Formlabs Durable Resin (Form 4)

A pliable, impact-resistant engineering resin for squeezable parts and low-friction assemblies — ideal when you want polyethylene-like feel and durability with a smooth, production-ready surface.

Formlabs Durable Resin (Form 4) cartridge
Application: Engineering / Prototyping
Technology: SLA
Feel: Pliable + tough
Best for: Low friction + impact
Layer heights: 50–100 µm

Note: Durable Resin performance depends on proper wash + post-cure. Use the validated Formlabs workflow for best results.

Pliable, impact-resistant parts with smooth motion and low wear

Formlabs Durable Resin is designed for functional prototypes that need to bend, flex, and recover — while staying tough under knocks and repeated handling. It’s a go-to material for squeezable prototypes, low-friction assemblies, and jigs & fixtures that see real-world impacts.

Printed parts have low friction, with a feel comparable to polyethylene-like strength and stiffness and friction comparable to Delrin® (POM) — great for sliding features, snap-fits, and non-marring contact surfaces.

Authorised Formlabs Reseller
Material family: Tough & Durable

Why Choose Formlabs Durable Resin?

Pliable + Impact-Resistant

Designed for parts that flex and absorb bumps — great for functional prototypes, protective features, and fixtures that take knocks.

Low Friction, Low Wear

Ideal for sliding contact and moving features — including low-friction assemblies and non-marring surfaces.

Polyethylene-Like Behaviour

A great option when you want a polyethylene-like balance of toughness and pliability without switching to molded prototypes.

Clean, Reliable SLA Workflow

Print fine features and functional geometry, then wash + post-cure for repeatable, high-performance parts.

Applications

Durable Resin is the most pliable material in the Tough & Durable family — a strong fit for parts that must be squeezed, snapped, or slide smoothly without binding.

Consider Durable Resin for:

  • Squeezable prototypes (grips, compliant housings, ergonomic features)
  • Low-friction assemblies (slides, guides, wear pads, bushings, contact surfaces)
  • Impact-resistant jigs & fixtures (tooling that takes repeated knocks)
  • Non-marring surfaces (parts that touch finished components)

Recommended layer heights: 50 µm or 100 µm.

Material Properties

Property Typical Value (Post-Cured)
Ultimate Tensile Strength 28 MPa
Tensile Modulus 1.0 GPa
Elongation at Break 55%
Flexural Strength 24 MPa
Notched IZOD Impact 114 J/m
Heat Deflection Temp @ 0.45 MPa 41 °C

*Note: Values shown are typical post-cured results. Properties can vary based on geometry, orientation, settings, and post-processing. Refer to Formlabs documentation for validated workflows.

Workflow Overview

Durable Resin is a print + wash + post-cure workflow. For functional performance and consistent mechanical properties, follow the recommended Formlabs process for cleaning and curing.

  • Print using the Durable Resin preset for your printer and chosen layer height.
  • Wash with the recommended solvent and timings for clean surfaces and accurate fits.
  • Post-cure to achieve intended strength, stiffness, and impact performance.
  • Finish as needed (light sanding, deburring) for smooth motion and contact surfaces.

Supply note (Form 4): Formlabs has announced Durable Resin V2.1 for Form 4 generation printers will no longer be available for direct purchase from Sunday, 31 May 2026, and recommends switching to Tough 1000 Resin V1.

FAQ

1) What should I choose Durable Resin for?

Squeezable prototypes, low-friction assemblies, and jigs/fixtures that experience impacts — especially where you want a polyethylene-like feel.

2) Does Durable Resin need post-curing?

Yes — post-curing is required to reach typical mechanical properties and intended performance.

3) What layer heights are supported?

50 µm and 100 µm are commonly supported for Durable Resin workflows.

(70817)

SKU 70817
Brand Formlabs

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