Formlabs Silicone 40A Resin Cartridge

Product Summary
  • Rapid prototyping, beta testing, and validation stages of the product development cycle for elastic consumer goods, automotive components, and industrial equipment such as connectors, grommets, actuators, keypads, and watch bands.
  • Cost-efficient low-volume or custom manufacturing of indoor end-use parts, such as seals and gaskets.
  • High-quality, long-lasting custom manufacturing aids and tools such as flexible casting molds, jigs, fixtures, and masking tooling.
  • Medical device components, patient-matched prosthetics, and audiology applications.
  • Complex geometry parts that are difficult to manufacture with traditional methods.

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Formlabs Silicone 40A Resin Cartridge

Introducing Formlabs Silicone 40A Resin - the first accessible 100% silicone 3D printing resin. This revolutionary product eliminates molding and labor-intensive casting processes, allowing you to 3D print pure silicone parts in-house in a matter of hours! With our patent-pending Pure Silicone Technology™, you can create complex shapes with ease that would otherwise be impossible or too costly to produce using traditional methods. Get your hands on this groundbreaking technology today and take your projects to the next level!

The Formlabs Silicone 40A Resin is the perfect material for fabricating soft, pliable, and durable parts. With a 230% elongation at break and 12 kN/m tear strength, this resin can withstand repeated cycles of stretching, flexing, and compression. It has a Shore durometer rating of 40A which makes it ideal for applications that require flexibility such as gaskets or seals.

This high-performance silicone is also resistant to UV light, ozone exposure, and extreme temperatures making it suitable for outdoor use.  Combine the high performance of silicone and the design freedom of 3D printing to create highly functional silicone parts with excellent chemical and thermal resistance (-25°C to 125°C), fine features as small as 0.3 mm, and complex geometries that are not possible with traditional methods.

Why Choose Formlabs Silicone 40A Resin

  • The First Accessible 100% Silicone 3D Printing Material

Silicone 40A Resin is a pure silicone, without added monomer or acrylate, enabled by Formlabs’ new patent-pending Pure Silicone Technology™. Silicone 40A Resin combines the superior material properties of cast silicone with the benefits of 3D printing.

  • Outstanding Elastomeric Performance

Fabricate soft, pliable, and durable parts with a 230% elongation at break and a 12 kN/m tear strength that can withstand repeated cycles of stretching, flexing, and compression. Produce highly functional silicone parts with excellent chemical resistance and thermal stability (-25°C to 125°C).

  • Cost-Effective Rapid Prototyping and Low Volume Manufacturing

Eliminate tooling and labor-intensive casting processes to enable custom and low-volume manufacturing of silicone parts.

  • Newfound Design Freedom

Create customized silicone parts with isotropic properties, fine features as small as 0.3 mm, and complex geometries that aren’t possible with casting or molding.

  • Fast and Easy Fabrication

Benefit from the streamlined Formlabs SLA ecosystem to produce pure silicone parts in-house, in a matter of hours.



Silicone 40A Resin is a cost and time-effective solution for fabricating functional prototypes, validation units, tooling, and small batches of silicone parts. Parts printed in Silicone 40A Resin are soft, durable, with excellent elasticity, chemical resistance, and thermal stability. They are used in industries such as consumer goods, automotive, robotics, manufacturing, and healthcare.

Consider Silicone 40A Resin for:

  • Seals, gaskets, grommets, connectors, and dampeners for automotive, robotics, and manufacturing.
  • Wearables, handles, and grippers for consumer products.
  • Customized prosthetics, orthotics, audiology models, and medical devices.
  • Flexible fixtures, masking tools, and soft molds for casting urethane or resin.


Form Wash Settings


20 min 


Use Form Wash filled with 8 L of IPA and 2 L of n-Butyl Acetate. After washing, dry the parts for a minimum of 60 minutes.

Form Cure Settings


30 min


60 °C


Fully submerge the dry parts in water in a glass beaker placed inside Form Cure.

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