---
title: "Filler Primer — £36K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/automotive/filler-primer"
last_updated: "2026-08-09T07:19:15.731Z"
locale: en
meta:
description: "Niche score 34/100 · £36K/yr market · 49K searches/yr · £8.11 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 34/100 · £36K/yr market · 49K searches/yr · £8.11 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Filler Primer — £36K/yr Amazon UK Niche (2026) - Flapen"
---
# **filler primer**
**Skip it**
Prices mostly outside the sweet spot ($5.20–$10.85) — this niche doesn't clear our bar today.
Market size 9Growth 25Conversion 84Competition 16Returns 98Price range 0Avg price 23Brand share 8Review moat 58Quality gap 35
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****9.2%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****1,197.25**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-0.3%**
90-day search growth — must beat 0% to launch
**Avg price**
**Bad****£8.11**
avg listing price — sweet spot $15–$100
**Competition**
**Bad****80%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****£36K**
£36K/yr · 49K searches
**Brand share**
**Bad****97%**
top-5 brand share — brand-locked demand
**Price range**
**Bad****£5.20–£10.85**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, filler primer is a £36K/yr Amazon United Kingdom market (49K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 34/100.
Data updated Jul 18, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **filler primer market data**
- **Units sold / yr**
- **4K–5K**
- avg 250–500/product
- **Revenue / yr**
- **£32K–£41K**
- units × avg price
- **Conversion rate**
- **9.2%**
- **Avg BSR**
- **#43**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **50%**
- **Out of stock**
- **8.1%**
- **Avg brand age**
- **68 months**
- **Avg seller age**
- **186 days**
## **Competition & brand share**
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▼falling
**Sellers**
**20**
**Top-5 brand share**
**97%**
Top 20: 100%
**Top-5 click share**
**80%**
Top 20: 100%
**Open market**
**1%**
- JENOLITE36% - Simoniz31% - Hycote23% - Autotek4% - MOTIP3% - Bartoline2% - Open — no brand owns it (1 brand, 1%)
## **Demand & seasonality**
Weekly Amazon search volume, last 63 weeks — -0.3% search growth over the last 90 days.
2K1KSpike '25 seasonMayJunJulAugSepOctNovDecJanFebMarAprMayJun
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/uk/automotive/filler-primer/trend)
## **Top filler primer search terms**
- **filler primer**22K/yr-0.0%8.8% conv. - **filler primer spray**8K/yr+14.2%9.1% conv. - **filler primer for 3d prints**4K/yr+1.5%7.5% conv. - **primer filler spray paint**4K/yr+7.8%8.7% conv. - **primer filler**4K/yr-5.6%7.7% conv. - **rustoleum filler primer**3K/yr-24.5%4.1% conv. - **spray filler**3K/yr-5.3%5.5% conv. - **filler primer paint**3K/yr-15.7%4.7% conv. [**All search terms **](https://flapen.com/research/uk/automotive/filler-primer/search-terms)
## **Top filler primer 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%£4K20%£7K30%£11K40%£14K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**JENOLITE Primer Filler Spray Paint | WHITE | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More | 400ml**JENOLITE**£10.55**4.4★2,159 rev](https://www.amazon.co.uk/dp/B08VHKMD67) [2**Simoniz SIMB90D High Build Primer Spray Paint Filler Primer Removes Imperfections pre-Paint 500ml**Simoniz**£6.66**4.5★71 rev](https://www.amazon.co.uk/dp/B004R95MV2) [3**Hycote High Build Aerosol Car Spray Paint Filler Primer 400 ml**Hycote**£6.90**4.5★1,389 rev](https://www.amazon.co.uk/dp/B002RS06IE) [4**Simoniz Grey Plastic Primer**Simoniz**£5.20**4.6★669 rev](https://www.amazon.co.uk/dp/B01CSFITYI) [5**JENOLITE Primer Filler Spray Paint | BLACK | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More | 400ml**JENOLITE**£10.43**4.4★2,159 rev](https://www.amazon.co.uk/dp/B08NF7PCHR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**JENOLITE Primer Filler Spray Paint (GREY) | 500ml | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More**JENOLITE**£10.85**2,159 rev4mo ago](https://www.amazon.co.uk/dp/B0GSY1GMZ5) [**Bartoline Filler Primer Grey Spray Paint 400ml Matt Finish Multi-Surface Filler and