---
title: "Gutter Sealant — £47K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/gutter-sealant"
last_updated: "2026-07-31T12:35:58.041Z"
locale: en
meta:
description: "Niche score 51/100 · £47K/yr market · 67K searches/yr. Prices mostly outside the sweet spot ($2.71–$15.61) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · £47K/yr market · 67K searches/yr. Prices mostly outside the sweet spot ($2.71–$15.61) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Gutter Sealant — £47K/yr Amazon UK Niche (2026) - Flapen"
---
# **gutter sealant**
**Worth a look**
Shows low returns (0.8%), but prices mostly outside the sweet spot ($2.71–$15.61) keeps it on the watch list.
Market size 12Growth 38Conversion 81Competition 66Returns 96Price range 5Avg price 23Brand share 57Review moat 32Quality gap 68
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.6%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****46%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Good****71%**
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**
**Okay****3,345.41**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Bad****£8.11**
avg listing price — sweet spot $15–$100
**Market size**
**Bad****£47K**
£47K/yr · 67K searches
**Price range**
**Bad****£2.71–£15.61**
cheapest 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 ~~](https://flapen.com/research/methodology)
## **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.
2K2KSpike '25Prime Day '25Spike '26 seasonNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Jun, Sep · busiest ÷ quietest = 3.1×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/gutter-sealant/trend)
## **Top gutter sealant search terms**
- **gutter sealant**36K/yr+8.8%8.7% conv. - **gutter rubber seal**7K/yr+40.5%4.7% conv. - **gutter seal**7K/yr-5.2%8.2% conv. - **gutter sealant black**5K/yr+18.0%14.1% conv. - **gutter seals**3K/yr+37.5%10.3% conv. - **roof and gutter sealant**3K/yr-0.3%10.1% conv. - **gutter repair**3K/yr-3.7%4.8% conv. - **guttering sealant**3K/yr-1.1%9.4% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/gutter-sealant/search-terms)
## **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.
0%5%£2K10%£5K15%£7K20%£9K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Everbuild Everflex Roof and Gutter Sealant Butyl-Based Sealant and Adhesive for Roofing Excellent Weathering Properties Black 295 ml**Everbuild**£2.71**4.3★3,749 rev](https://www.amazon.co.uk/dp/B003OVCCU8) [2**EVO-STIK Roof and Gutter Sealant Repairs Leaks Excellent Weather Resistance Lasts up to 10 Years Colour: Black Size: 290ml**EVO-STIK**£5.32**4.2★54 rev](https://www.amazon.co.uk/dp/B00J9CRK0I) [3**Sika Stixall Extreme Power Sealant and Adhesive Waterproof Black 290ml**Sika**£4.42**4.6★7,030 rev](https://www.amazon.co.uk/dp/B0012RR256) [4**FLOPLAST 114mm square gutter seal - Bag of 10**FloPlast**£7.46**4.5★486 rev](https://www.amazon.co.uk/dp/B073S9P8LM) [5**Polar Leak Fix Waterproof Sealant Spray 400ml Clear**Polar Specialist Coatings**£10.74**4.1★4,576 rev](https://www.amazon.co.uk/dp/B094W4Z9N4)
**~~View all top sellers →~~**
### **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**£15.61**139 rev11mo ago](https://www.amazon.co.uk/dp/B0FN8D2P2K) [**Roof Sealant - Waterproof Bitumen Sealant for Roofing Felt Gutter Caravans and Asphalt Roof Felt Adhesive - Stops Leaks & Weatherproof (310ML)**professional soma fix**£10.10**256 rev1y ago](https://www.amazon.co.uk/dp/B0F3WF9PGN) [**Gorilla Waterproof Coat & Seal Clear 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics***GORILLA**£12.34**2,353 rev1y ago](https://www.amazon.co.uk/dp/B0DJD35W9B) [**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**£13.39**519 rev2y ago](https://www.amazon.co.uk/dp/B0CYHJ6DR6) [**Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack**Hemway**£8.50**3,009 rev2y ago](https://www.amazon.co.uk/dp/B0CPLZ5L2Q)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Gorilla Waterproof Coat & Seal Clear 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles Brick Wood Metal Concrete Stone Rubber Plastics***GORILLA**£12.34**4.5★**▲ 200%**](https://www.amazon.co.uk/dp/B0DJD35W9B) [**1ABOVE 400ml Waterproof Leak Sealant Spray for Roofs & Pipes**1ABOVE**£5.81**4.3★**▲ 199%**](https://www.amazon.co.uk/dp/B0B322LWDX) [**Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack**Hemway**£8.50**4.4★**▲ 155%**](https://www.amazon.co.uk/dp/B0CPLZ5L2Q) [**EVO-STIK Roof and Gutter Sealant Repairs Leaks Excellent Weather Resistance Lasts up to 10 Years Colour: Black Size: 290ml**EVO-STIK**£5.32**4.2★**▲ 131%**](https://www.amazon.co.uk/dp/B00J9CRK0I) [**EVO-STIK Sticks Like Sh*t Waterproof Sealant Clear - 290ml - All-Purpose - Mould resistant**EVO-STIK**£6.47**4.5★**▲ 104%**](https://www.amazon.co.uk/dp/B01D8GQ11O)
**~~View all trending →~~**
## **What buyers say about gutter sealant**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**22%
*“Quality Sealant”*
**Advertised Vs Actual Product**14%
*“As advertised”*
**Leak-Proof**11%
*“no more leaks”*
**Adhesion/Stickiness**8%
*“great sticky stuff”*
**Ease Of Use**7%
*“Easy to use”*
**Efficiency**7%
*“Works perfectly”*
**Value For Money**6%
*“worth it”*
**Water Resistance**3%
*“Water proof”*
**Strength**2%
*“Very strong”*
**Durability**2%
*“Durable, easy to use”*
### **What buyers complain about **
**Leak-Proof**22%
*“Leak”*
**Adhesion/Stickiness**15%
*“It struggles to stick to itself”*
**Functionality-Overall**12%
*“Doesnt do what it says it should do”*
**Value For Money**5%
*“I wondered why the product was priced suspiciously cheap”*
**Ease Of Use**3%
*“very hard to squeeze out”*
**Thickness**3%
*“Really thick and sticky and my paintbrush rubberised within 5minutes so had to throw away”*
**Durability**3%
*“Only works for a short while”*
**Quality-Overall**3%
*“Cheap stuff”*
**Water Resistance**3%
*“Water still dribbling out”*
**Color**2%
*“Was more grey colour than black”*
### **Top return reasons **
**Color**20%
**Size-Overall**17%
**Leak-Proof**14%
**Adhesion/Stickiness**11%
**Functionality-Overall**9%
**Compatibility-Overall**6%
**Advertised Vs Actual Product**5%
**Quality-Overall**4%
**Defective Material/Parts**2%
**Value For Money**2%
## **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.
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