filament welder
Skip itBrand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Avg price
Incredible$34.02avg listing price — sweet spot $15–$100
Quality gap
Great4.1★avg incumbent rating — lower means beatable quality
Price range
Great$9.29–$45.21cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good652.64avg incumbent reviews — the moat a new listing must climb
Returns
Good2.9%return rate — above 5% kills the launch gate
Market size
Okay$271K$271K/yr · 297K searches
Conversion
Okay2.7%search→purchase rate — share of searches ending in a sale
Growth
Okay+1.5%90-day search growth — must beat 0% to launch
Competition
Bad78%top-5 click share — a locked-up shelf
Brand share
Bad98%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, filament welder is a $271K/yr Amazon United States market (297K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in Jan. Verdict: Skip it — 45/100.
Data updated Aug 6, 2026 · scored weekly · How we score niches
filament welder market data
- Units sold / yr
- 10K–13K
- avg 1,000–1,250/product
- Revenue / yr
- $340K–$425K
- units × avg price
- Conversion rate
- 2.7%
- Avg BSR
- #521
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 91%
- Out of stock
- 0.0%
- Avg brand age
- 26 months
- Avg seller age
- 193 days
Competition & brand share
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 flat
Sellers
10
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
78%
Top 20: 100%
Open market
0%
- SUNLU40%
- YOOPAI35%
- VIT SPORT12%
- ROLWAY5%
- IdeaFormer IR35%
- kunphy2%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +1.5% search growth over the last 90 days.Peak months: Jan · busiest ÷ quietest = 2.1×
Top filament welder search terms
- filament connector84K/yr
- filament splicer65K/yr
- sunlu filament connector59K/yr
- filament joiner23K/yr
- sunlu filament splicer13K/yr
- filament welder18K/yr
- filament fuser9K/yr
- 3d filament splicer7K/yr
- filament splicer 1.75mm5K/yr
- filament melter3K/yr
Top filament welder 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.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SUNLU Official Filament Connector Fast Heating Filament Splicer for 3D Printer Filament 1.75mm Up to 240C Compatible with PLA PETG TPU ABS PA Nylon Easy to Use Pack with 200PCS PTFE Sleeve
SUNLU$37.384.1★1,518 rev
SUNLU Filament Connector Filament Splicer with 200Pcs PTFE Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI$39.744.1★1,210 rev
VIT SPORT 1.75mm & 2.85 Filament Connector | Easy Operate Filament Welder Splicer for 3D Printer | Filament Fuser Joiner for PLA/ABS/PC/PETG/TPU Filaments
VIT SPORT$28.654.0★854 rev
Filament Connector SUNLU Official Splicer with 200Pcs PTFE Sleeves for 3D Printer Filament 1.75mm Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI$40.223.9★168 rev
SUNLU Filament Connector Filament Splicer with 400Pcs PTFE Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI$44.654.1★1,210 rev
Newest
by launch dateSUNLU Filament Connector Filament Splicer with 400Pcs PTFE Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI$44.651,210 rev
Filament Connector SUNLU Official Splicer with 400Pcs PTFE Sleeves for 3D Printer Filament 1.75mm Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI$45.2150 rev
VIT SPORT Filament Connector - 1.75mm & 2.85mm Ultimate Splicer for 3D Printer Up to 240 Filament Fuser & Joiner Compatible with PLA ABS TPU PETG PA/PC Material
VIT SPORT$29.87146 rev
KUNPHY PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Filament Welder Compatible with PLA PETG and ABS
kunphy$17.78135 rev
SUNLU Official Filament Connector 400Pcs PTFE Sleeve Filament Splicer for 3D Printer Filament 1.75mm Fast Heating Filament Welder Compatible with PLA PETG TPU ABS PA Nylon Easy to Use
SUNLU$43.351,518 rev
Trending
90-day click momentum
SUNLU Filament Connector Filament Joiner Includes 200 PTFE Sleeves
ROLWAY$38.154.2★
SUNLU Filament Connector Filament Splicer with 400Pcs PTFE Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI$44.654.1★
VIT SPORT 1.75mm & 2.85 Filament Connector | Easy Operate Filament Welder Splicer for 3D Printer | Filament Fuser Joiner for PLA/ABS/PC/PETG/TPU Filaments
VIT SPORT$28.654.0★
IdeaFormer 3D Printer Filament Welder & Joiner Connects Broken Filament Sensor for Most 1.75mm Filament Accessory (Black)
IdeaFormer IR3$9.293.6★
SUNLU Official Filament Connector Fast Heating Filament Splicer for 3D Printer Filament 1.75mm Up to 240C Compatible with PLA PETG TPU ABS PA Nylon Easy to Use Pack with 200PCS PTFE Sleeve
SUNLU$37.384.1★
What buyers say about filament welder
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to use”
“it is doing quite well for my use”
“Works as intended, love it”
“Works GREAT and the price is very affordable”
“I've used it on PLA, PLA+, and PLA+ 2.0 matt, silk, marble and standard types and it does excellent, so I'm fairly confident that it will be compatible with most others as well”
“It melts/blends the two ends real fast and is strong”
“Machine works great takes patience though”
“Easy to follow instructions”
“You can either hook the last little bit together or you can make some cools color changes”
“It fits”
What buyers complain about
“Doesnt work”
“Difficult to use”
“Not as good as I thought it would be”
“it gets really hot within a few minutes I think something inside it melted”
“At this price point I expected a more intuitive experience”
“the connections it makes are bad”
“Brittle connections”
“its smaller than I thought it would be”
“My print got hung up right at the first splice it came to and failed”
“it will break off within the extruder”
Top return reasons
Common questions
- Is filament welder profitable to sell on Amazon United States?
- The niche generates $271K/yr across 11 tracked products. 90-day search growth is +1.5%. Flapen's verdict: Skip it (45/100).
- How competitive is the filament welder niche?
- 6 brands and 10 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in filament welder?
- Top complaints mined from reviews: Functionality-Overall, Ease Of Use, Quality-Overall. The return rate is 2.9%.
- When does demand for filament welder peak?
- Demand peaks in Jan; the busiest month runs 2.1× the quietest.
- What does it cost to enter the filament welder niche?
- Listings span $9.29–$45.21; the average listing price is $34.02 (sweet spot $15–$100). The average incumbent carries 653 reviews — the moat a new listing must climb.