Prusament · Super Polymer Special order
PEI 1010
Polyetherimide — the polymer branded ULTEM — is one of the most resistant materials you can 3D print. Flame-retardant, gamma-resistant and strong enough to replace aluminum alloys, made in-house by Prusa Research.
Flame-retardant
Inherently self-extinguishing · no additive package
Gamma-resistant
Holds up under radiation exposure
Metal-replacing
Strong enough to substitute for aluminum alloys
Chemical-resistant
Very good resistance at high working temperatures
The whole workflow, from one supplier
Printer, sheet, dry box, material — fully integrated
PEI 1010 cannot be printed on the MK, XL or MINI series — the temperatures simply are not attainable. It needs a heated chamber of 90 °C or more, a 410 ±10 °C nozzle and a 150 ±10 °C heatbed. It also absorbs moisture extremely readily, so Prusa requires it to be dried before every print and kept in a dry box while printing. Prusa makes every link in that chain — the machine, the print surface, the dry box and the filament — so the profile, the sheet and the material are validated together.
01 · The machine
Prusa Pro HT90
The industrial platform with an actively heated 90 °C+ chamber — Prusa names it as the printer for PEI 1010. In stock.
Buy the Pro HT90 →+
02 · The surface
HT90 HighTemp Print Sheet
Prusa’s recommended steel sheet for PEI 1010 on the Pro HT90. PEI bonds strongly to a PEI surface, so the right sheet and a separation layer matter. In stock.
Buy the print sheet →+
03 · Dry storage
Prusa USS Drybox
PEI is extremely hygroscopic and has to stay dry while it prints, not just before. This sealed box holds the spool and feeds the printer directly — load it once and leave it in there until the spool is empty.
Buy the USS Drybox →+
04 · The material
Prusament PEI 1010
ULTEM-class polyetherimide, made in-house by Prusa Research to a guaranteed ±0.05 mm tolerance. Special order — we scope quantity, lead time and pricing with you.
Talk to an Expert →= one validated high-temperature workflow — sourced, supported and warrantied through a single US-based team.
The Pro HT90 reaches PEI 1010’s 410 °C nozzle target with its High Temperature print head.
The material
An ULTEM-class super polymer
PEI 1010 (polyetherimide, branded ULTEM) is one of the most resistant 3D-printing polymers available — built for specialized, demanding industrial work. It combines great high-temperature and chemical resistance with excellent mechanical properties.
It is inherently flame-retardant and resistant to gamma radiation, and as one of the most resistant materials it can go straight into service as a functional part — even as a replacement for aluminum alloys. That combination makes it usable across aerospace, medical and other high-demand applications.
Made in-house by Prusa Research to a guaranteed ±0.05 mm diameter tolerance.
Prusament PEI 1010 Natural.
What it takes to print
Built for the Pro HT90 — and only the Pro HT90
410 °C
Nozzle temperature
±10 °C · High Temperature print head
150 °C
Heatbed temperature
±10 °C on the HighTemp print sheet
90 °C+
Heated chamber
Actively heated · Pro HT90 required
±0.05 mm
Diameter tolerance
Guaranteed, made in-house by Prusa
Handling note: PEI 1010 is extremely prone to moisture absorption. It must be dried before every print and kept in a dry box while printing, and large prints are prone to warping. Our team can advise on drying, chamber setup and part orientation.
Where it goes to work
Industries & applications
PEI 1010 is for parts that have to survive heat, chemicals and stress that would defeat ordinary engineering plastics.
Aerospace
Lightweight, high-strength functional components that tolerate elevated temperatures and gamma exposure — a printable route to parts once reserved for metal.
Defense
Flame-retardant, chemically resistant housings and structural parts for demanding field and platform environments.
High-temp tooling
Jigs, fixtures and tooling that keep their shape and strength at working temperatures where standard polymers soften.
Traceable, spool by spool
Made in-house, measured on the line and published — you can check the exact spool before it ever reaches the printer.
Made in-house
Prusa Research is the only 3D-printer manufacturer producing its own filament. Prusament PEI 1010 is made in-house to a guaranteed ±0.05 mm diameter tolerance, with the whole manufacturing process monitored and tested — string diameter, color consistency and mechanical properties.
Per-spool data via QR
Prusa is the only manufacturer that lets you inspect the parameters of every spool it makes. Scan the QR code on the spool to see that spool’s published data online — diameter consistency, ovality, weight, length and standard deviation against the stated tolerance.
Smart, offline spools
PEI 1010 ships on an NFC spool. New Prusament spools carry a rewritable NFC tag on the open OpenPrintTag standard: essential material data stored on the tag and read entirely offline — no cloud, no vendor lock-in.
Scoping an ULTEM-class part?
PEI 1010 is a special-order, made-in-house material printed on the Prusa Pro HT90. Tell us about the part and its environment — our US-based team will map the material, machine and pricing for your program. Safety data sheets, material certifications and origin documentation are available on request.