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Prusament TPU 95A

Ref.: PRUSA-TPU-95A-NAT-175-500

32.22 €

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Approximate delivery date: Wednesday 10 December - Tuesday 16 December

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The TPU 95A filament from Prusa Research for FDM 3D printing is the ideal solution for those looking to print flexible, resistant, and highly dimensionally accurate parts. Thanks to its advanced formulation based on ether diol polymers, this flexible filament for 3D printers clearly differentiates itself from standard TPU (ester diol type), offering superior advantages in mechanical resistance, thermal stability, and chemical durability.

Designed for demanding applications, TPU 95A is perfect for manufacturing components such as cable protectors, impact-resistant covers, durable grips, flexible tires, parts for sports equipment, and industrial models that require flexible material with high wear resistance. Its elastic behavior is maintained even at extreme sub-zero temperatures (up to -50 °C), making it one of the best flexible filaments for 3D printing available on the market.

Video 1: How Prusa3D filaments are produced.

In addition to its excellent impact and abrasion resistance, this TPU 95A filament stands out for its very low moisture absorption, which improves dimensional stability and prevents common problems during printing. It also offers high resistance to hydrolysis, microbial degradation, and chemical agents such as oils and greases, making it ideal for high-performance technical 3D prints in industrial or outdoor environments.

Thanks to its precise and constant diameter, this filament ensures uniform feeding in the printer, significantly reducing failures due to jams or stringing. It offers very good results in printing bridges and overhangs, which is unusual for TPU materials. Although its printing speed is slower and may require prior adjustments depending on the type of 3D printer, its technical benefits largely compensate for these demands.

Sharp edge protectors made with TPU 95A, a very wear-resistant material, ideal for covering skis, skates, and other similar equipment.

Photo 1: Sharp edge protectors made with TPU 95A, a very wear-resistant material, ideal for covering skis, skates, and other similar equipment. Source: Prusa3D

Pros and Cons of TPU 95A Filament

The TPU 95A filament for 3D printers is characterized by its versatility and technical performance. Like any specialized material, it presents advantages and considerations that must be evaluated before its use in 3D printing projects. Below is a detailed comparison of the main benefits and limitations of this high-resistance flexible filament.

Advantages	Disadvantages
✅ High flexibility and impact resistance even at -50 °C	❌ May require print adjustments depending on the 3D printer model
✅ Excellent wear and abrasion resistance	❌ Requires separation layer when using smooth sheets
✅ Very low moisture absorption	❌ May require pre-drying if stored in humid environments
✅ Guaranteed dimensional accuracy and high printing reliability	❌ Large parts may show slight deformation (warping)
✅ Chemical resistance to oils, greases, and external agents	❌ Difficult post-processing and solubility
✅ Superior performance in bridges and overhangs compared to other TPUs	❌ Slower printing speed than rigid filaments

Photo 2: High-resistance cable protectors printed with TPU 95A. Source: Prusa3D

Technical Characteristics of TPU 95A

The TPU 95A from Prusa3D has technical specifications that make it ideal for multiple industrial and functional applications. Its behavior against humidity, abrasion, temperature, and chemical agents positions it as one of the most complete flexible filaments on the market. Below are the most relevant physical, mechanical, and thermal properties of this material.

Property	Value/Description
Filament type	TPU (thermoplastic polyurethane)
Shore Hardness	95A
Elasticity Level	High
Impact Resistance	High
Heat Deflection Temperature	78.6 °C at 1.80 MPa
Printing Speed	Slow
Diameter Accuracy	±0.06 mm
Moisture Behavior	Very low absorption
Chemical Resistance	High (oils, greases, humidity)
Warping Propensity	Medium (only on large parts)
Odor during printing	Almost imperceptible
Post-processing	Difficult
Abrasivity	None
Compatibility with 3D printers	High, especially with Nextruder-type systems

Reasons to choose Prusa3D's flexible TPU 95A filament

This TPU 95A flexible 3D filament is positioned as a high-end option for users seeking a durable material with excellent mechanical performance, allowing the printing of technical parts with professional finishes. Its reliable behavior, even under intensive use conditions, makes it a key choice among filaments for professional 3D printers in July 2025.

For those developing functional parts, industrial prototypes, or high-performance flexible components, TPU 95A represents one of the best flexible filaments for FDM 3D printing in the current market.

