---
title: "Filament Joiner — £32K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/business-industry-science/filament-joiner"
last_updated: "2026-07-31T10:37:15.528Z"
locale: en
meta:
description: "Niche score 37/100 · £32K/yr market · 32K searches/yr · £21.35 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 37/100 · £32K/yr market · 32K searches/yr · £21.35 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Filament Joiner — £32K/yr Amazon UK Niche (2026) - Flapen"
---
# **filament joiner**
**Skip it**
Soft demand (-47.6% this quarter) — this niche doesn't clear our bar today.
Market size 8Growth 1Conversion 55Competition 6Returns 74Price range 72Avg price 91Brand share 8Review moat 74Quality gap 95
**Quality gap**
**Incredible****4.0★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Great****£21.35**
avg listing price — sweet spot $15–$100
**Review moat**
**Good****555.43**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Good****2.0%**
return rate — above 5% kills the launch gate
**Price range**
**Good****£6.46–£36.82**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****4.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£32K**
£32K/yr · 32K searches
**Brand share**
**Bad****97%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****93%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-47.6%**
90-day search growth — must beat 0% to launch
**Signals**[** Quality Gap**](https://flapen.com/research/niches?market=uk&signal=quality_gap "Avg rating < 4.0")
According to Flapen's Amazon United Kingdom niche tracking, filament joiner is a £32K/yr Amazon United Kingdom market (32K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 37/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **filament joiner market data**
- **Units sold / yr**
- **1K–2K**
- avg 100–250/product
- **Revenue / yr**
- **£27K–£32K**
- units × avg price
- **Conversion rate**
- **4.6%**
- **Avg BSR**
- **#632**
- **Page quality**
- **0%**
- **Prime**
- **86%**
- **Sponsored**
- **71%**
- **Out of stock**
- **22.2%**
- **Avg brand age**
- **25 months**
- **Avg seller age**
- **227 days**
## **Competition & brand share**
The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**6 **—flat
**Sellers**
**10**
**Top-5 brand share**
**97%**
Top 20: 100%
**Top-5 click share**
**93%**
Top 20: 100%
**Open market**
**0%**
- SUNLU58% - YOOPAI20% - kunphy9% - Hyuduo6% - VIT SPORT4% - CQEAZ3%
## **Demand**
Weekly Amazon search volume, last 32 weeks — -47.6% search growth over the last 90 days.
2K2KSpike '26Dec '25Jan '26Feb '26Mar '26Apr '26May '26
[**Open Trend **](https://flapen.com/research/uk/business-industry-science/filament-joiner/trend)
## **Top filament joiner search terms**
- **filament joiner**15K/yr-43.9%5.3% conv. - **filament connector**7K/yr-46.7%2.7% conv. - **sunlu filament connector**7K/yr-63.5%9.2% conv. - **filament splicer**4K/yr-29.1%2.9% conv. [**All search terms **](https://flapen.com/research/uk/business-industry-science/filament-joiner/search-terms)
## **Top filament joiner 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%15%£5K30%£10K45%£14K60%£19K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 7 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SUNLU Official Filament Joiner Filament Connector with 200 PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Compatible with PLA PETG TPU ABS PA Nylon Easy to Use**SUNLU**£28.16**4.3★1,305 rev](https://www.amazon.co.uk/dp/B0D9GD8KPW) [2**Filament Joiner SUNLU Filament Connector with 200PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon**YOOPAI**£30.94**4.2★1,152 rev](https://www.amazon.co.uk/dp/B0DLBJB9MD) [3**PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Thread Welder Compatible with PLA PETG and ABS**kunphy**£11.85**4.6★125 rev](https://www.amazon.co.uk/dp/B0DPW2QH3G) [4**Filament Welder Connector Premium Aluminum Alloy 3D Printer Filament Connector Sensor for Reliable Multi Color Printing and Broken Filament Repair 1.75mm Red**Hyuduo**£6.46**3.2★9 rev](https://www.amazon.co.uk/dp/B0BRNPJNFS) [5**YOOPAI Filament Joiner Filament Connector with 400PCS PTFE Tubes Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon**YOOPAI**£36.82**4.2★1,152 rev](https://www.amazon.co.uk/dp/B0FGX8QFDC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**CQEAZ 