The Best Flexible Materials in 3D Printing

The world of additive manufacturing has witnessed a tremendous shift with the advent of flexible materials in 3D printing. Unlike traditional rigid components, these malleable substances have unlocked many possibilities, catering to unique requirements in diverse fields. The evolution of 3D printing materials now includes options that aren’t just strong but also flexible, enabling designs previously considered unattainable.
The Best Flexible Material in 3D Printing

Whether crafting 3D printed parts for wearables or creating shock-absorbent elements, the importance of flexible 3D printing material cannot be understated. As we explore this transformative landscape, we’ll delve into the significance of flexible materials in 3D printing and its pivotal role in modern manufacturing.

Why Flexibility Matters in 3D Printing

In additive manufacturing, the demand for flexible filaments in 3D printing has surged, and for good reason. Firstly, these materials offer distinct advantages over their rigid counterparts. Their flexibility allows for creating objects that can withstand external pressures, bend without breaking, and revert to their original form post-deformation, showcasing strength and elasticity.

Moreover, the breadth of applications for flexible filament is vast and continually expanding. Wearable technology, for instance, requires durable and adaptable components to the wearer’s movements. Flexible materials rise to this challenge, providing comfort alongside functionality. In soft robotics, the need for components that mimic organic movement is paramount, and here again, flexible 3D printing shines. Whether designing lifelike prosthetics or pioneering types of 3D printing that cater to the automotive sector, emphasizing the plastics in the automotive industry, the versatility of flexible materials remains unmatched in unlocking innovative solutions.

Top Flexible Materials Used in 3D Printing

As the horizon of additive manufacturing expands, many flexible 3D printing materials have emerged, each boasting unique properties suited for various applications. Let’s delve into some of the frontrunners in this domain:

Thermoplastic Elastomers (TPE)

TPE material

Renowned for their elasticity and versatility, TPEs stand out in 3D printing flexible filaments. They combine the best plastics and rubbers, offering a soft yet durable finish. Brands like Ninjaflex and FlexiFil have popularized TPEs, catering to applications ranging from footwear soles to protective cases, benefiting from their exceptional shock absorption and resilience.

Thermoplastic Polyurethane (TPU)

tpu material

TPU has cemented its place in the flexible 3D printing arena due to its superior wear and tear resistance. While it shares some similarities with TPE, TPU boasts better abrasion resistance and transparency. Its ability to withstand oils and chemicals further accentuates its demand in industrial and automotive applications, distinguishing it from other elastomers.

Polyethylene (PE)

PE material

With its low friction coefficient and high ductility, PE is increasingly becoming the material of choice for flexible 3D printing. Its inherent strength and resistance to moisture make it suitable for outdoor applications, protective gear, and packaging. As 3D printing technology advances, PE’s attributes, like recyclability and UV resistance, further boost its preference for sustainable projects.


FlexPLA material

FlexPLA, a blend of PLA (Polylactic Acid) and a flexible component, balances rigidity and flexibility. While it retains the ease of printing akin to regular PLA, its flexibility is enhanced, making it suitable for applications requiring a strong flexible material with a slight give. Ensuring optimal bed temperatures and controlled print speeds are recommended to achieve the best FlexPLA results.

Silicone Materials

Silicone material

Traditionally recognized for its suppleness and biocompatibility, silicone has recently made waves in the flexible 3D printing landscape. With advancements in printing techniques, it’s now possible to craft detailed and intricate designs using silicone. Its hypoallergenic nature is ideal for medical implants, prosthetics, and cosmetic applications. Furthermore, with resistance to high temperatures and chemicals, silicone-based materials are expanding their footprint in many industries.

Tips for 3D Printing with Flexible Filaments 

Navigating the world of flexible 3D printing requires a blend of knowledge and precision. Ensuring the end product is top-notch quality demands meticulous attention to printer settings and post-processing.

Printer Settings and Calibration

Optimizing printer settings largely hinges on impeccable results with flexible 3D printing filaments. Calibration is key; a well-aligned printer bed and nozzle can prevent common issues like warping or misprints. Furthermore, adjusting extrusion rates, controlling print speed, and ensuring the correct temperature for the specific material can greatly enhance print quality. Periodic checks and recalibrations are indispensable for consistent outputs.

Post-Processing and Finishing

Once the printing concludes, the journey isn’t over. Post-processing plays a pivotal role in determining the final appearance and texture of 3D printed flexible parts. Techniques such as sanding, vapor smoothing, or using sealants can provide a refined finish. However, being cautious is crucial—over-processing can compromise the material’s inherent flexibility. Being informed and prudent in post-processing will ensure your designs retain aesthetics and function.


What are the main challenges in 3D printing with flexible materials?

The primary challenges include potential stringing, oozing, bed adhesion issues, and the need for precise calibration to maintain material integrity throughout the print process.

How does TPU differ from regular PLA or ABS in 3D printing?

TPU is more flexible and durable than PLA and ABS. While PLA and ABS are rigid, TPU combines elasticity with resistance to abrasion, oils, and chemicals.

Can all 3D printers handle flexible materials?

Not all. While many modern 3D printers can, ensuring the printer’s extruder and feed system are compatible with the chosen flexible material is essential.

How do flexible filaments fare in terms of durability and longevity?

Flexible materials typically exhibit high durability resistance to wear and tear and can maintain their properties over time, especially if used within their recommended conditions.

What are some popular brands for flexible 3D printing materials?

Popular brands include Ninjaflex, FlexiFil, SainSmart, and MatterHackers’ PRO Series Flex, each offering a range of options tailored to specific applications and printer compatibilities.


In the ever-evolving landscape of additive manufacturing, the significance of flexible materials in 3D printing has undeniably carved its niche. From their unparalleled versatility in diverse applications to their intrinsic blend of strength and elasticity, these materials are revolutionizing how we perceive and create.

As we’ve navigated the spectrum of available materials and best practices, one thing remains clear: the potential is vast, limited only by imagination. To our avid readers and budding innovators, we encourage you to dive deep, experiment, and push the boundaries. The world of flexible 3D printing awaits your ingenuity and vision. Embrace the flexibility, and let creativity flow!

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