Polymaker TPU Filament 1.75mm Grey 0.75kg - Flexible TPU90

In this review of Polymaker PolyFlex TPU90 filament the bottom line is simple: it is aimed at makers who need a reliable, slightly firm flexible filament that prints cleanly on most desktop FDM/FFF printers. The single biggest reason to buy is its combination of high print speed compatibility and UV resistance, which makes it useful for both indoor wearable parts and outdoor components. The spool arrives dried and vacuum-sealed, and prints best when you follow the specified temperatures and moderate speeds.

Key Features

• Shore 90A flexibility: Provides a tough, rubbery feel that holds shape while still offering useful elasticity for parts like gaskets and watch bands.
• Easy to print: Compatible with most desktop FDM/FFF printers without hardware modification and runs well at recommended nozzle temperatures.
• UV resistant: Suitable for outdoor-use parts where color stability and material performance matter over time.
• Tangle and moisture protection: Dried, vacuum-sealed spool with desiccant and a resealable bag reduces moisture issues and tangles during storage.
• Outstanding layer adhesion: Delivers consistent, bubble-free and warp-free prints when correct settings are used.
• Wide application range: Works for seals, shoe insoles, phone cases, drone parts and other wearables or protections.

Who It's For

This filament suits hobbyists and small shops that need a flexible TPU that is not overly soft but still resilient, for example producing keyring cases, gaskets, shoe insoles, or protective device components. It is particularly good for users who value UV resistance for parts that may see sun exposure.

Those who require extremely soft elastomers or shore hardness below 90A should look elsewhere, as this material reads as firm to some users. Also, users who need rigid engineering plastics or very high-temperature materials will need a different filament type.

Pros & Cons

Pros

• Excellent balance of flexibility and strength for wearable and protective parts.
• Prints cleanly on many desktop FDM/FFF printers with recommended settings, reducing jams and bubbles.
• Vacuum-sealed, dried spool with desiccant and secure tip reduces tangles and moisture-related print issues.
• UV resistance extends use to outdoor applications without rapid color or property loss.

Cons

• Perceived stiffness varies: some users report it feels firmer than expected, so it may not suit projects needing very soft TPU.
• Adhesion to itself can be mixed on some printers unless temperature and speed are tuned carefully.

Specifications

Our Verdict

Polymaker PolyFlex TPU90 is a dependable choice for makers needing a firmer flexible filament that prints reliably on standard FDM/FFF machines. Its UV resistance, careful packaging, and consistent layer adhesion make it good value for projects like gaskets, protective cases and wearable parts, provided you accept a slightly firmer feel than softer TPU options.

Frequently Asked Questions

Will this filament work on my desktop FDM printer?
Yes; it is designed to be compatible with nearly all desktop FDM/FFF printers and does not require hardware modifications.

How should I store the filament to avoid moisture?
Keep the spool in the resealable vacuum bag with the desiccant after opening and secure the filament tip to prevent nodes and tangles.

What printing settings give the best results?
Use a nozzle temperature between 210 C and 230 C, bed temperature 25 C to 60 C, printing speed 30mm/s to 60mm/s, and run the part cooling fan on.