Tough Resin
Tough Resin — Impact-Resistant.
Functionally Strong.
Tough Resin is our engineering-grade photopolymer, formulated for functional parts that must survive mechanical stress, impact, and repeated loading. With 45–70 MPa flexural strength and up to 25% elongation at break, it bridges the gap between standard resins and engineering thermoplastics.
Get Instant Quote
About Tough Resin
Tough Resin is a high-performance engineering photopolymer specifically formulated to resist impact and absorb mechanical stress without cracking. With a flexural strength of 45–70 MPa, tensile strength of 36–53 MPa, and elongation at break of 14–25%, it behaves far more like an engineering thermoplastic than a standard brittle resin.
We print your Tough Resin parts at layer heights as fine as 0.05 mm on professional SLA machines. Parts are cleaned in IPA and UV post-cured to maximise toughness and dimensional stability. Its ~1.195 g/cm³ density and Shore hardness of ~84D–85D mean parts are stiff yet resilient — they will bend slightly under load rather than snap.
Tough Resin is the resin of choice for functional prototypes, snap-fit assemblies, enclosures, joints, brackets, and any part where the brittleness of Standard Resin is unacceptable. It can be drilled, tapped, and heated slightly for press-fit inserts.
Material Properties
| Property | Value | Standard / Method |
|---|---|---|
| Tensile Strength | 36–53 MPa | ISO 527 |
| Flexural Strength | 45–70 MPa | ISO 178 |
| Elongation at Break | 14% – 25% | ISO 527 |
| Shore Hardness | ~84D – 85D | ISO 868 |
| Impact Resistance | High (vs Standard / Clear Resin) | — |
Values are typical for cured specimens. Actual results depend on exposure settings, layer height, and post-cure duration.
| Property | Value | Test Method |
|---|---|---|
| Density | ~1.195 g/cm³ | ISO 1183 |
| UV Wavelength | 405 nm | — |
| Layer Height | 0.05–0.2 mm | — |
| Post-Cure | UV curing required (maximises toughness) | — |
| Drillable / Tappable | Yes | — |
| Heat Formable | Yes (slight heating for press-fit) | — |
| Property | Value |
|---|---|
| Chemical Family | Toughened acrylate photopolymer |
| Odour | Mild (during printing, ventilated environment) |
| Solubility | Insoluble when cured |
| Chemical Resistance | Moderate (avoid prolonged solvent contact) |
| Flammability | Resin: flammable. Cured part: non-flammable |
| Cleaning Agent | Isopropyl alcohol (IPA) or ethanol |
| Post-Processing | Drillable, tappable; can be lightly heated for inserts |
Performance Ratings
Available Colours
✦ 1 stock colour (Tough Black). Contact us for custom colour requirements.
Design Guidelines for Tough Resin
For fine visual detail without toughness requirements, Standard Resin gives a better surface finish. For optical transparency, Clear Resin is available. For high-temperature structural parts or large volumes, our FDM service with ABS or PETG is a better fit.