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Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg

Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg
Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg
Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg
Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg
Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg
Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg
Formlabs Flame Retardant Resin Cartridge for Form 4, 1 kg

Secure your industrial workflow with the Formlabs Flame Retardant Resin for Form 4, 1 kg, 0.84 l. Designed specifically for the aerospace, automotive, and electronics sectors, this UL 94 V-0 certified material lets you produce self-extinguishing, rigid, creep-resistant parts that withstand high temperatures. Achieve injection-moulding surface fidelity without the high tooling costs.


Advanced capabilities of the Formlabs Flame Retardant Resin for Form 4, 1 kg, 0.84 l

Certified safety for critical environments

In industries where ignition sources are a constant risk, material certification is non-negotiable. This resin is formulated to be halogen-free and self-extinguishing, meeting the rigorous UL 94 V-0 (at 3 mm) and FAR 25.853 standards. Whether you are prototyping interior cabin components for rail and aerospace applications or creating protective enclosures for medical electronics, this material ensures your parts exceed the required Flammability, Smoke, and Toxicity (FST) ratings. It removes the traditional barriers to entry for manufacturing certified components destined for hazardous environments.


Industrial mechanics and machinability

Unlike standard resins that can soften or deform under load, the Formlabs Flame Retardant Resin for Form 4, 1 kg, 0.84 l delivers exceptional rigidity with a tensile modulus of 3.1 GPa after post-curing. This stiffness makes it highly functional for custom jigs, fixtures, and spare parts that must maintain dimensional accuracy over the long term. Furthermore, the material is designed to withstand post-manufacturing operations — you can tap, trim, and drill these prints just as you would with traditional engineering plastics, ensuring seamless integration into complex assemblies.


Injection-moulding aesthetics and thermal resistance

Visual fidelity is often compromised in functional 3D printing, but not here. This resin produces isotropic parts with an XY resolution of 25 microns, delivering a surface finish that rivals injection-moulded plastics. This is critical for consumer-facing parts or internal automotive components where texture and fit are paramount. Combined with a heat deflection temperature of 111 °C (at 0.45 MPa), the material resists creep even in high-temperature industrial environments, bridging the gap between prototyping agility and end-use durability.



Technical specifications of the Formlabs Flame Retardant Resin for Form 4, 1 kg, 0.84 l

Parameter / Property Value / Specification
Flammability and Smoke Toxicity
UL 94 Rating V-0 (3 mm), V-1 (2.5 mm), HB (1.5 mm)
FAR 25.853 Appendix F, Part I Pass (2.5 mm) — Vertical combustion 12s
Smoke generation (ASTM E662) — 3 mm Flaming mode: Ds @ 1.5 min = 19.5, Ds @ 4 min = 285
Smoke generation (ASTM E662) — 5 mm Flaming mode: Ds @ 1.5 min = 5, Ds @ 4 min = 114
Gas toxicity (BSS 7239) Pass at 3 mm (CO: 56 PPM, HCN: 7 PPM, SO2/HCl/HF/NOx: <1 PPM)
Mechanical Properties (Metric / Imperial)
Ultimate Tensile Strength (ASTM D638) Green: 24 MPa (3560 psi) | Post-cured: 41 MPa (5990 psi)
Tensile Modulus (ASTM D638) Green: 1.8 GPa (263 ksi) | Post-cured: 3.1 GPa (446 ksi)
Elongation at Break (ASTM D638) Green: 20% | Post-cured: 7.1%
Flexural Strength (ASTM D790) Green: 36 MPa (5280 psi) | Post-cured: 75 MPa (10900 psi)
Flexural Modulus (ASTM D790) Green: 1.3 GPa (188 ksi) | Post-cured: 2.7 GPa (401 ksi)
Notched Izod (ASTM D256) Green: 19 J/m | Post-cured: 22 J/m (0.42 ft-lb/in)
Unnotched Izod (ASTM D4812) Green: 227 J/m | Post-cured: 257 J/m (4.82 ft-lb/in)
Thermal Properties
HDT @ 1.8 MPa (ASTM D648) Green: 45 °C | Post-cured: 83 °C (181 °F)
HDT @ 0.45 MPa (ASTM D648) Green: 55 °C | Post-cured: 111 °C (232 °F)
CTE (20°– 80°C) (ASTM E813) Post-cured: 68.1 μm/m/°C (37.8 μin/in/°F)
Glass Transition Temperature (Tg) Green: 101 °C | Post-cured: 144 °C (291 °F)
Electrical and General Properties
Hardness (ASTM D2240) Green: 74D | Post-cured: 80D
Bulk Density (ASTM D792) 1.25 g/cm³
Viscosity (25 °C) / Colour 4500 – 5000 cP | Light grey
Dielectric Strength (ASTM D149) 15.1 kV/mm
Outgassing (ASTM E595) Pass (TML: 0.87%, CVCM: <0.01%, WVR: 0.2%)
Solvent Compatibility (24 h)
Excellent resistance (< 0.1%) Petrol, Diesel, Skydrol 5, Brake/power steering fluid, Oils, HCl (10%).
Moderate resistance Acetone (2.1%), Hydrogen peroxide 30% (1.0%), Butyl acetate (0.4%).
Incompatible Sulphuric acid 30% (disintegration)


At EXPERT3D, we have been leading the Additive Manufacturing industry since 2012, ensuring our customers have access to only the highest level of engineering materials. As an official Formlabs representative, we guarantee the best price, authorised service, and official warranty on all resins and equipment.


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