1.75MM Filament Welder Connectors Joiner PTFE Tubes Filaments Splicer Welding Tubes 100/200pcs for 3D Printer Filament Welder**CQEAZ**£8.03**3 rev1y ago](https://www.amazon.co.uk/dp/B0F7LYRVSM) [**VIT SPORT Filament Connector - Ultimate 1.75mm 3D Printer Filament Splicer Up to 240C Fuser & Joiner Compatible with PLA ABS TPU PETG PA/PC Includes 200 Silicone Tubes**VIT SPORT**£27.17**142 rev1y ago](https://www.amazon.co.uk/dp/B0DTDWKW7Z) [**YOOPAI Filament Joiner Filament Connector with 400PCS PTFE Tubes Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon**YOOPAI**£36.82**1,152 rev1y ago](https://www.amazon.co.uk/dp/B0FGX8QFDC) [**PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Thread Welder Compatible with PLA PETG and ABS**kunphy**£11.85**125 rev1y ago](https://www.amazon.co.uk/dp/B0DPW2QH3G) [**Filament Joiner SUNLU Filament Connector with 200PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon**YOOPAI**£30.94**1,152 rev1y ago](https://www.amazon.co.uk/dp/B0DLBJB9MD)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Filament Welder Connector Premium Aluminum Alloy 3D Printer Filament Connector Sensor for Reliable Multi Color Printing and Broken Filament Repair 1.75mm Red**Hyuduo**£6.46**3.2★**▲ 29%**](https://www.amazon.co.uk/dp/B0BRNPJNFS) [**PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Thread Welder Compatible with PLA PETG and ABS**kunphy**£11.85**4.6★**▲ 25%**](https://www.amazon.co.uk/dp/B0DPW2QH3G) [**CQEAZ 1.75MM Filament Welder Connectors Joiner PTFE Tubes Filaments Splicer Welding Tubes 100/200pcs for 3D Printer Filament Welder**CQEAZ**£8.03**3.2★**▲ 21%**](https://www.amazon.co.uk/dp/B0F7LYRVSM) [**SUNLU Official Filament Joiner Filament Connector with 200 PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Compatible with PLA PETG TPU ABS PA Nylon Easy to Use**SUNLU**£28.16**4.3★**— 9%**](https://www.amazon.co.uk/dp/B0D9GD8KPW) [**YOOPAI Filament Joiner Filament Connector with 400PCS PTFE Tubes Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon**YOOPAI**£36.82**4.2★**▼ 12%**](https://www.amazon.co.uk/dp/B0FGX8QFDC)
**~~View all trending →~~**
## **What buyers say about filament joiner**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**32%
*“Does the job”*
**Quality-Overall**23%
*“Build quality feels good for a workshop tool”*
**Ease Of Use**13%
*“easy to use”*
**Functionality-Overall**6%
*“if your looking for s filament joiner then they this one works perfect and highly recommend”*
**Print Quality**5%
*“that can be easily printed off”*
**Socket/Port/Plug**3%
*“ent connector”*
**Material Quality**3%
*“great item to use use odd bits of filament”*
**Eco Friendliness**2%
*“Saves waste FDM”*
**Value For Money**2%
*“Great Value Kit”*
**Color**2%
*“It's also fun to stitch together random colours of filament”*
### **What buyers complain about **
**Ease Of Use**28%
*“Not easy to use”*
**Size-Overall**15%
*“It is actually very very small”*
**Thickness**11%
*“They are too thick to use in the machine”*
**Functionality-Overall**6%
*“Doesnt turn on”*
**Maintenance And Repair**6%
*“could be improved”*
**Defective Material/Parts**6%
*“Doesnt turn on”*
**Value For Money**4%
*“if a little pricey”*
### **Top return reasons **
**Functionality-Overall**46%
**Advertised Vs Actual Product**8%
**Touch/Button Controls**7%
**Socket/Port/Plug**6%
**Defective Material/Parts**6%
**Connectivity-Overall**5%
**Instructions/User Manual/Troubleshooting**4%
**Heating**3%
**Ease Of Use**3%
**Jamming/Clogging**3%
## **Common questions**
- **Is filament joiner profitable to sell on Amazon United Kingdom?**
- The niche generates £32K/yr across 7 tracked products. 90-day search growth is -47.6%. Flapen's verdict: Skip it (37/100).
- **How competitive is the filament joiner niche?**
- 6 brands and 10 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 97% of demand.
- **What do buyers complain about in filament joiner?**
- Top complaints mined from reviews: Ease Of Use, Size-Overall, Thickness. The return rate is 2.0%.
- **What does it cost to enter the filament joiner niche?**
- Listings span £6.46–£36.82; the average listing price is £21.35 (sweet spot $15–$100). The average incumbent carries 555 reviews — the moat a new listing must climb.
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