age
- 7y ago

1ABOVE 400ml Waterproof Leak Sealant Spray for Roofs & Pipes
- Price
- £5.81
- Rating
- 4.3/5
- Reviews
- 126
- Age
- 4y ago

Duck Tape Wrap-Fix Self-Fusing Repair Tape | Self Amalgamating | Self Bonding for Plumbing | Leaking Pipe Repair Tape | Rubber Tape | Waterproof Black 25mm x 3m
- Price
- £6.21
- Rating
- 4.1/5
- Reviews
- 2,057
- Age
- 11y ago
Trending
estimated 90-day click momentum
1ABOVE 400ml Waterproof Leak Sealant Spray for Roofs & Pipes
- Price
- £5.81
- Rating
- 4.3/5
- Reviews
- 126
- Age
- 4y 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
- £6.19
- Rating
- 4.5/5
- Reviews
- 2,578
- Age
- 15y ago

Fernox 61016 NA 50 ml LS-X External Leak Sealant Heating
- Price
- £10.37
- Rating
- 4.7/5
- Reviews
- 7
- Age
- 13y ago

Bartoline Leak Sealer Clear 400ml Premium Transparent Waterproof Spray Sealant for Instant Repairs Weatherproof Durable & Overpaintable
- Price
- £9.23
- Rating
- 4.2/5
- Reviews
- 50
- Age
- 10mo ago

151 Stop That Leak Repair Spray
- Price
- £4.67
- Rating
- 3.9/5
- Reviews
- 2,012
- Age
- 8y ago
Newest
by launch date
Bartoline Leak Sealer Clear 400ml Premium Transparent Waterproof Spray Sealant for Instant Repairs Weatherproof Durable & Overpaintable
- Price
- £9.23
- Rating
- 4.2/5
- Reviews
- 50
- Age
- 10mo ago

Pipe Thread Sealant - Anaerobic Sealant for Metal Pipes Gaskets Fittings & Threaded Joints - Medium Viscosity High Pressure Resistant Oil-Proof & Removable (50ml)
- Price
- £10.20
- Rating
- 4.6/5
- Reviews
- 236
- Age
- 1y ago

Target Control Waterproof Tape for Leaks | 5M X 55MM | Pipe Leak Repair Tape Butyl Waterproof Sealing Tape for Roof Gutter & Outdoor Use
- Price
- £7.39
- Rating
- 4.3/5
- Reviews
- 671
- Age
- 1y ago

300g Invisible Waterproof Sealant Anti-Leaking Clear Insulation Sealant Super Strong Anti-Leakage Agent For Roof Bathroom Patio Sealer Outdoor Indoor
- Price
- £8.86
- Rating
- 4.2/5
- Reviews
- 796
- Age
- 2y ago

Gorilla Waterproof Black Coat & Seal Spray 450ml Flexible Weatherproof Liquid Sealant | Seals out Water Air & Moisture | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics*
- Price
- £13.39
- Rating
- 4.4/5
- Reviews
- 519
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 54% of clicks. Leaders hold, but buyers still shop past them.
Brands
19 falling
Sellers
138
Est. top-5 brand share
61%
Top 20: 100%
Est. top-5 click share
54%
Top 20: 97%
Open market
33%
- Kudos-Trading18%
- Fernox18%
- Polar Specialist Coatings9%
- 1ABOVE8%
- Duck7%
- Tiger Tape6%
Demand
Leak Sealer search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.8×
Search terms
Top Leak Sealer search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- leak sealer19K/yr
- water leak sealant10K/yr
- pipe sealant for leaking water pipes9K/yr
- plumbing sealant7K/yr
- fernox ls-x leak sealer7K/yr
- stop leak5K/yr
- pipe sealant6K/yr
- leak sealant5K/yr
- radiator leak sealer6K/yr
- lsx3K/yr
Reviews and returns
What reviews say buyers love and hate about Leak Sealer
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 Leak Sealer 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








