Formlabs Elastic 50A Resin Cartridge

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Formlabs Elastic 50A Resin


Formlabs Elastic 50A Resin is our softest Engineering Resin, making it ideal for prototyping parts normally produced with silicone. Choose Formlabs Elastic 50A Resin for parts that will bend, stretch, compress and hold up to repeated cycles without tearing - and spring back quickly to their original shape. Elastic 50A Resin is also excellent for producing durable fixtures that snap together but can be removed when necessary.

Available for Form 3 generation printers, and Form 2.
Supports print resolutions: 100 microns.
Post-curing required.
Requires Resin Tank LT for Form 2.
Requires Form 3 Resin Tank V2 for Form 3/3B.  Elastic Resin decreases the lifetime of resin tanks. Read more about Resin Tank LT lifetime and Form 3 Resin Tank lifetime. Notice: Form 3 Resin Tank V1 is incompatible with Rigid, Grey Pro, Elastic, and Tough 2000 Resins. Read more about tank versions, lifetime, and maintenance in our support article.


Why Choose Formlabs Elastic 50A Resin?

Elastic 50A Resin is an elastomeric material with high elongation and high energy return. Parts are highly elastic, yet strong enough not to tear during printing.

Fast Springback

  • Bend, stretch, and compress parts that resume their normal shape afterwards.


  • Create objects that are clear, providing visibility into the model.

High Tear Strength

  • Able to withstand rugged use for multiple cycles.


  • Produce parts that look and feel like a molded silicone part.



Formlabs Elastic 50A Resin is ideal for developing soft, flexible prototypes normally produced with silicone.

Consider Elastic 50A Resin for:

  • Wearables, such as straps
  • Compressible buttons
  • Stretchable enclosures and casings
  • Compliant features for robotics
  • Soft tissue anatomy and medical models
  • Special effects props and models

Material Properties*

Elastic 50A Resin

Ultimate Tensile Strength

3.23 MPa

Stress at 50% Elongation

0.94 MPa

Stress at 100% Elongation

1.59 MPa



Tear Strength

19.1 kN/m

Hardness Shore A



Form Wash Settings


10 minutes + 10 minutes


Wash Formlabs Elastic 50A Resin for 10 minutes on the build platform. Remove parts from the build platform, then wash for 10 more minutes using fresh solvent. Avoid washing Elastic 50A Resin for longer than 20 minutes, as this may degrade parts.

Form Cure Settings


20 min


60 °C


For parts printed in an engineering-focused resin (such as those in the Rigid, Tough & Durable, and Flexible & Elastic families), post-curing ensures that the parts reach their optimal mechanical properties and can function as designed. There is only one recommended post-curing time for Elastic 50A Resin.


Printer compatibility: Form 2, Form 3, Form 3B, Form 3L, Form 3BL, Form 3+, Form 3B+

Compatible with these resin tanks: Form 2 LT Tank, Form 3/3B Resin Tank V2, Form 3/3B Resin Tank V2.1, Form 3L/3BL Resin Tank V1

Compatible with these build platforms: Form 3 Build Platform 2

Note: Print settings for this material may not be available yet on Form 3L and Form 3BL printers. Please visit our support page for more information.

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