High Temp Resin
The highest heat deflection temperature of any Formlabs resin, at 238 °C. High Temp Resin holds fine detail through repeated thermal cycles, for molds, inserts, and parts that sit in hot air, gas, or fluid flow.
Real High Temp Parts
Actual Formlabs SLA prints in High Temp Resin, not renders.
Summary & Key Takeaways
- 238 °C Heat Deflection: The highest thermal rating among Formlabs resins at 0.45 MPa, matching Rigid 10K.
- For Hot Air, Gas, and Fluid Flow: Suited to airflow and thermal test models, heat shields, and parts near hot media.
- Detailed Molds and Inserts: Fine SLA resolution captures sharp parting lines and small features for casting and molding tooling.
- Rigid, Not Ductile: Only 2% elongation at break and 17 J/m notched Izod; not for snap fits, flexing, or impact.
Compare High Temp to Other 3D Printing Materials
A quick, scannable comparison against the other heat-capable materials we print. All values are shown at once; use the buttons to focus on one comparison at a time.
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| Property | High Temp | Rigid 10K | Flame Retardant | Nylon 12 GF SLS |
|---|---|---|---|---|
| Tensile modulus | 2.8 GPa | 11 GPa | 3.1 GPa | 2.8 GPa |
| Flexural strength | 97 MPa | 158 MPa | 75 MPa | 56 MPa |
| Elongation at break | 2% | 1% | 7% | 4% |
| Notched Izod impact | 17 J/m | 20 J/m | 22 J/m | 36 J/m |
| Heat deflection temp (0.45 MPa) | 238 °C | 238 °C | 111 °C | 170 °C |
| Support structures | Removable supports for overhangs | Removable supports for overhangs | Removable supports for overhangs | None required |
Why Choose High Temp Resin?
The material to reach for when the governing requirement is temperature rather than strength or toughness.
Highest Thermal Rating We Print
A 238 °C heat deflection temperature at 0.45 MPa lets parts sit in hot air, gas, and fluid streams, or serve as molds and inserts, without softening or losing dimension the way standard and tough resins do.
Fine Detail for Tooling
SLA resolution captures sharp parting lines, thin ribs, and small features directly from CAD, so casting inserts and short-run molds come off the printer ready to use rather than needing machining.
Dimensional Stability Under Cycling
A 2.8 GPa tensile modulus and 97 MPa flexural strength keep parts stiff at temperature, so thermal test fixtures and housings hold tolerance across repeated heat cycles.
High Temp Design Rules (DFM) at a Glance
Formlabs SLA design guidelines for Form 3 and Form 4 generation printers. Check your CAD feature dimensions against these limits before uploading your file.
| Min. wall thickness (supported) | 1.0 mm |
|---|---|
| Min. wall thickness (unsupported) | 1.0 mm |
| Min. embossed detail | 0.1 mm |
| Min. engraved detail (width & depth) | 0.15 mm |
| Min. hole diameter | 0.5 mm |
| Min. drain hole diameter | 2.5 mm |
| Clearance between separate or moving parts | 0.5 mm min |
| Max. unsupported overhang | 5.0 mm · 10° min. angle from level |
| Max. single-part build size | 353 × 196 × 350 mm |
Source: Formlabs SLA design specifications for Form 3 / Form 4 generation printers, adapted to hold walls to a higher minimum than Formlabs' published figures. High Temp is a stiff, low-elongation resin, so thin walls and sharp internal corners are more prone to cracking than in a standard or tough resin; add fillets and stay at or above the minimum wall for handled or load-bearing features. These are general guidelines; cross-section, hole depth, and part geometry can shift the safe minimums for a specific design. Maximum build size reflects our largest-format SLA printer; actual build size depends on which machine your order routes to.
Frequently Asked Questions
Everything you need to know about designing, ordering, and using High Temp parts on Form Now.