When to choose TPU
TPU is the right pick when the part must flex, compress, or grip. Phone cases, shoe insoles, gaskets, O-rings, vibration dampers, drone battery straps, tool grips, medical wearables (bracelets, straps), dust covers that need a snug seal, and any squishy functional part.
When to pick something else
Skip TPU for rigid structural parts — you're paying more for less strength. Skip for parts that need a crisp, sharp aesthetic. Skip for high-temp applications (keep under 60°C sustained). Our lead time on TPU is typically 1 day longer than rigid jobs because of the slow print speed.
TPU Properties & Datasheet
Verified against manufacturer datasheets and our own print testing at the San Diego shop.
| Tensile strength | 26 MPa | Lower than rigid filaments — you're paying for flex |
| Shore hardness | 95A (common) | Feels like a pencil eraser |
| Heat deflection | 60 °C | Keep below that for load-bearing |
| Elongation at break | 450% | Huge stretch before rupture |
| Chemical resistance | Excellent | Oils, greases, most solvents |
| Abrasion resistance | Excellent | Outperforms most rigid plastics |
| Print speed | Slow (30mm/s typical) | Flexible filament takes time; it shows in lead time |
| Layer adhesion | Good | But layer lines are visible |
DESIGN TIPS
Designing for TPU
- 01Walls: TPU parts compress, so design for the compressed dimension if you need a seal.
- 02Infill: 25–50% for cushioning. 100% only if you need a solid rubber block (expensive).
- 03Supports: we avoid them when possible; TPU supports are brutal to remove.
- 04Shore hardness matters — we stock 95A (firm) by default; softer 85A on request.
- 05Holes tighten in TPU — design 0.3mm oversized for snug fits.
CUSTOMER WORK
Real parts we've printed in TPU
Drone battery strap
95A TPU strap for a 5" freestyle drone — absorbs vibration and doesn't snap in freezing temps.
Industrial gasket
Custom-shaped TPU gasket for a pump flange — outperformed off-the-shelf O-rings.
Phone case
Drop-tested custom case for a one-off phone model not on retail shelves.
Considering alternatives?
TPU FAQ
How much does TPU 3D printing cost?+
What is TPU best for?+
When should I NOT use TPU?+
What does TAKT 3D's TPU print setup require?+
How long is TPU 3D printing turnaround?+
Ready to print in TPU?
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