PEEK Filament
The pinnacle of printable thermoplastics. PEEK is a semi-crystalline high-performance polymer with extreme heat resistance (continuous use ~250 °C), outstanding chemical and wear resistance, and metal-rivaling strength-to-weight — aerospace, medical, and oil-and-gas grade.
What is PEEK filament?
PEEK (Polyether ether ketone) is one of the highest-performance thermoplastics available, a semi-crystalline polymer with a glass transition near 143 °C and a melting point around 343 °C. It offers continuous-use temperatures near 250 °C, excellent chemical and wear resistance, inherent flame retardancy, and strength that lets it replace metal in demanding parts.
Printing PEEK requires specialized hardware: a high-temp hotend (400 °C+), a heated chamber, and a high-temperature bed, plus careful thermal management to achieve proper crystallization and mechanical performance. It's used in aerospace brackets, medical implants and instruments, and chemical/oil-and-gas components.
PEEK vs PEI (ULTEM) vs PC — how to choose
All three are high-performance; they differ in ceiling and printability:
Not sure PEEK is warranted? Call (248) 707-2950 — PEI or PC often meets the spec at a fraction of the difficulty.
Printing PEEK successfully
- High-temp printer required — 400 °C+ hotend, heated chamber (~90 °C+), and high-temp bed.
- Dry rigorously — PEEK must be very dry; even small moisture degrades results.
- Manage crystallization — chamber temperature and cooling determine whether parts reach full strength (amorphous vs crystalline).
- Anneal if specified to develop crystallinity and maximize heat/chemical resistance.
- Consult the datasheet — profiles are grade-specific and unforgiving.
PEEK brands stocked at Rev1
Rev1 Technologies stocks PEEK filament from multiple brands, all shipped from Auburn Hills, Michigan with real phone support. PEEK is grade- and printer-specific — Use the brand filter below to narrow the range, or call (248) 707-2950 for spec, bulk, and color-match help.