- Family
- VMQ (silicone)
- Standard range
- -54 C to 204 C (Parker® O-Ring Handbook ORD 5700)
- Special grades
- to -115 C, to 260 C
- Durometers
- 30 to 70 Shore A solid; sponge by density
- Standards
- ASTM D1418 VMQ; ASTM D2000 line callouts; A-A-59588; SAE AMS 3302
- Product
- Sheet gaskets waterjet-cut to your drawing in Orange, California
Service temperatures here are the family figures published in Parker O-Ring Handbook ORD 5700A/US §2.2; the compound datasheet and your application govern the final choice.
Every common gasket sheet material is quick for us to source, and we cut it to your print on our waterjet. The other sheet materials are on the waterjet-cut gaskets page.
Silicone is a gasket material with a wide temperature range, for static service, dry heat, extreme cold, and food and medical equipment on compliant compounds. The Parker O-Ring Handbook (ORD 5700) rates the family from -54 C (-65 F) to 204 C (400 F), with special compounds reaching -115 C and 260 C. Conquest cuts solid and sponge silicone sheet gaskets on the waterjet in 1/32, 1/16, 1/8, 3/16 and 1/4 in thicknesses.
What we cut
Conquest cuts sheet gaskets on a pure-water waterjet, the one product made in house. Tolerance is set to your drawing and confirmed on the quote, and the waterjet's size limits and the tolerance class for solid rubber are on the custom gaskets page. There is no die to build, so prototypes, revision changes and short runs go through the same setup as a repeat, and expensive stock nests tightly with no die-skeleton waste. We cut solid silicone sheet in 30, 40, 50, 60 and 70 Shore A and sponge by density, from 36 x 36 in sheet and 36 in rolls, with or without pressure-sensitive adhesive backing. Molded and lathe-cut parts, and non-sheet compounds, are supplied from our manufacturers.
Silicone gasket specifications
| Property | Value | Source |
|---|---|---|
| Continuous service temperature | -54 C to 204 C (-65 F to 400 F); special compounds -115 C and 260 C | Parker ORD 5700 |
| Material designation | VMQ under ASTM D1418; ASTM D2000 line callouts; the standard sets types by heat-aging resistance and classes by oil-swell resistance | ASTM D2000 |
| Specification callouts | A-A-59588 (supersedes ZZ-R-765E); SAE AMS3302 (revision J, 2019), one of the AMS3301 to AMS3305 general-purpose silicones, graded by hardness | SAE Mobilus AMS3302 record, read 2026-09-28; Parker O-Ring Handbook ORD 5700, Tables 8-3 and 8-4, read 2026-09-24 |
| Compliance available | FDA 21 CFR 177.2600 and USP Class VI on specific compounds, such as Rogers' platinum-cured BISCO® MS-1600 solid silicone | Rogers Corporation, BISCO MS-1600 Series Medical and Life Science Solid Silicone data sheet, publication 180-358, read 2026-09-27 |
Where silicone gaskets work, and where they fail
| Medium or condition | Verdict | Note (Parker O-Ring Handbook ORD 5700) |
|---|---|---|
| Dry heat: ovens, heaters, lighting, enclosures | Excellent | The core silicone application |
| Extreme cold | Excellent | Flexible at the cold end of the Parker range; special compounds go colder |
| Food, beverage, medical contact (static) | Excellent on compliant compounds | The food and medical default |
| Ozone, weather, UV; electrical insulation | Excellent | Saturated backbone; high dielectric strength |
| Hot water | Good | Steam degrades standard compounds; the compound sheet states any steam rating |
| Fuels, petroleum oils | Not recommended | Swells; use nitrile or Viton® |
| Dynamic or abrasive service | Not recommended | Low tear strength; static seals only |
Where silicone is used, and the usual alternatives
It is usually specified for enclosure and lid gaskets in dry heat or cold, sponge gaskets for cushioning and sealing under low bolt load, and food, beverage and medical equipment on a compliant compound. It is not the sheet for oil or fuel (nitrile or Viton), for steam (EPDM), or for anything that moves. The silicone O-ring guide covers the same material in O-ring form and the FDA guide the compliance schemes.
Sources: ASTM D1418-22, public abstract (read 2026-09-28); ASTM D2000-18(2024)e1, public scope (read 2026-09-25); Parker O-Ring Handbook ORD 5700 §2.2 (read 2026-09-14) and section VIII, Tables 8-3 and 8-4, for A-A-59588 and the AMS3301 to AMS3305 silicones (read 2026-09-24); SAE Mobilus record for AMS3302 (read 2026-09-28); Rogers Corporation, BISCO MS-1600 Series Medical and Life Science Solid Silicone data sheet, publication 180-358 (read 2026-09-27): 21 CFR 177.2600 and USP Class VI for that grade.
Parker is a trademark of Parker Hannifin Corporation. Viton is a trademark of The Chemours Company; BISCO is a trademark of Rogers Corporation. No affiliation or endorsement is implied.
Frequently asked
Solid or sponge silicone?
Sponge seals under low closing force and cushions; solid seals pressure and holds dimensions. Sponge is specified by density and compression-deflection rather than durometer.
Is red silicone different from white?
Only in pigment. Compliance comes from the compound sheet, never the color.
Can a silicone gasket be autoclaved?
Specific medical compounds are rated by their makers for steam sterilization cycles; standard silicone degrades in steam. The compound sheet states any steam rating.
Does silicone take adhesive backing?
Yes; silicone sheet is supplied with a pressure-sensitive adhesive on one side for enclosure gaskets, and the waterjet cuts it with the liner on.
Setting Conquest Seal up as a supplier?
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Send the Silicone gasket drawing and the quantity
A DXF, DWG or PDF of the gasket, the sheet thickness, the durometer and the quantity. Gaskets are cut in our own shop in Orange, California; a Conquest representative replies. Quotes answered within one business day. A person answers (714) 632-9830, Pacific business hours.
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