Formlabs Flexible 80A Resin (Form 4)

A stiff, soft-touch, translucent elastomer resin with an 80A Shore durometer — ideal for prototyping rubber-like parts that need to bend, flex, and compress while holding shape through repeated cycles.

Formlabs Flexible 80A Resin (Form 4) cartridge
Category: Engineering
Technology: SLA
Durometer: 80A (Shore A)
Look: Translucent
Best for: TPU-like prototypes

Important: Flexible materials are sensitive to post-processing. Follow the validated wash + post-cure workflow in the manufacturer documentation to achieve intended flexibility and durability.

Hard-flexible parts with a soft-touch feel — built for repeated use

Formlabs Flexible 80A Resin is the stiffest soft-touch material in the Flexible/Elastic family, designed to simulate the flexibility of harder rubber or TPU. It’s ideal when you need tactile parts that flex under load, then return reliably to shape.

Use it to prototype cushioning, damping, and shock-absorbing features — or to produce soft-contact components like grips, seals, and protective interfaces without tooling.

Authorised Formlabs Reseller
Optimised for: Durable flexible prototypes

Why Choose Formlabs Flexible 80A Resin?

Stiff-Soft Balance (80A)

A “hard flexible” feel — more supportive than soft elastomers, great for TPU-like prototypes that still compress.

Repeatable Flex & Compression

Designed to withstand bending, flexing, and compression through repeated cycles for functional testing.

Soft-Touch, Translucent Finish

Produces tactile parts for grip, comfort, contact, and ergonomic interfaces with a clean translucent appearance.

Iterate Without Tooling

Dial in fit, stiffness, and geometry quickly — ideal for design sprints and low-volume custom parts.

Applications

Flexible 80A Resin is built for parts that need a soft interface while remaining supportive and durable.

Consider Flexible 80A Resin for:

  • Handles, grips, overmolds, bumpers, protective interfaces
  • Seals, gaskets, masks and compressible contact surfaces
  • Cushioning, damping, shock absorption features
  • Wearables and soft-touch prototypes (comfort + support)

Need softer? If you want more stretch and a softer feel, step down to a lower-durometer elastomer (e.g., 50A-class materials).

Material Properties

Property Typical Value
Ultimate Tensile Strength 8.9 MPa
Stress at 50% Elongation 3.1 MPa
Stress at 100% Elongation 6.3 MPa
Elongation at Break 120%
Tear Strength 24 kN/m
Hardness 80A (Shore A)

*Note: Properties vary with geometry, orientation, settings, and post-processing. Use the manufacturer documentation for validated conditions.

Workflow Overview

Flexible 80A Resin follows a standard print + wash + post-cure workflow. For consistent flexibility and tear strength, use the validated wash and cure settings in the documentation.

  • Print using the Flexible 80A Resin preset for your Form 4 printer.
  • Wash per the validated method and timings (avoid over-washing flexible parts).
  • Post-cure per the validated cycle to reach intended mechanical performance.
  • Finish (support removal, light trim) while preserving critical contact surfaces.

(70831)

SKU 70831
Brand Formlabs

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