Resin
High-Temp Resin
Heat-resistant parts: molds, tooling, prototypes under heat. High heat deflection temperature (HDT).
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Material passport
Density1.1 g/cm³
Encyclopedia
High-temp resin keeps its stiffness and shape at temperatures that would soften ordinary resins. It has a high heat deflection temperature (HDT) — the part does not sag under hot air, steam, or near heated surfaces. It is used for production tooling, molds, and prototypes that work in heat.
What it is good for
- Molds for thermoforming and low-heat casting
- Tooling and jigs near heated surfaces
- Prototypes tested at elevated temperature
- Parts near heat sources
Where NOT to use it
- Impact loads — high-temp resins are usually brittle
- Flexible parts — the material is rigid
- Household decor where heat resistance is not needed (overpaying)
- Long-term load under weight — creep is possible
How to print
- Normal layer exposure: dialed in with a test; high-temp resins are often thicker and need a bit more
- Bottom layer exposure: 30–50 s
- Layer height: 0.03–0.05 mm
- Cure wavelength: 405 nm
- A vat heater (if available) helps — high-temp resins are viscous and print worse when cold
Liquid resin is toxic and a skin irritant — work in nitrile gloves in a ventilated room and avoid skin and eye contact. Wash prints in isopropyl alcohol (IPA) and always do a final UV cure: only then does the resin become safe to handle.
Washing, curing and storage
For high-temp resins the final UV cure is especially important — it is what unlocks heat resistance.
- Washing: 4–6 minutes in isopropyl alcohol (IPA)
- UV curing: thorough and complete — extended or thermal curing is often recommended for maximum HDT
- Storage: dark, tightly sealed bottle
- Stir before printing; viscous resin likes a warm room
The rated heat resistance (HDT) is reached only after a full final UV cure, sometimes with extra heating. An under-cured part will sag under heat even if it is high-temp resin. Cure per the maker's instructions.
Pros and cons
- High heat resistance — does not sag under heat
- Keeps stiffness at elevated temperature
- Suitable for tooling and molds
- Good detail
- Usually brittle
- Viscous, fussier to print when cold
- Full HDT only after thorough curing
- Same liquid-resin toxicity
FAQ
Specific numbers depend on the brand and are given as HDT (heat deflection temperature). High-temp resins clearly outperform ordinary ones, but always check the exact figure in the resin's spec — it is reached only after a full cure.