Cheapest TPU (Flexible) Filament Right Now

Shore A hardness determines how flexible your prints will be. Lower numbers = softer and more rubber-like.

95A is the right floor for phone cases. Soft enough to slide on without breaking the case, firm enough to print cleanly without buckling. Any of the budget 95A picks (Elegoo, SUNLU, GEEETECH) work fine. Print at 0.16-0.20mm layers and 25-30% gyroid infill for the right balance of flex and impact absorption.

Below 95A (90A, 85A) cases feel rubbery and don't snap onto the phone reliably. Above 95A (98A) the case prints faster but cracks under impact like a rigid case would. 95A is the well-tuned default.

For genuinely rubber-like seal-against-pressure parts, you need 85A-90A. The compression set is what matters, how much the material returns to shape after being squeezed. 95A doesn't compress enough to seal; 85A does. Polymaker PolyFlex TPU90 is the most-mentioned for engineering gaskets. NinjaFlex 85A for medical-adjacent or prosthetic applications.

These are direct-drive only. Print at 15-20 mm/s with retraction reduced to 0.5-1mm or disabled. Expect to dry the spool before every print, since soft TPU absorbs moisture faster than 95A.

For impact absorption, 90A-95A is the sweet spot. RC tires are typically printed at 95A for grip without sidewall collapse. Drone landing gear at 90A for cushioning crash impact. Engine-mount vibration dampeners at 90A. Print these solid (100% infill) for predictable damping behavior, because gyroid infill changes how the part absorbs vibration.

For RC drift tires, some makers go to 85A for grip. For RC race tires, 95A holds up to centripetal force better. Carbon-fibre filament guide covers RC frame material choice.

Tool grips, screwdriver handles, kitchen utensil grips, prosthetic socket interfaces all want 85A-90A for genuine soft-touch feel. NinjaFlex 85A is the original here; SainSmart and Polymaker have caught up at lower prices. Print these slow (15 mm/s), with a brim, and tolerate visible layer lines, which are masked by the rubbery surface.

For tool grips that need to grip wet hands, 85A is mandatory; 95A feels plasticky. For dry-grip tools, 90A is firmer and easier to print.

Bambu printers handle TPU well on direct-drive feed but DON'T put TPU through the AMS. Even Bambu recommends external spool feed for TPU because the AMS path has too many bends for soft filament. The H2D's direct-drive Hurricane extruder is the fastest TPU printer in the Bambu lineup. Use the Generic TPU profile for budget brands; switch to Bambu TPU HF profile only when running Bambu's own TPU.

Don't try multi-color TPU prints with the AMS. The 4-spool path can't handle the back-and-forth bending. Single-spool TPU is the only reliable Bambu TPU workflow.

Prusa direct-drive setups handle 90A-98A TPU cleanly out of the box. The Prusament TPU 95A profile is well-tuned and works for any decent 95A. For 85A-90A, drop print speed to 15 mm/s and reduce retraction to 0.5mm. The Prusa Mini's smaller direct-drive extruder is more sensitive to soft TPU than the MK4S; keep to 95A on the Mini for reliability.

Prusa enclosure isn't sealed and TPU absorbs humidity fast, so a dry box for the active spool pays for itself if you print TPU regularly.

Stock Bowden Enders can print 95A TPU very slowly (15 mm/s) with retraction disabled. Below 95A, the soft filament buckles in the PTFE tube and jams the extruder. The fix is a direct-drive conversion kit ($30-60); Creality Sprite, Microswiss NG, or BIQU H2 are common picks. Once on direct drive, any TPU prints fine.

If a direct-drive upgrade isn't an option: 95A only, very short Bowden tube, no retraction, 15 mm/s max. Even then, expect occasional jams. TPU isn't really a Bowden material.

Voron Stealthburner with a tuned input shaping and pressure advance is the best TPU printer in this category. The Galileo and LGX Lite extruders both feed TPU cleanly down to 85A. With pressure advance dialled (typically 0.06-0.10 for TPU vs 0.04 for PETG), even standard TPU runs at 50-60 mm/s on a Voron.

For multi-material TPU on Voron with ERCF, plan for problems, because soft filament deforms under cutter pressure. Keep TPU on a dedicated single-extruder setup if you can.

The most common TPU failure on Bowden printers and on direct-drive printers feeding soft (<95A) TPU. The filament compresses under the extruder gear and buckles into a coil instead of feeding into the hotend. Fixes: switch to direct drive, switch to 95A, slow down to 15 mm/s, or all three. There is no software fix; it's a mechanical problem.

If you see buckling on a direct-drive printer with 95A TPU, check that the filament path between the spool and extruder is unobstructed. Any sharp bend or tight clip can cause the same buckling.

Some stringing is normal with TPU. Heavy stringing (webbing across travel moves, blobs everywhere) is wet filament. Dry the spool at 50°C for 4-6 hours; vacuum-bag with desiccant between prints. TPU absorbs moisture faster than any other common filament, so a 1kg spool can go from dry to soaking in two weeks of humid storage.

If drying doesn't fix it: drop print temp 5°C, increase travel speed to 200+ mm/s, and reduce retraction to 0.5-1mm (or disable on Bowden). Don't expect zero stringing; some webbing is inherent to TPU.

The most-overlooked failure: printing the wrong Shore hardness for the application. A 95A phone case feels plasticky if the user expects soft-touch feel; an 85A drone leg collapses on landing. Match Shore to use case before troubleshooting print quality. The Shore reference table at the top of this page maps hardness to use case.

If the print is mechanically right but feels wrong, the answer is a different filament Shore, not different print settings.

TPU can bond aggressively to bed surfaces, especially smooth PEI and glass. Fix: textured PEI releases TPU cleanly once the bed cools. On smooth PEI or glass, use glue stick or painter's tape as a release layer. Don't try to pull a hot TPU print, because the soft polymer will deform and tear before releasing. Wait for the bed to cool to room temp.

If a print is genuinely stuck, run the bed through a heat-then-cool cycle (heat to 60°C, then turn off and wait). The thermal contraction breaks the bond.

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Prices shown are pulled directly from retailer feeds and updated every 24 hours. Market comparison percentages show how each product compares to the median price for its material type. This helps you spot genuinely good deals vs. inflated "sale" pricing.