Polymaker PolyFlex TPU90 1.75mm White 0.75kg - Flexible TPU Filament

In this review of the Polymaker PolyFlex TPU90 filament, the bottom line is simple: it is a reliable, moderately firm TPU that suits makers who need durable, UV-resistant flexible parts without changing printer hardware. The reviewer found it most valuable for functional parts like gaskets, phone cases and wearable items because of its combination of toughness, shape memory and consistent spool handling. For hobbyists who require easy, jam-free printing on standard FDM/FFF machines, this PolyFlex TPU90 performs well and prints at reasonably fast speeds.

Key Features

• Shore 90A hardness: provides a sturdy rubbery feel that holds shape while still offering useful flexibility for functional parts.
• UV resistant: suitable for outdoor use so printed parts retain properties and color when exposed to sunlight.
• Ready-to-print spool packaging: dried, vacuum-sealed in a resealable bag with desiccant to reduce moisture-related printing issues.
• Tangle-minimised winding: carefully wound and includes side spool holes to help prevent tangles and feeding problems during long prints.
• Wide printer compatibility: prints on nearly all desktop FDM/FFF printers without hardware modifications, making it easy to adopt for most setups.
• Strong layer adhesion: delivers consistent, bubble-free and warp-resistant layers when using recommended settings.

Who It's For

This filament is a good match for makers and small shops printing functional flexible parts such as seals, gaskets, shoe insoles, watch bands, phone cases and light-duty bike components. Users who value UV resistance and a firmer TPU will appreciate the balance of flexibility and durability offered by the 90A shore rating.

It is less suited to projects that demand extremely soft elastomers or highly stretchable rubbery parts where a lower shore hardness is required. Novice users should be prepared to tune extrusion temperature and print speed to avoid stringing and ensure consistent adhesion.

Pros & Cons

Pros

• Excellent print quality and consistent extrusion when run at recommended settings.
• Durable and UV-resistant for outdoor or wearable applications.
• Carefully packaged to stay dry and wound to minimise tangles for trouble-free feeding.

Cons

• Some users report mixed self-adhesion or find the material stiffer than expected for very soft applications.

Specifications

Material	Thermoplastic polyurethane (TPU)
Diameter	1.75mm
Weight	0.75kg
Shore Hardness	90A
Recommended nozzle temp	210 C - 230 C
Recommended bed temp	25 C - 60 C
Printing speed	30mm/s - 60mm/s

Our Verdict

The PolyFlex TPU90 1.75mm is a dependable, slightly firm TPU filament that offers good value for anyone printing functional flexible parts on standard FDM/FFF printers. With UV resistance, careful spool packaging and solid layer adhesion, it is a practical choice for wearable items, gaskets and outdoor components, provided you accept its firmer feel compared with softer elastomers.

Frequently Asked Questions

What temperatures should I print this TPU at?
Print between 210 C and 230 C with a bed temperature from 25 C to 60 C for best results.

Will this filament work on my desktop FDM printer?
Yes, it is compatible with nearly all desktop FDM/FFF printers and normally requires no hardware modifications.

How is the spool packaged to prevent moisture?
The filament is dried, vacuum-sealed in a resealable ziplock bag with a desiccant and wound to reduce tangles.