Overview

ULTEM 9085 PEI filament combining flame retardancy with a high strength-to-weight ratio; 2000 g spools fit Stratasys printers.

Summarised from the 3D4Makers product page.

Features

Flame retardant (UL 94 V-0)
High strength-to-weight ratio
Stratasys-compatible 2000 g spools

Material type: High Performance
Brand family: 3D4Makers
Polymer: PEI
Processing technology: FFF
Material form: Filament
Manufacturer: 3D4Makers
Reinforcements: None

Characteristics

Flame retardantUL 94 rating of V-0, V-1 or V-2 — stops burning on its own once the flame is removed.

Certifications

FAR 25.853 (raw material)Meets the US aviation flammability requirement (FAR 25.853) for materials used inside aircraft cabins.
OSU 55/55 (raw material)Meets the OSU 65/65 heat-release limits used for materials inside aircraft cabins.
EN 45545 R6-HL3 (raw material)Meets the EN 45545 fire-safety standard for materials used in railway vehicles.
UL 94 V-0 (datasheet rating)Flammability rating from the UL 94 test. V-0 is the highest common rating: the flame goes out within 10 seconds with no burning drips.

"Datasheet" means the rating is stated on the manufacturer's datasheet, not a separate certificate. Ask us for the certificate if you need it for an audit.

Applications

Based on this material's datasheet values. Every part is different — ask an engineer to confirm it suits yours.

Physical

: 1.34g/cm³ ASTM D 792
: V-0 UL 94

Thermal

: 186°C

Mechanical

: 3440MPa ASTM D 638, 5 mm/min
: 84MPa ASTM D 638, yield, 5 mm/min

Versus other PEI

See where it ranks against the 15 other PEI materials we stock.

Typical values from each manufacturer's datasheet. Test methods can differ between brands, so treat small gaps as a tie.

Downloads

Technical data sheet (TDS)pei-ultem-9085-filament Download
Quick3D summaryThis page as a printable PDF

Values from the 3D4Makers technical data sheet and product page. Last updated 11 October 2026. Typical values, not guaranteed minimums — see the disclaimer below.

3D4Makers PEI Ultem 9085