Primer for Metal Wood Plastic Fills Scratches Fast-Drying High-Coverage Base Coat for Topcoats**Bartoline**£8.84**155 rev11mo ago](https://www.amazon.co.uk/dp/B0FKGNZ36S) [**JENOLITE Plastic Primer Spray Paint | GREY | 400ml | Premium Quality Plastic Primer | Promotes Adhesion | Primer Spray Paint for Automotive Garden Furniture Models & Other Hard Plastics**JENOLITE**£10.41**1,399 rev5y ago](https://www.amazon.co.uk/dp/B08W9BL6F6) [**JENOLITE Primer Filler Spray Paint | WHITE | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More | 400ml**JENOLITE**£10.55**2,159 rev5y ago](https://www.amazon.co.uk/dp/B08VHKMD67) [**JENOLITE Primer Filler Spray Paint | BLACK | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More | 400ml**JENOLITE**£10.43**2,159 rev5y ago](https://www.amazon.co.uk/dp/B08NF7PCHR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**JENOLITE Primer Filler Spray Paint (GREY) | 500ml | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More**JENOLITE**£10.85**4.4★**▲ 196%**](https://www.amazon.co.uk/dp/B0GSY1GMZ5) [**Hycote Bodyshop High Build Aerosol Car Spray Paint Grey Primer 400 ml**Hycote**£5.28**4.6★**▲ 51%**](https://www.amazon.co.uk/dp/B004SHJQ42) [**Simoniz Grey Plastic Primer**Simoniz**£5.20**4.6★**▲ 27%**](https://www.amazon.co.uk/dp/B01CSFITYI) [**Simoniz SIMB90D High Build Primer Spray Paint Filler Primer Removes Imperfections pre-Paint 500ml**Simoniz**£6.66**4.5★**▲ 26%**](https://www.amazon.co.uk/dp/B004R95MV2) [**JENOLITE Primer Filler Spray Paint | WHITE | High Fill Multi-Surface Primer Paint | Fills Small Dents & Scratches | Perfect For Car Bodywork 3D Printer Models & More | 400ml**JENOLITE**£10.55**4.4★**▲ 18%**](https://www.amazon.co.uk/dp/B08VHKMD67)
**~~View all trending →~~**
## **What buyers say about filler primer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**33%
*“Quality filler primer dont look anywhere else”*
**Spray/Flow**13%
*“Great spray primer for van, high quality and easy to spray”*
**Value For Money**11%
*“Definitely worth the extra few quid”*
**Advertised Vs Actual Product**11%
*“Does all it is supposed to to”*
**Paint Quality**7%
*“he really enjoys using this matt finish spray”*
**Functionality-Overall**7%
*“But did go on pretty well”*
**Thickness**6%
*“Nice and thick and very easy to apply”*
**Ease Of Use**4%
*“Easy to use”*
**Material Quality**4%
*“Very good plastic primer”*
**Water Resistance**1%
*“has held up in constant rain”*
### **What buyers complain about **
**Quality-Overall**20%
*“Poor quality”*
**Paint Quality**15%
*“Whilst re-assembling the part I had painted, it started to all flake off”*
**Design-Overall**10%
*“Not high build”*
**Jamming/Clogging**10%
*“.just cloggs up”*
**Spray/Flow**10%
*“Used half way spraying a item when the aerosol stopped working”*
**Thickness**10%
*“remember some of them coming out so thick they splattered”*
**Pressure**10%
*“the can was dead of pressure it splattered all over my bumper causing me more work”*
**Functionality-Overall**5%
*“Doesn't do what it's supposed to do”*
**Color**5%
*“not WHITE as I had searched for”*
### **Top return reasons **
**Color**31%
**Paint Quality**16%
**Compatibility-Overall**9%
**Functionality-Overall**8%
**Advertised Vs Actual Product**7%
**Defective Material/Parts**6%
**Material Quality**5%
**Adhesion/Stickiness**4%
**Spray/Flow**4%
**Product Condition**4%
## **Common questions**
- **Is filler primer profitable to sell on Amazon United Kingdom?**
- The niche generates £36K/yr across 12 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -0.3%. Flapen's verdict: Skip it (34/100).
- **How competitive is the filler primer niche?**
- 7 brands and 20 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 97% of demand.
- **What do buyers complain about in filler primer?**
- Top complaints mined from reviews: Quality-Overall, Paint Quality, Design-Overall. The return rate is 0.3%.
- **When does demand for filler primer peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the filler primer niche?**
- Listings span £5.20–£10.85; the average listing price is £8.11 (sweet spot $15–$100). The average incumbent carries 1,197 reviews — the moat a new listing must climb.
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