PETG Flame Retardant V0

PETG V0 is a flame-retardant grade of PETG certified to UL94 V0 (self-extinguishing, no flaming drips). It is used for products requiring fire safety certification — electronics enclosures, architectural elements, public installations.

Classifications

Grade	Fire rating	Notes
V0	Most stringent — self-extinguishing within 10s, no drips	Certified for regulated applications
B1S1D0	European classification — limited fire propagation, low smoke	Less strict than V0 but still fire-resistant

Note

In practice, B1S1D0 PETG can be easier to print than V0 PETG, with better flow stability (confirmed by multiple customers).

Suppliers

• Formfutura — PETG V0 and PETG B1S1D0. Contact Formfutura sales for B2B pricing.

Print settings

PETG V0 typically extrudes at lower temperatures than standard PETG because the flame retardant additives change the melt viscosity:

Parameter	PETG V0	Standard PETG
Feeding zone	190–200°C	220–230°C
Melting zone	200–210°C	230–240°C
Nozzle zone	200–210°C	235–245°C
Bed temp	70–80°C	70–80°C

Note

Start at the lower end and increase by 5°C if flow is inconsistent. Do not apply standard PETG temperatures to V0 — it will over-flow and cause oozing.

Common issues

Moisture absorption (critical)

The flame retardant additives in V0 PETG absorb moisture more readily than standard PETG.

Visual signs of wet V0 pellets:

• Yellowish discoloration of pellets
• Small bubble or drop visible inside the granule (water trapped during pellet manufacturing)
• Foamy, bubbly extrusion

Always dry PETG V0 thoroughly before printing, even if the bag appears sealed:

• Temperature: 65–70°C
• Duration: 6–8 hours minimum
• See Dryer best practices and PETG foaming and moisture

Sticking to the screw (getting stuck)

PETG V0 can adhere to the screw surface more than standard PETG, causing inconsistent extrusion or feeding problems.

Fix: add a small amount of SmoothFlow lubricant or Liquid Masterbatch to the pellets before loading. The oil matrix in liquid masterbatch acts as a lubricant, and SmoothFlow is specifically designed for this.

Tip

Tip from Davide: “Usually PETG is getting stuck to the screw — if you put a bit of plastic lubricant or liquid color it solves the problem.”

Batch quality warning

Caution

Formfutura PETG V0 — batch quality issues: some batches have been reported with yellowish pellets and trapped moisture that causes foaming and poor print quality even after drying. If you receive a batch with discolored (yellowish) pellets or persistent foaming that drying does not resolve, contact Formfutura to report the batch and request a replacement. This is a known batch-level quality variation, not a printing parameter issue.

Instability compared to standard PETG

Some batches of V0 PETG can be inconsistent in quality — the flame retardant compound is a separate additive and its distribution in the pellet affects flow. If you experience unexpected behavior:

1. Dry thoroughly
2. Compare with a small sample of standard PETG to isolate the variable
3. Try PETG B1S1D0 as an alternative if V0 is causing persistent issues

Safety note on fumes

Flame retardant additives can release different compounds than standard PETG when melted. Always print in a well-ventilated space or with an air filtration system. Do not heat above the recommended temperature — thermal degradation of the additives produces more off-gassing.

Related notes

• PETG clear — standard PETG reference
• PETG GF glass fiber — GF-reinforced PETG
• PETG foaming and moisture — moisture troubleshooting
• Dryer best practices — drying protocol
• SmoothFlow — lubricant to prevent screw sticking
• Liquid Masterbatch — can double as a lubricant when mixed with pellets