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DSM Somos SLA
Somos WaterShed Black
Rigid, tough true-black SLA resin with minimal finishing and strong moisture and chemical resistance.
More from SomosSomos WaterShed Black is a rigid, tough SLA resin that prints in a true black, so parts need no painting. It has similar properties and processing to Somos WaterShed XC 11122. Stratasys quote up to 50% faster processing than other black SL materials, with minimal finishing, more consistent processing over time plus good moisture and chemical resistance. It has been tested to the SAE J2527 weathering standard for functional prototypes and end-use parts.
Key properties
| Property | Value (UV post-cure) | Test method |
|---|---|---|
| Tensile modulus | 2,300 ± 300 MPa | ASTM D638M |
| Ultimate tensile strength | 35 ± 5 MPa | ASTM D638M |
| Elongation at break | 12 ± 3% | ASTM D638M |
| Flexural strength | 66 ± 5 MPa | ASTM D790 |
| Flexural modulus | 1,750 ± 250 MPa | ASTM D790 |
| Izod impact (notched) | 22 ± 5 J/m | ASTM D256A |
| Hardness (Shore D) | 79 | ASTM D2240 |
| Water absorption (24 hours) | 0.30 ± 0.05% | ASTM D570-98 |
| HDT at 0.46 MPa | 52 ± 3°C | ASTM D648 |
| HDT at 1.81 MPa | 46°C | ASTM D648 |
Figures from the current Stratasys Somos WaterShed Black data sheet. Values vary with machine, processing and post-cure. Product description checked on stratasys.com in October 2026.
Key benefits
Easy to use, with fast processing and minimal finishing
Truer black colour straight from the machine
Based on proven Somos WaterShed XC 11122 technology
Smooth surface finish
Superior moisture and chemical resistance
Weatherable for functional and end-use parts
Typical applications
Automotive components
Electronic housings
Packaging
Functional prototypes and end-use parts
Jigs, fixtures and manufacturing aids
Supply in the UK
Supplied by Europac 3D for UnionTech SLA printers. Stratasys list Somos WaterShed Black as compatible with large-frame, 355 nm laser-based open stereolithography printers. See the rest of our UnionTech SLA resin range. Somos WaterShed Black 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 →
