Cast Silicone
Cast Silicone
Cast Silicone is a cast silicone silicone — platinum-cure silicone, high temp and biocompatible. Typical values: 4 MPa yield, 1.12 g/cm³, rated to 200 °C. Available for Urethane casting at FabDigit.
Properties
Typical room-temperature values in the Shore A 40 condition. Metric first, imperial in gray. The bars show where Cast Silicone sits against the other 1 silicone grades in the catalog.
Datasheet
| Yield strength | 4 MPa1 ksi |
|---|---|
| Tensile strength | 8 MPa1 ksi |
| Hardness | Shore A 20-70 |
| Density | 1.12 g/cm³0.04 lb/in³ |
| Specific strength (yield ÷ density) | 4 |
| Min service temp | -55 °C-67 °F |
| Max service temp | 200 °C392 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other silicone grades
Conditions and tempers
How Cast Silicone is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Shore A 40Default Hardness | Soft — gaskets, pads that must conform to surfaces | — | — | — | — |
Shore A 30 Hardness | Very soft — grips, cushioning seals (rubber-band feel) | — | — | — | — |
Shore A 50 Hardness | Flexible — seals, vibration mounts (eraser feel) | — | — | — | — |
Shore A 60 Hardness | Medium — gaskets, overmolds (tire-tread feel) | — | — | — | — |
Shore A 70 Hardness | The default urethane — durable flexible parts, most common pick | — | — | — | — |
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.