---
title: "Black Silicone Sealant — £227K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/black-silicone-sealant"
last_updated: "2026-07-31T08:50:46.367Z"
locale: en
meta:
description: "Niche score 43/100 · £227K/yr market · 242K searches/yr · £6.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · £227K/yr market · 242K searches/yr · £6.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Black Silicone Sealant — £227K/yr Amazon UK Niche (2026) - Flapen"
---
# **black silicone sealant**
**Skip it**
Prices mostly outside the sweet spot ($2.53–$10.62) — this niche doesn't clear our bar today.
Market size 43Growth 21Conversion 96Competition 34Returns 97Price range 0Avg price 19Brand share 13Review moat 37Quality gap 47
**Returns**
**Incredible****0.6%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****13.8%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****£227K**
£227K/yr · 242K searches
**Review moat**
**Okay****2,833.5**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****65%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-8.6%**
90-day search growth — must beat 0% to launch
**Avg price**
**Bad****£6.79**
avg listing price — sweet spot $15–$100
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
**Price range**
**Bad****£2.53–£10.62**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, black silicone sealant is a £227K/yr Amazon United Kingdom market (242K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in May. Verdict: Skip it — 43/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **black silicone sealant market data**
- **Units sold / yr**
- **30K–40K**
- avg 2,500–3,000/product
- **Revenue / yr**
- **£204K–£272K**
- units × avg price
- **Conversion rate**
- **13.8%**
- **Avg BSR**
- **#92**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **89%**
- **Out of stock**
- **9.7%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **168 days**
## **Competition & brand share**
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**8 **▼falling
**Sellers**
**85**
**Top-5 brand share**
**95%**
Top 20: 100%
**Top-5 click share**
**65%**
Top 20: 100%
**Open market**
**3%**
- Sika50% - Bond It17% - Hemway14% - EVO-STIK10% - XFasten5% - ADVANCEDSIL2% - Open — no brand owns it (2 brands, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -8.6% search growth over the last 90 days.
9K7KSpike '24Holiday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May · busiest ÷ quietest = 2.0×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/black-silicone-sealant/trend)
## **Top black silicone sealant search terms**
- **black silicone sealant**66K/yr-11.4%14.6% conv. - **sikaflex**33K/yr+0.8%8.1% conv. - **black silicone sealant waterproof**25K/yr+15.1%16.1% conv. - **black silicone**22K/yr-18.0%12.0% conv. - **black sealant waterproof**21K/yr-18.7%14.1% conv. - **black sealant**17K/yr-4.7%9.9% conv. - **black caulk**16K/yr-21.3%4.3% conv. - **silkaflex**6K/yr+8.3%10.8% conv. - **black decorators caulk**7K/yr-25.8%3.1% conv. - **black mastic sealant waterproof external**4K/yr+47.5%15.7% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/black-silicone-sealant/search-terms)
## **Top black silicone 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%10%£23K20%£45K30%£68K40%£91K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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) [2**Bond-It GP200 Contractors Grade LMA General Purpose Acetoxy Silicone Sealant With Fungicide Black 275ml**Bond It**£4.43**4.5★378 rev](https://www.amazon.co.uk/dp/B00J8NCEIQ) [3**Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack**Hemway**£8.50**4.4★3,009 rev](https://www.amazon.co.uk/dp/B0CPLZ5L2Q) [4**Everbuild General Purpose Silicone Sealant Waterproof Suitable for Interior and Exterior Use Black 280ml**Sika**£2.53**4.5★2,800 rev](https://www.amazon.co.uk/dp/B0046LZIU6) [5**EVO-STIK Multipurpose Silicone Sealant Black - Waterproof & Mould Resistant - For Interior and Exterior Use**EVO-STIK**£5.26**4.5★1,236 rev](https://www.amazon.co.uk/dp/B0168KNV6U)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**50ML Black Silicone Sealant Windscreen Sealant High Temperature Silicone Sealant Waterproof Black Sealant for Cars Window Windshield Adhesive Silicone Sealant Black Glue for Car Door Rubber Seals**Yujinpu**£4.78**7 rev10mo ago](https://www.amazon.co.uk/dp/B0FR3JQ7HJ) [**Black Silicone Sealant & Adhesive Waterproof Flexible High Strength Multipurpose Sealant for Bathroom Kitchen Automotive Glass Metal & Outdoor Repairs. 