Waterproof Sealant Spray
FailDemand is soft, at -68.3% this quarter, so Waterproof Sealant Spray is a Fail.
- Flapen Score
- 43 / 100Ranks 1,615 of 2,225 DIY & Tools niches · −6 vs the category median of 4943
- Market size
- £82K/yr106K searches / yr
- 90-day growth
- -68.3%search demand this quarter
- Competition
- 69%top-5 click share · 13 brands · 134 sellers
Flapen Score
Waterproof Sealant Spray against its category
The dotted line is the DIY & Tools average. Past it, Waterproof Sealant Spray is stronger. Inside it, weaker.
Market
The Waterproof Sealant Spray market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Waterproof Sealant Spray 106K times last year and spent an estimated £82K. The top 5 brands take 76% of clicks. Flapen scores it 43 out of 100, a Fail.
01 · Demand
An estimated 8.4% of those searches ended in a purchase.
Shoppers searched for this 106K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 8.4% of those searches ended in a purchase. Searches in the last 90 days moved -68.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated £82K a year.
- Searches, last 12 months
- 106K
- Growth, 90 days vs prior 90
- -68.3%
- Conversion, latest week
- 8.4%
- Market size, estimated
- £82Ka year
- Top search term
- waterproof sealant spray19K searches a year
02 · Price
A sale here is worth £9.14.
Listings sell for £9.14 on average, from £4.14 to £16.36. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 250 to 500 of them. At £9.14 that is £2K to £5K a year per listing.
- Average price
- £9.14under the $15 to $100 sweet spot
- Price range
- £4.14–£16.36
- 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–£5K
- Returns
- 0.8%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
84% of listings pay for placement with sponsored ads. 89% ship with Prime. On an average day, 4.8% of listings are out of stock. The average listing ranks #330 within Adhesives & Sealers. It carries 1,928 reviews at 4.06 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 84%
- Prime listings
- 89%
- Out of stock, average day
- 4.8%
- Average rank
- #330in Adhesives & Sealers
- Average rating
- 4.06 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 1,928per listing
- Listings tracked
- 19
04 · Newcomers
0 of last year's 2 launches cleared the first-year sales bar.
2 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 47 months on average, so the names here are settling in.
- Launched, last 12 months
- 2
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 47 months
Products
Top Waterproof Sealant Spray 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
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

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

Pro-Kleen Instant Waterproof Sealant Spray - Tough Leak Sealant Spray for Roofs Pipes Guttering & More - Transparent & Long-Lasting Formula - Instant Emergency Repair (400ml)
- Price
- £9.50
- Rating
- 4.2/5
- Reviews
- 972
- Age
- 4y ago

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

JENOLITE Stop Leak Sealer Spray | CLEAR | 400ml | Leak Sealer for Gutters and Flat Roofs | Waterproof Gutter Sealant | Fills Seals & Stops Leaks | Long Lasting Waterproof Sealant
- Price
- £10.57
- Rating
- 4.0/5
- Reviews
- 7,744
- Age
- 3y ago
Trending
estimated 90-day click momentum
Grangers Footwear Repel Plus | 275ml | Powerful Spray-On Proofer For All Walking Boots & Outdoor Footwear
- Price
- £8.17
- Rating
- 4.4/5
- Reviews
- 2,656
- Age
- 11y ago

151 Stop That Leak Repair Spray
- Price
- £4.67
- Rating
- 3.9/5
- Reviews
- 2,012
- Age
- 8y ago

Gorilla Waterproof Coat & Seal Clear 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics*
- Price
- £12.34
- Rating
- 4.5/5
- Reviews
- 2,353
- Age
- 1y ago

1ABOVE 400ml Waterproof Leak Sealant Spray for Roofs & Pipes
- Price
- £5.81
- Rating
- 4.3/5
- Reviews
- 126
- Age
- 4y 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
Newest
by launch date
Leak Repair Waterproof Sealant Cream Fast Drying Sealant Spray Leak Repair Cream Roof Sealan/t Long-Lasting Seal Spray Waterproof Crea/m for Roofs Pipes Crack Canned Filler Crea/m for Wall with Brush
- Price
- £8.26
- Rating
- 2.6/5
- Reviews
- 28
- Age
- 9mo 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

Gorilla Waterproof Coat & Seal Clear 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics*
- Price
- £12.34
- Rating
- 4.5/5
- Reviews
- 2,353
- Age
- 1y 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

300g Invisible Waterproof Agent Transparent Insulation Sealant Clear Waterproof Coating Agent Anti-leakage Repair Spray Glue Grout Sealer for Outdoor Home Bathroom Toilet Gutter
- Price
- £7.95
- Rating
- 4.0/5
- Reviews
- 601
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 69% of clicks. Leaders hold, but buyers still shop past them.
Brands
13 falling
Sellers
134
Est. top-5 brand share
76%
Top 20: 100%
Est. top-5 click share
69%
Top 20: 100%
Open market
19%
- GORILLA19%
- Polar Specialist Coatings19%
- Pro-Kleen15%
- 1ABOVE12%
- JENOLITE11%
- 1516%
Demand
Waterproof Sealant Spray search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb · busiest ÷ quietest = 4.8× · 8 of 12 months tracked
Search terms
Top Waterproof Sealant Spray search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- waterproof sealant spray19K/yr
- flex seal spray8K/yr
- sealant spray6K/yr
- spray sealant for water leaks7K/yr
- stop leak spray6K/yr
- spray sealant5K/yr
- leak sealer spray5K/yr
- leak repair waterproof sealant spray23K/yr
- water sealant spray3K/yr
- roof sealant spray5K/yr
Reviews and returns
What reviews say buyers love and hate about Waterproof Sealant Spray
We read the reviews and the return reasons for every product selling here.
“Leaking pipe”
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.
16 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 Waterproof Sealant Spray 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








