---
title: "Exterior Filler — £110K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/exterior-filler"
last_updated: "2026-07-31T11:23:26.802Z"
locale: en
meta:
description: "Niche score 60/100 · £110K/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 · £110K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Exterior Filler — £110K/yr Amazon UK Niche (2026) - Flapen"
---
# **exterior filler**
**Worth a look**
Shows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 26Growth 76Conversion 95Competition 53Returns 98Price range 38Avg price 23Brand share 50Review moat 48Quality gap 70
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.3%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Great****+62.2%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****53%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****75%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****1,736.04**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****£3.27–£22.22**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Okay****£110K**
£110K/yr · 107K searches
**Avg price**
**Bad****£8.40**
avg listing price — sweet spot $15–$100
According to Flapen's Amazon United Kingdom niche tracking, exterior filler is a £110K/yr Amazon United Kingdom market (107K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Apr–May–Jul–Aug. Verdict: Worth a look — 60/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **exterior filler market data**
- **Units sold / yr**
- **10K–13K**
- avg 250–500/product
- **Revenue / yr**
- **£84K–£105K**
- units × avg price
- **Conversion rate**
- **12.3%**
- **Avg BSR**
- **#125**
- **Page quality**
- **0%**
- **Prime**
- **89%**
- **Sponsored**
- **57%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **167 days**
## **Competition & brand share**
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **▲rising
**Sellers**
**112**
**Top-5 brand share**
**75%**
Top 20: 100%
**Top-5 click share**
**53%**
Top 20: 93%
**Open market**
**20%**
- Toupret24% - Ronseal19% - Bartoline14% - Bostik12% - Sika5% - Sandtex5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +62.2% search growth over the last 90 days.
3K2KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jul, Aug · busiest ÷ quietest = 4.0×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/exterior-filler/trend)
## **Top exterior filler search terms**
- **exterior filler**16K/yr+72.3%10.4% conv. - **toupret masonry repair filler**7K/yr+143.1%11.0% conv. - **render repair exterior**6K/yr+246.8%6.9% conv. - **exterior masonry filler**7K/yr+143.8%8.6% conv. - **render**7K/yr+41.5%2.0% conv. - **masonry filler exterior**6K/yr+73.6%11.3% conv. - **render repair**10K/yr-29.7%5.1% conv. - **masonry filler**5K/yr+47.5%6.9% conv. - **exterior filler for masonry**8K/yr+45.1%13.4% conv. - **outdoor filler**4K/yr+52.3%11.1% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/exterior-filler/search-terms)
## **Top exterior filler 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%4%£4K8%£9K12%£13K16%£18K101001K10K 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**Toupret Masonry Repair Filler - Weather-Resistant Powder Filler for Exterior & Damp Masonry - No Shrink Shapeable Deep Fills - Paint-Ready in 4872hours - Cement-Based Repair Powder - 1.5kg**Toupret**£10.54**4.6★404 rev](https://www.amazon.co.uk/dp/B096KPGCSX) [2**Ronseal - Smooth Finish Exterior Multi Purpose Ready Mix Filler Tub 1.2 kg**Ronseal**£8.10**4.4★3,064 rev](https://www.amazon.co.uk/dp/B0046QDVA0) [3**Bostik Cementone Render Repair Mortar 10kg - Durable Repair & Patching Mortar - Ready Mixed Just Add Water - Ideal for Weather & Impact Damage - Interior & Exterior Use**Bostik**£13.04**4.5★1,099 rev](https://www.amazon.co.uk/dp/B01D8FRGMI) [4**Bartoline Ready Mixed Exterior Filler Tube 330g Weather-Resistant No Shrinkage Easy Application Ideal for Outdoor Repairs**Bartoline**£4.94**4.3★94 rev](https://www.amazon.co.uk/dp/B0CN9SKZ63) [5**Toupret Quick Fill Exterior Filler - Fast-Dry Ready Mixed Masonry Repair Paste - Paintable in 30 Minutes No Shrink or Crack - For Walls & Render - 1L**Toupret**£15.27**4.5★31 rev](https://www.amazon.co.uk/dp/B097DYRQHK)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Gorilla Smooth Finish Wall Filler 473ml Applies Purple & Dries White | Repairs Small and Large Holes in Walls & Ceiling Smooth Finish Wont Shrink or Crack Fills any Depth| Indoor & Outdoor Use**GORILLA**£8.96**326 rev10mo