Benchmark · 3 materials
VMQ vs Cast Silicone vs FVMQ
Side-by-side benchmark of 3 silicone grades.
PropertiesHow to read this table
- The best value in each row is in bold.
- Values are typical room-temperature figures for the default condition (temper / grade as listed).
- Relative cost is a market tier, not a price — it moves with region and volume.
- Confirm against the certified mill / resin datasheet before design release.
How to read this table
- The best value in each row is in bold.
- Values are typical room-temperature figures for the default condition (temper / grade as listed).
- Relative cost is a market tier, not a price — it moves with region and volume.
- Confirm against the certified mill / resin datasheet before design release.
| Property | VMQ | Cast Silicone | FVMQ |
|---|---|---|---|
| Yield strengthMPaksi | — | 4 MPa1 ksi | — |
| Tensile strengthMPaksi | — | 8 MPa1 ksi | — |
| Specific strengthMPa·cm³/g | — | 4 | — |
| Densityg/cm³lb/in³ | — | 1.12 g/cm³0.04 lb/in³ | — |
| Max service temp°C°F | — | 200 °C392 °F | — |
| Min service temp°C°F | — | -55 °C-67 °F | — |
| Electrical conductivity% IACS | — | < 0.001 % IACSinsulator | — |
| Relative cost | — | $$ Standard | — |
| Processes | Casting |
Where each grade sits
One track per property; coloured markers are the compared grades, the shaded band is the silicone family 10th–90th percentile and the tick its median.
Yield strength—
4 MPa1 ksifamily median 4 MPa1 ksi4 MPa1 ksi
Tensile strength—
8 MPa1 ksifamily median 8 MPa1 ksi8 MPa1 ksi
Density—
1.12 g/cm³0.04 lb/in³family median 1.12 g/cm³0.04 lb/in³1.12 g/cm³0.04 lb/in³
Hardness (HB equiv.)—
65 HBfamily median 170 HB481 HB
Max service temp—
200 °C392 °Ffamily median 200 °C392 °F200 °C392 °F
Electrical conductivity—
< 0.001 % IACSfamily median < 0.001 % IACS< 0.001 % IACS
Machinability—
20 / 100family median 60 / 10085 / 100
Relative cost—
20family median 2020
VMQCast SiliconeFVMQ
Strength versus weight
Manufacturing and finishing
| Capability | VMQ | Cast Silicone | FVMQ |
|---|---|---|---|
| Urethane casting | — | Yes | — |
| Default condition | — | Shore A 40 | — |
| Min. machined wall | — | — | — |
| Best machined surface | — | — | — |
| Heat treatments | — | — | — |
Typical handbook values for the default condition, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.