TPU 85A

Advanced

Thermoplastic Polyurethane (Shore 85A Hardness)

Very soft, rubber-like flexible filament (Shore 85A). Excellent for extreme flexibility applications. Requires direct-drive extruder. Not compatible with Bambu AMS or Bowden setups.

⚠ IMPORTANT: Dry Your Filament Before Every Print

All filaments — including TPU 85A — absorb moisture from the air. Printing with wet filament causes stringing, bubbling, weak layer adhesion, and poor surface finish. This is the single most overlooked cause of bad prints.

Always dry your filament per the manufacturer's recommendations printed on the spool label before printing, especially if the spool has been open for more than a few days or stored in a humid environment. Read our complete filament drying guide →

About the Temperatures & Speeds Listed Below

The print temperatures and speeds shown on this page are general industry ranges — not a one-size-fits-all prescription. Every printer brand and model has different capabilities. A Bambu Lab X1C can print PLA at 500 mm/s; an Ender 3 with a Bowden extruder performs best at 40–80 mm/s.

Always follow your specific printer manufacturer's recommended settings and the temperature range printed on your filament spool label. Start at the lower end of the range and dial in from there.

Material Properties

Strength5/10

Flexibility9/10

Heat Resistance4/10

Printability3/10

TPU 85A is part of the TPU family. See the complete TPU guide →

Best For

Custom gaskets
vibration dampeners
RC car tires
wearable items
ultra-flexible grips

Avoid For

Beginners / first prints

Pro Tips

01Requires direct-drive extruder with constrained filament path; reduce speed to 20-30mm/s
02Set retraction to 1-2mm or off; high retraction causes jams with soft filament
03Always use glue stick as barrier between filament and bed surface

Print Speed by Printer Tier

Print speeds vary dramatically by printer. The speeds listed in product specs (like "500 mm/s") are maximum capabilities — not recommended everyday speeds. Use this table as a general guide and always follow your printer manufacturer's recommended settings.

High-End (Bambu X1C, P2S, H2D)

Print Speed: 150–300 mm/s

High-acceleration direct-drive systems. Follow manufacturer slicer presets.

Mid-Range (Bambu A1/A1 Mini, Prusa MK4, Creality K1)

Print Speed: 60–150 mm/s

Good performance at moderate speeds. Follow slicer presets for best results.

Entry-Level (Ender 3 series, Bowden extruders)

Print Speed: 30–60 mm/s

Start slow and tune up. Follow your printer manufacturer's recommended settings.

Quick Specs

Print Temp215–240°C

Bed Temp30–50°C

Cost / kg$30–$50

EnclosureNot Required

DryingRequired

DifficultyAdvanced

Drying Note: Even filaments marked "Not Required" benefit from drying if the spool has been open or stored in a humid area. When in doubt, dry it.

Buy TPU 85A Filament

Recommended brands: Hatchbox, eSUN, Polymaker, Bambu

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