Prusament · Flame-Retardant Filament
PETG V0
The one-in-the-world UL-certified self-extinguishing PETG. Tough, easy to print and halogen-free — engineered for the housings and insulating parts that can’t be allowed to spread a flame.
V-0
UL94 flammability class · IEC 60695-11-10
230°C
Nozzle temp · prints on desktop Prusa
±0.02mm
Guaranteed diameter tolerance
Halogen-free
Less harmful fumes when burning
The certification
UL-certified self-extinguishing
Prusa asked UL to test the flammability of PETG V0. Tested to the IEC 60695-11-10 standard, it earned a UL94 V-0 rating in both colors — documented on a UL Blue Card certificate.
When PETG V0 starts to burn, it forms a carbonized crust on the surface that starves the flame of oxygen and extinguishes it. It is otherwise a tough material with good thermal and chemical resistance, low warping, and halogen-free chemistry that produces less harmful fumes.
Because it is standard Prusament under the hood, it prints on common desktop machines — no industrial system required.
Prusament PETG V0, made in-house by Prusa Research to ±0.02 mm tolerance. Source: prusa3d.com.
Where it goes to work
Industries & applications
Wherever a plastic part sits near current, heat or passengers, a self-extinguishing housing is a safer default than standard PETG.
Electronics enclosures
Housings and insulating parts for electronic appliances — the flagship use for a self-extinguishing filament, from Raspberry Pi cases to control-box lids.
Defense & industrial
Field enclosures, brackets and fixtures where a flammability rating is part of the spec, printed on machines you already own.
Transit & rail
Interior brackets, cable management and housings for environments where fire behavior of onboard plastics matters.
Print parameters
Easy to print, no special hardware
PETG V0 runs on a standard hot end at everyday temperatures. It is more hygroscopic than regular PETG, so keep it dry (or dry 6 h at 55 °C) and print on a textured or satin sheet.
230 ±10°C
Nozzle temperature
Standard brass nozzle is fine
80 ±10°C
Heatbed temperature
Low shrinkage — large parts print flat
Textured / Satin
Recommended print sheet
Avoid smooth PEI (adheres too strongly)
The whole workflow, from one supplier
Printer, print sheet, material — validated together
No special hardware required. Nozzle 230 ±10 °C through a standard brass nozzle, heatbed 80 ±10 °C, and a textured or satin sheet rather than smooth PEI — which PETG grips too strongly. Prusa makes the printer, the sheet and the filament, so the machine profile and the material are tuned to one another. Note that UL established the V-0 classification on the MK3S+, MK4 and XL — talk to us before relying on the rating from another machine.
01 · The machine
Original Prusa XL+ Assembled
CoreXY with a 360 × 360 × 360 mm build volume — room for a full flame-retardant enclosure or cable tray in one piece. PETG V0 sits well inside its 290 °C nozzle and 120 °C heatbed envelope.
Buy the XL+ →+
02 · The surface
Satin Powder-coated Sheet
PETG bonds hard to smooth PEI — hard enough to lift the coating on removal. The satin powder-coated surface sits between smooth and textured: a lightly textured matte finish that Prusa rates for optimal PETG adhesion, with no glue stick needed. It is the sheet the XL+ ships with, sized for the 360 × 360 mm segmented heatbed. Never clean it with acetone.
Buy the satin sheet →+
03 · The material
Prusament PETG V0 Jet Black
UL-certified self-extinguishing PETG, made in-house to a guaranteed ±0.02 mm tolerance.
Talk to an Expert →= one validated flame-retardant workflow — sourced, supported and warrantied through a single US-based team.
Keep it dry: PETG V0 is more hygroscopic than standard PETG. Dry 6 h at 55 °C before critical prints, or store it in an USS Dry Box.
Specifying a flame-retardant part?
Send us the enclosure that needs a flammability rating — our US-based team will help you validate it. Safety data sheets, material certifications and origin documentation are available on request.