120 ml**ADVANCEDSIL**£7.51**1,121 rev10mo ago](https://www.amazon.co.uk/dp/B0FP4SV74B) [**Black Silicone Sealant - Flexible Silicone Tube for Wood Parquet Bathroom Sink Windows - Multi-Purpose Waterproof (Black 50ml)**professional soma fix**£7.07**861 rev1y ago](https://www.amazon.co.uk/dp/B0F3WHGG7S) [**Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack**Hemway**£8.50**3,009 rev2y ago](https://www.amazon.co.uk/dp/B0CPLZ5L2Q) [**Hemway Jet Black Kitchen & Bathroom Sealant & Adhesive 300ml 1 Pack**Hemway**£9.62**3,009 rev2y ago](https://www.amazon.co.uk/dp/B0CPM133Q5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**50ML Black Silicone Sealant Windscreen Sealant High Temperature Silicone Sealant Waterproof Black Sealant for Cars Window Windshield Adhesive Silicone Sealant Black Glue for Car Door Rubber Seals**Yujinpu**£4.78**4.2★**▲ 228%**](https://www.amazon.co.uk/dp/B0FR3JQ7HJ) [**Hemway Jet Black Construction Sealant & Adhesive 300ml - 1 Pack**Hemway**£8.50**4.4★**▲ 110%**](https://www.amazon.co.uk/dp/B0CPLZ5L2Q) [**Sika Stixall Extreme Power Sealant and Adhesive Waterproof White 290ml**Sika**£3.98**4.6★**▲ 108%**](https://www.amazon.co.uk/dp/B0012RWI78) [**Sika Sikaflex EBT+ Adhesive Sealant and Filler Black 300 ml**Sika**£6.74**4.6★**▲ 55%**](https://www.amazon.co.uk/dp/B0026MT3NU) [**Bond-It GP200 Contractors Grade LMA General Purpose Acetoxy Silicone Sealant With Fungicide Black 275ml**Bond It**£4.43**4.5★**▲ 41%**](https://www.amazon.co.uk/dp/B00J8NCEIQ)
**~~View all trending →~~**
## **What buyers say about black silicone sealant**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**19%
*“Excellent Product”*
**Adhesion/Stickiness**16%
*“Strong adhesive”*
**Ease Of Use**12%
*“Easy to Use”*
**Value For Money**10%
*“Great deal”*
**Advertised Vs Actual Product**9%
*“As advertised”*
**Efficiency**7%
*“does the job”*
**Water Resistance**3%
*“Definitely water-resistant and durable”*
**Color**3%
*“Nice Color”*
**Durability**3%
*“Great durability”*
**Strength**2%
*“Very good and strong”*
### **What buyers complain about **
**Adhesion/Stickiness**16%
*“Doesnt stick”*
**Quality-Overall**9%
*“Bad quality control at Sikaflex”*
**Value For Money**8%
*“little bit pricey”*
**Ease Of Use**7%
*“it was not easy to use at all”*
**Durability**6%
*“I expect it to last like other types of this product”*
**Functionality-Overall**5%
*“Does not set”*
**Thickness**3%
*“It is a bit thicker than the usual silicone”*
**Hard Feel**3%
*“have had hard ones in the past”*
**Spray/Flow**2%
*“No nozzle sent with the tube”*
**Advertised Vs Actual Product**2%
*“doesnt do what says on the tin”*
### **Top return reasons **
**Color**64%
**Adhesion/Stickiness**6%
**Defective Material/Parts**4%
**Advertised Vs Actual Product**4%
**Quality-Overall**4%
**Functionality-Overall**3%
**Leak-Proof**3%
**Value For Money**2%
**Compatibility-Overall**2%
**Maintenance And Repair**1%
## **Common questions**
- **Is black silicone sealant profitable to sell on Amazon United Kingdom?**
- The niche generates £227K/yr across 18 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -8.6%. Flapen's verdict: Skip it (43/100).
- **How competitive is the black silicone sealant niche?**
- 8 brands and 85 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in black silicone sealant?**
- Top complaints mined from reviews: Adhesion/Stickiness, Quality-Overall, Value For Money. The return rate is 0.6%.
- **When does demand for black silicone sealant peak?**
- Demand peaks in May; the busiest month runs 2.0× the quietest.
- **What does it cost to enter the black silicone sealant niche?**
- Listings span £2.53–£10.62; the average listing price is £6.79 (sweet spot $15–$100). The average incumbent carries 2,834 reviews — the moat a new listing must climb.
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