Elastomer Service Properties: VMQ
Service temperature limits, chemical resistance ratings, mechanical properties, and cure data for engineering elastomers and rubber compounds
| elastomer | grade or variant | acid resistance | astm designation | chemical resistance notes | common name | compression set pct (%) | compression set temp C | compression set time hr | cure system | density g cm3 (g/cm3) | elongation at break pct (%) | fuel resistance | gas permeability | glass transition temp C (C) | hardness range shore a | industry specifications | max continuous temp C (C) | max peak temp C (C) | max service temp C (C) | min service temp C (C) | notes | oil resistance | ozone resistance | steam resistance | tensile strength mpa (MPa) | tr10 temp C |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VMQ | general | Fair | FC, FE, GE (ASTM D2000) | Excellent ozone, UV, and weathering resistance; poor oil/fuel resistance; wide temperature range; low tensile and tear strength; physiologically neutral | Silicone Rubber | 15-35 | 175 | 22 | platinum or peroxide | 1.10-1.25 | 100-700 | Poor | High | -123 | 20-90 | AMS 3325, AMS 3357, MIL-R-5847, FDA 21 CFR 177.2600 | 200 | 230 | 204 | -60 | MQ/VMQ = methyl/methyl-vinyl polysiloxane; special grades to -115C | Fair | Excellent | Fair | 5-10 | -60 |
| VMQ | high_temp | Fair | GE (ASTM D2000) | Special formulations for continuous service to 260C; slightly reduced low-temp limit vs standard grades | Silicone Rubber (High Temp) | 20-40 | 200 | 22 | peroxide | 1.10-1.25 | 100-500 | Poor | High | -123 | 30-80 | AMS 3345, AMS 3357 | 260 | 300 | 260 | -55 | Iron oxide or cerium oxide fillers for extended heat life; aerospace, exhaust, oven seals | Fair | Excellent | Fair | 4-10 | -55 |
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