Resin (MSLA)

Flame Retardant Resin 3D printing

Flame Retardant is a self-extinguishing resin: the maker's data sheet reports a UL 94 V-0 rating at 3 mm. We print it in Brescia with MSLA.

Price band

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1 variantData checked on 13 November 2026

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What it is for

Flame Retardant resin is used for parts where behavior in fire matters: enclosures and lids of electrical equipment, supports for connectors and boards, cable ducts, internal components of machines and vehicles, jigs and tools used near heat sources. The maker's data sheet reports a UL 94 V-0 rating at 3 mm.

The rating depends on thickness: at 2.5 mm the sheet reports V-1 and at 1.5 mm HB. Do not choose it counting on thin self-extinguishing walls. For larger or tougher parts consider the flame-retardant filaments of the ABS, ASA and PC families, or Ultem.

Variants compared

Flame Retardant Resin: properties of the variants from the makers' data sheets, one column per variant
Property	Flame RetardantQuote
Property	green	post-cured 60 min at 70 °C	post-cured 120 min at 80 °C
Mechanical
Tensile strengthASTM D638-14	24 MPa	38 MPa	41 MPa
Tensile modulusASTM D638-14	1.8 GPa	2.9 GPa	3.1 GPa
Elongation at breakASTM D638-14	20%	9.4%	7.1%
Flexural strengthASTM D790-15	36 MPa	72 MPa	75 MPa
Flexural modulusASTM D790-15	1.3 GPa	2.7 GPa	2.7 GPa
Izod impact, notchedASTM D256-10	19 J/m	22 J/m	22 J/m
Shore hardnessASTM D2240, green	74 Shore D
Thermal
Heat deflection temperature (HDT) at 0.45 MPaASTM D648-16	55 °C	94 °C	111 °C
Heat deflection temperature (HDT) at 1.8 MPaASTM D648-16	45 °C	71 °C	83 °C
Glass transition (Tg)DMA	101 °C	130 °C	144 °C
Physical
DensityASTM D792-20, state not given on the sheet	1.25 g/cm³
Fire behavior
Flammability ratingUL 94, bars post-cured 60 min at 70 °C	V-0 at 3 mmV-1 at 2.5 mmHB at 1.5 mmpassed at 2.5 mm FAR 25.853, App. F, Parte I (a)(1)(ii)
Source	Resin maker's data sheet, Rev. 02 26/07/2023, PDFread on 13 November 2026

Typical values from the makers' data sheets, measured on specimens under the conditions stated. They are not guaranteed design values: for a critical application ask us for a test on your part.

Treatments after printing

The table gives three states: green, post-cured 60 minutes at 70 °C and post-cured 120 minutes at 80 °C. The UL 94 V-0 rating at 3 mm is measured by the maker on bars post-cured 60 minutes at 70 °C.

Design limits

Build volume: 353 × 196 × 350 mm
Minimum wall: 1 mm
Dimensional tolerance: ±0.3 mm up to 100 mm, ±0.3% above

These are the limits of the process, the same for every variant unless stated. For critical dimensions, talk to us before printing.

Which variant to choose

Flame Retardant is the only self-extinguishing resin in our catalog. For large or tougher parts choose a flame-retardant filament of the ABS, ASA or PC families; when heat comes on top of fire behavior, Ultem.

Data sheets

Resin maker's data sheet, Rev. 02 26/07/2023, PDFread on 13 November 2026
Columns: Flame Retardant

FAQ

Frequently asked questions

The maker's data sheet reports UL 94 V-0 at 3 mm, V-1 at 2.5 mm and HB at 1.5 mm, measured on bars post-cured for 60 minutes at 70 °C. These are figures for the material: we issue no declaration of conformity on the printed part. If your project requires one, write to us before asking for a quote.

After a 60-minute post-cure at 70 °C the data sheet reports a heat deflection temperature of 94 °C at 0.45 MPa; after 120 minutes at 80 °C, 111 °C at 0.45 MPa and 83 °C at 1.8 MPa (ASTM D648). With the longer post-cure the glass transition goes from 130 to 144 °C.

It is a stiff resin: after a 120-minute post-cure at 80 °C the data sheet reports a tensile strength of 41 MPa, a modulus of 3.1 GPa and an elongation at break of 7.1% (ASTM D638). It is fine for enclosures, supports and lids. For snap fits or parts exposed to impacts a tougher material is the better fit.

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