ago](https://www.amazon.co.uk/dp/B0FP4WYY8C) [**SX Siroflex Mortar Repair Cement Grey Ready to use repair mortar for Pointing jobs & Damaged Masonry Joints - Adheres without primer on Damp Surfaces - Interior & Exterior 300ml**Siroflex**£3.77**1,283 rev3y ago](https://www.amazon.co.uk/dp/B0C69MG58L) [**Bartoline 1876 Ready to Use All Purpose Filler 1kg Professional Quality for Plaster Wood Brick and Stone Easy to Apply & Sand**Bartoline**£3.27**381 rev3y ago](https://www.amazon.co.uk/dp/B0BGSCNWZN) [**Bartoline Ready Mixed Exterior Filler Tube 330g Weather-Resistant No Shrinkage Easy Application Ideal for Outdoor Repairs**Bartoline**£4.94**94 rev4y ago](https://www.amazon.co.uk/dp/B0CN9SKZ63) [**Toupret Masonry Repair Filler - Weather-Resistant Powder Filler for Exterior & Damp Masonry - No Shrink Shapeable Deep Fills - Paint-Ready in 4872hours - Cement-Based Repair Powder - 5kg**Toupret**£22.22**89 rev5y ago](https://www.amazon.co.uk/dp/B0983YC3SG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Toupret Quick Fill Exterior Filler - Fast-Dry Ready Mixed Masonry Repair Paste - Paintable in 30 Minutes No Shrink or Crack - For Walls & Render - 1L**Toupret**£15.27**4.5★**▲ 61%**](https://www.amazon.co.uk/dp/B097DYRQHK) [**Bartoline Exterior Filler Powder 1.5 kg Heavy-Duty Cement-Based Repair for Brick Wood & Stone Crack-Free & Weatherproof**Bartoline**£3.85**4.4★**▲ 40%**](https://www.amazon.co.uk/dp/B08C81GNXJ) [**Tetrion All Purpose Ready Mixed Filler 2kg**Tetrion**£8.42**3.7★**▲ 31%**](https://www.amazon.co.uk/dp/B06XB3DTRK) [**Gorilla Smooth Finish Wall Filler 473ml Applies Purple & Dries White | Repairs Small and Large Holes in Walls & Ceiling Smooth Finish Wont Shrink or Crack Fills any Depth| Indoor & Outdoor Use**GORILLA**£8.96**4.6★**▲ 28%**](https://www.amazon.co.uk/dp/B0FP4WYY8C) [**Bartoline 1876 Ready to Use All Purpose Filler 1kg Professional Quality for Plaster Wood Brick and Stone Easy to Apply & Sand**Bartoline**£3.27**4.4★**▲ 24%**](https://www.amazon.co.uk/dp/B0BGSCNWZN)
**~~View all trending →~~**
## **What buyers say about exterior filler**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**23%
*“Easy to use”*
**Quality-Overall**22%
*“Overall, the quality of the product itself emphasizes reliability,”*
**Advertised Vs Actual Product**12%
*“As Advertised”*
**Value For Money**8%
*“Excellent value”*
**Efficiency**4%
*“Works great”*
**Color**3%
*“Good basic colour”*
**Maintenance And Repair**2%
*“Ideal for repairs and making good”*
**Stitch/Finish/Polish**2%
*“Really smooth finish thats easy to work with”*
**Moist/Dry**2%
*“Decent filler and dries well”*
**Adhesion/Stickiness**2%
*“it adheres well without having to prep the surface beyond blowing off any dust”*
### **What buyers complain about **
**Ease Of Use**14%
*“Hard to squeeze out”*
**Quality-Overall**13%
*“Good product let down by poor quality control”*
**Hard Feel**10%
*“It went off hard by next day”*
**Leak-Proof**8%
*“Arrived having completely leaked out into the box”*
**Color**8%
*“not brilliant white maybe”*
**Value For Money**6%
*“not cheap”*
**Size-Overall**5%
*“NOT FITFOR PURPOSE”*
**Functionality-Overall**4%
*“Not fit for purpose”*
**Adhesion/Stickiness**3%
*“no adhesion”*
**Durability**3%
*“unfortunately a few days later it has crumbled away”*
### **Top return reasons **
**Leak-Proof**29%
**Defective Material/Parts**14%
**Functionality-Overall**8%
**Size-Overall**7%
**Color**6%
**Ease Of Use**6%
**Hard Feel**4%
**Product Condition**4%
**Maintenance And Repair**3%
**Quality-Overall**3%
## **Common questions**
- **Is exterior filler profitable to sell on Amazon United Kingdom?**
- The niche generates £110K/yr across 28 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +62.2%. Flapen's verdict: Worth a look (60/100).
- **How competitive is the exterior filler niche?**
- 16 brands and 112 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 75% of demand.
- **What do buyers complain about in exterior filler?**
- Top complaints mined from reviews: Ease Of Use, Quality-Overall, Hard Feel. The return rate is 0.4%.
- **When does demand for exterior filler peak?**
- Demand peaks in Apr–May–Jul–Aug; the busiest month runs 4.0× the quietest.
- **What does it cost to enter the exterior filler niche?**
- Listings span £3.27–£22.22; the average listing price is £8.40 (sweet spot $15–$100). The average incumbent carries 1,736 reviews — the moat a new listing must climb.
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