Photo 3: Tires printed with Prusament TPU 95A filament. Source: Prusa3D

General information
Material	TPU
Format	500 g
Density	(ISO 1183) 1.25 g/cm³
Filament diameter	1.75 mm
Filament tolerance	0.06 mm
Filament length	166.3 m
Maximum water absorption	(Prusa Polymers in 24 hours) 0.02 %

Printing properties
Printing temperature	230 ºC
Print bed temperature	65 ºC
Cooling fan	30 - 50%
Recommended printing speed	Up to 30 mm/s

Mechanical properties
Tensile strength	(ISO 37) 41.4 MPa
Surface hardness	(Prusa Polymers Shore D) 39
Abrasion resistance	(ISO 4649) 0.21 ºC

Thermal properties
Softening temperature	(ISO 75 1.80 MPa) 78.6 ºC

Tips for Printing with TPU 95A: Configuration and Recommendations for Perfect Results

Printing with TPU 95A flexible filament can be challenging if you don’t have the right setup. This technical filament, highly valued for its wear resistance, flexibility, and durability, requires specific adjustments to the 3D printer and careful preparation of the print surface. Below are the best tips for printing with TPU 95A accurately and efficiently, optimizing each parameter of the 3D printing process.

TPU 95A filament performs optimally in 3D printers equipped with Nextruder-type extruders. Models like the Original Prusa MK4, MK4S, XL, Core One and Prusa Pro HT90 allow for printing with TPU 95A almost without adjustments thanks to the pre-configured profiles available in PrusaSlicer. In the case of earlier 3D printers, like the MK3S+ or older versions, the material is also compatible but may require configuration modifications, such as loosening the extruder roller to ease the feeding of the flexible filament.

During the loading process of TPU filament, resistance may occur when passing the material through the filament sensor or PTFE tube, especially in models like the Prusa XL or Core One. To avoid feeding issues, it is recommended to temporarily disconnect the PTFE tube from the extruder or sensor side, manually insert the filament, and reconnect it once properly loaded. This action prevents clogs and ensures continuous extrusion, which is crucial when printing with flexible materials.

Another key factor for successful printing with TPU 95A is the use of a filament guide, especially on MK4 or MK4S printers. This accessory maintains consistent filament tension during printing, reducing the possibility of erratic retractions and improving process stability. Additionally, if printing with a high-flow nozzle in an enclosed chamber, it is recommended to leave the door open or activate ventilation to prevent excessive heat buildup inside the print chamber.

Bed preparation and the print surface play a decisive role in the quality of the finish. The best sheets for printing with TPU 95A are PA Nylon sheet and satin sheet. Both provide excellent adhesion and stability, as long as they are cleaned properly: water for the PA and isopropyl alcohol (IPA) for the satin sheet. For large-volume 3D prints, it is recommended to apply a “brim” or slightly increase the nozzle and bed temperature to improve first-layer adhesion.

Polypropylene (PP) sheets and textured surfaces can also be used. The PP sheet offers slightly stronger adhesion than the satin one and works well with demanding models. For the textured sheet, the adhesion may be so strong that removing the model could become difficult. In such cases, it is suggested to heat the surface to 40°C and use a spatula to ease removal without damaging the piece. On the other hand, using smooth PEI sheets is not recommended due to excessive adhesion, which could damage the sheet when removing the model. If no other option is available, a separating layer with glue stick should be applied to avoid this issue.

One of the technical advantages of TPU 95A is its very low moisture absorption. However, if the filament has been exposed to humid environments or improperly stored, it can absorb moisture and cause printing defects like stringing or bubbles. In such cases, it is recommended to dry the filament for 4 hours at 60°C before printing. To maintain its ideal state, it should be stored in a dry box with silica gel or in a container with humidity control.

The ideal thermal setup for printing with TPU 95A is an extrusion temperature of 230±10°C and a heated bed temperature of 65±10°C. These values ensure good material fusion, proper layer adhesion, and a good surface finish, even for flexible parts that require high mechanical strength. Correctly adjusting these parameters is essential for ensuring a successful 3D print with flexible TPU filament.

By following these printing recommendations for TPU 95A, you will achieve functional parts with excellent durability, high elasticity, and dimensional accuracy. These features make it one of the best flexible filaments for 3D printing, ideal for technical applications, protective covers, shock absorbers, impact-resistant parts, and models requiring extreme wear resistance.