gutter sealant
Worth a lookShows low returns (0.8%), but prices mostly outside the sweet spot ($2.71–$15.61) keeps it on the watch list.
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Conversion
Great8.6%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Competition
Good46%top-5 click share — leaders hold, buyers still browse
Brand share
Good71%top-5 brand share — brands hold most of the demand
Growth
Okay+10.6%90-day search growth — must beat 0% to launch
Review moat
Okay3,345.41avg incumbent reviews — the moat a new listing must climb
Avg price
Bad£8.11avg listing price — sweet spot $15–$100
Market size
Bad£47K£47K/yr · 67K searches
Price range
Bad£2.71–£15.61cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, gutter sealant is a £47K/yr Amazon United Kingdom market (67K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Jun–Sep. Verdict: Worth a look — 51/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
gutter sealant market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- £49K–£65K
- units × avg price
- Conversion rate
- 8.6%
- Avg BSR
- #186
- Page quality
- 0%
- Prime
- 89%
- Sponsored
- 63%
- Out of stock
- 0.0%
- Avg brand age
- 53 months
- Avg seller age
- 169 days
Competition & brand share
The top 5 products take 46% of clicks — established leaders, but buyers still shop beyond them.Brands
15 rising
Sellers
156
Top-5 brand share
71%
Top 20: 100%
Top-5 click share
46%
Top 20: 91%
Open market
24%
- FloPlast22%
- Everbuild18%
- GORILLA13%
- EVO-STIK12%
- Sika7%
- Polar Specialist Coatings6%
Demand & seasonality
Weekly Amazon search volume, last 91 weeks — +10.6% search growth over the last 90 days.Peak months: Jun, Sep · busiest ÷ quietest = 3.1×
Top gutter sealant search terms
- gutter sealant36K/yr
- gutter rubber seal7K/yr
- gutter seal7K/yr
- gutter sealant black5K/yr
- gutter seals3K/yr
- roof and gutter sealant3K/yr
- gutter repair3K/yr
- guttering sealant3K/yr
Top gutter sealant products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Everbuild Everflex Roof and Gutter Sealant Butyl-Based Sealant and Adhesive for Roofing Excellent Weathering Properties Black 295 ml
Everbuild£2.714.3★3,749 rev
EVO-STIK Roof and Gutter Sealant Repairs Leaks Excellent Weather Resistance Lasts up to 10 Years Colour: Black Size: 290ml
EVO-STIK£5.324.2★54 rev
Sika Stixall Extreme Power Sealant and Adhesive Waterproof Black 290ml
Sika£4.424.6★7,030 rev
FLOPLAST 114mm square gutter seal - Bag of 10
FloPlast£7.464.5★486 rev
Polar Leak Fix Waterproof Sealant Spray 400ml Clear
Polar Specialist Coatings£10.744.1★4,576 rev
Newest
by launch date
Stormdry One Coat Liquid Rubber Leak Seal (500ml Black) | Quick-Dry Waterproof Leak Sealer for Emergency Roof and Gutter Repair on Brick Concrete Metal Roof Felt | Self-Levelling
Stormdry£15.61139 rev
Roof Sealant - Waterproof Bitumen Sealant for Roofing Felt Gutter Caravans and Asphalt Roof Felt Adhesive - Stops Leaks & Weatherproof (310ML)
professional soma fix£10.10256 rev
Gorilla Waterproof Coat & Seal Clear 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics*
GORILLA£12.342,353 rev
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*
GORILLA£13.39519 rev
Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack
Hemway£8.503,009 rev
Trending
90-day click momentumGorilla Waterproof Coat & Seal Clear 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics*
GORILLA£12.344.5★
1ABOVE 400ml Waterproof Leak Sealant Spray for Roofs & Pipes
1ABOVE£5.814.3★
Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack
Hemway£8.504.4★
EVO-STIK Roof and Gutter Sealant Repairs Leaks Excellent Weather Resistance Lasts up to 10 Years Colour: Black Size: 290ml
EVO-STIK£5.324.2★
EVO-STIK Sticks Like Sh*t Waterproof Sealant Clear - 290ml - All-Purpose - Mould resistant
EVO-STIK£6.474.5★
What buyers say about gutter sealant
What buyers praise and complain about, mined from review topics.What buyers love
“Quality Sealant”
“As advertised”
“no more leaks”
“great sticky stuff”
“Easy to use”
“Works perfectly”
“worth it”
“Water proof”
“Very strong”
“Durable, easy to use”
What buyers complain about
“Leak”
“It struggles to stick to itself”
“Doesnt do what it says it should do”
“I wondered why the product was priced suspiciously cheap”
“very hard to squeeze out”
“Really thick and sticky and my paintbrush rubberised within 5minutes so had to throw away”
“Only works for a short while”
“Cheap stuff”
“Water still dribbling out”
“Was more grey colour than black”
Top return reasons
Common questions
- Is gutter sealant profitable to sell on Amazon United Kingdom?
- The niche generates £47K/yr across 27 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +10.6%. Flapen's verdict: Worth a look (51/100).
- How competitive is the gutter sealant niche?
- 15 brands and 156 sellers compete. The top 5 products take 46% of clicks and top 5 brands hold 71% of demand.
- What do buyers complain about in gutter sealant?
- Top complaints mined from reviews: Leak-Proof, Adhesion/Stickiness, Functionality-Overall. The return rate is 0.8%.
- When does demand for gutter sealant peak?
- Demand peaks in Jun–Sep; the busiest month runs 3.1× the quietest.
- What does it cost to enter the gutter sealant niche?
- Listings span £2.71–£15.61; the average listing price is £8.11 (sweet spot $15–$100). The average incumbent carries 3,345 reviews — the moat a new listing must climb.