---
title: "Expanding Foam — £1.0M/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/expanding-foam"
last_updated: "2026-07-31T05:31:13.439Z"
locale: en
meta:
description: "Niche score 60/100 · £1.0M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 60/100 · £1.0M/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Expanding Foam — £1.0M/yr Amazon UK Niche (2026) - Flapen"
---
# **expanding foam**
**Worth a look**
Shows low returns (0.2%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 78Growth 19Conversion 96Competition 38Returns 99Price range 70Avg price 38Brand share 51Review moat 62Quality gap 63
**Returns**
**Incredible****0.2%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****13.2%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Great****£1.0M**
£1.0M/yr · 718K searches
**Price range**
**Good****£3.95–£40.21**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****1,039.44**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****75%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Avg price**
**Okay****£10.60**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-11.0%**
90-day search growth — must beat 0% to launch
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%")
According to Flapen's Amazon United Kingdom niche tracking, expanding foam is a £1.0M/yr Amazon United Kingdom market (718K searches/yr). The top 5 brands hold 75% of demand. Verdict: Worth a look — 60/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **expanding foam market data**
- **Units sold / yr**
- **80K–100K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **£848K–£1.1M**
- units × avg price
- **Conversion rate**
- **13.2%**
- **Avg BSR**
- **#23**
- **Page quality**
- **0%**
- **Prime**
- **83%**
- **Sponsored**
- **44%**
- **Out of stock**
- **4.5%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**65**
**Top-5 brand share**
**75%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 100%
**Open market**
**19%**
- Soudal19% - fischer18% - FERRIS14% - JKG Unknown13% - Gorilla Filler10% - The Big Cheese6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -11.0% search growth over the last 90 days.
20K15KSpike '24Black Friday '24Black Friday '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/expanding-foam/trend)
## **Top expanding foam search terms**
- **expanding foam**418K/yr+2.7%6.6% conv. - **expanding foam filler**109K/yr-53.8%6.6% conv. - **expanding foam for gap filling**16K/yr+20.3%7.9% conv. - **foam filler**26K/yr-23.1%5.3% conv. - **spray foam**26K/yr-13.3%5.5% conv. - **low expansion expanding foam**10K/yr+19.8%2.7% conv. - **foam spray**14K/yr-0.2%3.1% conv. - **foam filler for gaps**13K/yr-2.9%5.6% conv. - **spray foam filler for gaps**12K/yr-15.4%7.9% conv. - **waterproof expanding foam**13K/yr-27.0%4.3% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/expanding-foam/search-terms)
## **Top expanding foam 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%£50K10%£100K15%£151K20%£201K101001K10K 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**fischer Triple X Hand Expanding Foam 560g Yellow**fischer**£3.95**4.3★2,260 rev](https://www.amazon.co.uk/dp/B0BHJ7T4SZ) [2**2 x Cans Of The Original Gorilla Filler Weatherproof expanding foam 500ml Each**JKG Unknown**£8.24**4.4★3,715 rev](https://www.amazon.co.uk/dp/B00KG6PAZS) [3![FERRIS | The Original Gorilla Filler [2 x 500ml] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities](https://m.media-amazon.com/images/I/51kMgPsGkAL.jpg)**FERRIS | The Original Gorilla Filler \[2 x 500ml\] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities**FERRIS**£12.88**4.4★562 rev](https://www.amazon.co.uk/dp/B0CCDRWTWZ) [4**GORILLA FILLER WEATHERPROOF EXPANDING FOAM FILLER**Gorilla Filler**£5.32**4.3★7,631 rev](https://www.amazon.co.uk/dp/B0015Q0UT4) [5**Soudal 750ml Champagne Gap Filler Expanding Foam Handheld Spray with Nozzle & Gloves (3)**Soudal**£13.12**4.4★248 rev](https://www.amazon.co.uk/dp/B07STZLCM6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[![FERRIS | The Original Gorilla Filler [1 x 500ml] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities](https://m.media-amazon.com/images/I/31dQIut84bL.jpg)**FERRIS | The Original Gorilla Filler \[1 x 500ml\] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities**FERRIS**£9.77**21 rev10mo ago](https://www.amazon.co.uk/dp/B0FQ615MWH) [**500ml The Original Spray Filler Weatherproof Expanding Foam Professional Grade Gap Filler & Sealant for Wood Metal Brick Stone Paintable Sandable Airtight Seal for Indoor & Outdoor Use**SuperGift.com**£8.29**34 rev11mo ago](https://www.amazon.co.uk/dp/B0FLK93Q2H) [**Expanding Foam - Multipurpose Polyurethane Foam Filler for Doors Pipes Frames Windows Cracks & Holes + All Weather (500ML)**professional soma fix**£10.28**163 rev1y ago](https://www.amazon.co.uk/dp/B0FC2ZZBD3) [**The Big Cheese Barrier Foam - 400ml Stop Mouse Access Through Holes & Gaps in Walls Protect Cabling and Vulnerable Cavity Areas Odor Destroyer and Pheromone Trail Remover**The Big Cheese**£5.82**104 rev1y ago](https://www.amazon.co.uk/dp/B0DG629WMQ) [![FERRIS | The Original Gorilla Filler [2 x 500ml] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities](https://m.media-amazon.com/images/I/51kMgPsGkAL.jpg)**FERRIS | The Original Gorilla Filler \[2 x 500ml\] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities**FERRIS**£12.88**562 rev3y ago](https://www.amazon.co.uk/dp/B0CCDRWTWZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Gorilla Filler Expanding Foam - 750ml**151**£6.11**4.2★**▲ 230%**](https://www.amazon.co.uk/dp/B003KO14D0) [**The Big Cheese Barrier Foam - 400ml Stop Mouse Access Through Holes & Gaps in Walls Protect Cabling and Vulnerable Cavity Areas Odor Destroyer and Pheromone Trail Remover**The Big Cheese**£5.82**3.9★**▲ 205%**](https://www.amazon.co.uk/dp/B0DG629WMQ) [**Soudal Gap Filler PU Polyurethane Expanding Foam (Gun Grade) - 6 Pack**Truly PVC Supplies**£22.80**4.6★**▲ 109%**](https://www.amazon.co.uk/dp/B08NK8Y5JG) [**Soudal Soudafoam Window & Door Genius Gun - 600ml**Soudal**£7.19**4.6★**▲ 92%**](https://www.amazon.co.uk/dp/B07D4BRQKN) [![FERRIS | The Original Gorilla Filler [1 x 500ml] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities](https://m.media-amazon.com/images/I/31dQIut84bL.jpg)**FERRIS | The Original Gorilla Filler \[1 x 500ml\] Weatherproof Expanding Foam Filler | Securely Seals & Fills Squeezes into Gaps | Suitable for Filling Sealing Gaps & Cavities**FERRIS**£9.77**4.2★**▲ 75%**](https://www.amazon.co.uk/dp/B0FQ615MWH)
**~~View all trending →~~**
## **What buyers say about expanding foam**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**20%
*“Very good does what it says”*
**Ease Of Use**19%
*“Easy to use”*
**Value For Money**16%
*“Good price”*
**Quality-Overall**15%
*“overall, the product does work really well; fills holes nicely and dries very quickly, it's just slightly irritating to use”*
**Stretchability/Expandability/Elasticity**6%
*“Perfect expanding foam”*
**Strength**3%
*“Solid item”*
**Moist/Dry**2%
*“The foam cures quickly and hardens well”*
**Efficiency**2%
*“Good for the job”*
**Paint Quality**1%
*“Good product easy to use can be painted or stained”*
**Adhesion/Stickiness**1%
*“A useful filler and fantastic adhesion”*
### **What buyers complain about **
**Ease Of Cleaning**17%
*“Very disappointed despite cleaning the deliver tube that”*
**Adhesion/Stickiness**14%
*“Not immediately noticeable as becomes sticky over a short period of time”*
**Quality-Overall**12%
*“Absolute garbage”*
**Ease Of Use**11%
*“Difficult to use”*
**Spray/Flow**8%
*“this does not have a spray nozzle”*
**Value For Money**7%
*“cheaper versions available”*
**Functionality-Overall**5%
*“Does not work”*
**Stretchability/Expandability/Elasticity**3%
*“Does NOT expand”*
**Leak-Proof**2%
*“Dodgy nozzle”*
**Compatibility-Overall**2%
*“Just to clarify this will NOT work with a separate applicator gun”*
### **Top return reasons **
**Functionality-Overall**14%
**Defective Material/Parts**13%
**Leak-Proof**11%
**Advertised Vs Actual Product**8%
**Spray/Flow**7%
**Size-Overall**5%
**Ease Of Use**4%
**Adhesion/Stickiness**4%
**Maintenance And Repair**4%
**Value For Money**4%
## **Common questions**
- **Is expanding foam profitable to sell on Amazon United Kingdom?**
- The niche generates £1.0M/yr across 18 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -11.0%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the expanding foam niche?**
- 12 brands and 65 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 75% of demand.
- **What do buyers complain about in expanding foam?**
- Top complaints mined from reviews: Ease Of Cleaning, Adhesion/Stickiness, Quality-Overall. The return rate is 0.2%.
- **When does demand for expanding foam peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the expanding foam niche?**
- Listings span £3.95–£40.21; the average listing price is £10.60 (sweet spot $15–$100). The average incumbent carries 1,039 reviews — the moat a new listing must climb.
## **Related niches in DIY & Tools**
- 68 [**cardboard cutter**](https://flapen.com/research/uk/diy-tools/cardboard-cutter)£343K/yr+30.6%**Worth a look**- 68 [**door canopy**](https://flapen.com/research/uk/diy-tools/door-canopy)£202K/yr+187.7%**Worth a look**- 68 [**fence post repair**](https://flapen.com/research/uk/diy-tools/fence-post-repair)£359K/yr-8.2%**Worth a look**- 68 [**cat window guard**](https://flapen.com/research/uk/diy-tools/cat-window-guard)£98K/yr+413.1%**Worth a look**- 68 [**sun shade**](https://flapen.com/research/uk/diy-tools/sun-shade)£202K/yr+187.7%**Worth a look**- 69 [**brass hose connector**](https://flapen.com/research/uk/diy-tools/brass-hose-connector)£66K/yr+122.8%**Worth a look**[**All DIY & Tools niches **](https://flapen.com/research/uk/diy-tools)