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DSM Somos SLA
Somos 9120
Engineering-plastic-like SLA material balancing rigidity and functionality, with strong fatigue performance and memory retention.
More from SomosSomos 9120 is a translucent, semi-flexible SLA resin with mechanical properties that mimic many engineering plastics. Parts show good fatigue resistance and strong memory retention. They have a balance of rigidity and flexibility that suits snap fits as well as other parts that have to move. It also offers good chemical resistance and a wide processing window.
Key properties
| Property | Value (UV post-cure) | Test method |
|---|---|---|
| Tensile strength | 31 MPa | ASTM D638 |
| Elongation at break | 20% | ASTM D638 |
| Flexural modulus | 1,380 MPa | ASTM D790 |
| Izod impact (notched) | 51 J/m | ASTM D256 |
| HDT at 0.46 MPa | 60°C | ASTM D648 |
| Colour | Translucent |
Figures from the Stratasys Somos materials overview (2025), after UV post-cure, using the ASTM methods shown. Values vary with machine, processing and post-cure. Product description checked on stratasys.com in October 2026.
Key benefits
Strong memory retention
Fatigue resistance
Semi-flexible, good for snap fits
Superior chemical resistance
Translucent appearance
Typical applications
Snap fits, plus form, fit and function testing
Automotive parts and tooling
Electrical casings and housings
Fluid flow analysis
Functional packaging prototypes
Jigs and fixtures
Supply in the UK
Supplied by Europac 3D for UnionTech SLA printers. Stratasys list Somos 9120 as compatible with large-frame, 355 nm laser-based open stereolithography printers. See the rest of our UnionTech SLA resin range. Somos 9120 is priced on application, so ask us for a quote and tell us which machine you run.
Supplied for UnionTech 355 nm SLA machines only: the Pilot, RSPro, RA, D600 and Lite ranges. Confirm the exact model and resin profile with us before ordering. Not for UnionTech SLM metal, DLP or LCD systems, or for other printer brands.
Works with these machines
Profiles are pre-tuned for these. Running it on something else is usually possible — ask and we will tell you honestly.
- UnionTech Pilot Series SLAIndustrial SLA in an open material system — run Somos or any resin that suits the job. PILOT 250 and PILOT 450, from a 250 mm to a 450 mm platform.View machine →
- UnionTech RSPro Series SLALarge-format industrial SLA up to a 2.1 m build — full-size parts, props and patterns in one piece, on a completely open resin platform.View machine →
- UnionTech RA600SLA printer for tyre mould production. Build volume 600 × 600 × 400 mm, tread patterns held to ±0.1 mm.View machine →
- UnionTech RA900Dual-laser SLA printer for tyre mould production. Build volume 950 × 550 × 400 mm.View machine →
- UnionTech Lite 600 2.0Compact industrial SLA for small-batch production of general parts. Build volume 600 × 600 × 400 mm.View machine →
- UnionTech D600SLA printer set up for dental and orthodontic models. Build platform 600 × 600 mm.View machine →
