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Filament (FDM)

TPU 3D printing

TPU is a thermoplastic elastomer: it prints into flexible parts that return to shape after being deformed. We print it in Brescia with FDM in two hardnesses, 90 and 95 Shore A.

Price band
€€
2 variantsData checked on 13 November 2026
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What it is for

TPU is used for gaskets, bellows, plugs, anti-vibration feet, bumpers, gripper pads and soft guards: parts that have to flex, cushion or seal and then return to shape. It resists abrasion and contact with oils and greases well.

Do not choose it for parts that must stay stiff or accurate under load: an elastomer deforms, and thin walls and overhangs come out less defined than in a rigid material. For complex flexible geometries without supports, consider TPU in SLS or in MJF; for a stiff but tough part, nylon.

Variants compared

TPU: properties of the variants from the makers' data sheets, one column per variant
PropertyTPU 90AQuoteTPU 95AQuote
Mechanical
Tensile strengthISO 3730.1 MPaXY41.4 MPahorizontal specimen
Elongation at breakISO 37592.1%XY563.3%horizontal specimen, at break, the sheet prints it as maximum elongation
Shore hardness90 Shore AISO 7619-192 Shore Astandard not stated on the sheet
Thermal
Heat deflection temperature (HDT) at 1.8 MPaISO 75on request78.6 °C
Vicat softening temperatureISO 306, Vicat Aon request101.6 °C
Physical
DensityISO 11831.21 g/cm³at 23 °C1.25 g/cm³
Water absorptionequilibrium at 23 °C and 70% RH0.67%standard not stated on the sheeton request
Source
  • Polymaker, PolyFlex™ TPU90, V5.5, PDFread on 13 November 2026
  • Filament maker's data sheet, Version: 1.0, Last update: 29-05-2025, PDFread on 13 November 2026

Typical values from the makers' data sheets, measured on specimens under the conditions stated. They are not guaranteed design values: for a critical application ask us for a test on your part.

Design limits

Build volume
350 × 350 × 450 mm
Minimum wall
3 mm
Dimensional tolerance
±0.6 mm up to 100 mm, ±0.75% above

These are the limits of the process, the same for every variant unless stated. For critical dimensions, talk to us before printing.

Which variant to choose

  • TPU 90A: the softer of the two, for gaskets and parts that have to compress. On the sheet's printed specimens: tensile strength 30.1 MPa and elongation at break 592.1% in XY (ISO 37), hardness 90 Shore A (ISO 7619-1).
  • TPU 95A: firmer, for bumpers, wheels, guards and parts that must flex without sagging. On specimens printed flat: tensile strength 41.4 MPa and maximum elongation 563.3% (ISO 37).

Data sheets

  • Polymaker, PolyFlex™ TPU90, V5.5, PDFread on 13 November 2026

    Columns: TPU 90A

  • Filament maker's data sheet, Version: 1.0, Last update: 29-05-2025, PDFread on 13 November 2026

    Columns: TPU 95A

FAQ

Frequently asked questions

The number is the Shore A hardness: the higher it is, the firmer the material. 90A compresses and seals more easily; 95A holds its shape better and prints with sharper walls. Wall thickness and infill change how much the part yields as much as the hardness of the material does.

TPU is used in contact with oils and greases and resists abrasion well. Outdoors it copes with rain and cold; long exposure to the sun can yellow and harden it over time. If the part works with a specific fluid, state it in your request.

For TPU 95A the data sheet reports a heat deflection temperature of 78.6 °C at 1.8 MPa (ISO 75). For TPU 90A the sheet does not give this figure. In general a TPU loses firmness as it warms up: for flexible parts near heat sources, tell us the working conditions.

We issue no declaration of suitability for skin or food contact on printed parts. For grips, straps or guards that are worn, write to us before asking for a quote: we will tell you what we can and cannot do.

Do you have a part to print in TPU?

Upload the CAD file: we reply within 1 working day with a quote and a recommended material.

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