AMS3346 Silicone Sheet & Uncured Compound
AMS 3346 is an Aerospace Material Specification defining a 60 durometer aerospace silicone engineered for demanding high-temperature and structural sealing applications. Known for exceptional tear resistance, low compression set, and thermal stability from -80°F to 450°F (-62°C to 232°C), AMS 3346 silicone is a trusted material across military, defense, commercial aviation, and critical industrial manufacturing sectors.
At ElastaPro, we manufacture premium-grade AMS 3346 solid silicone sheeting, continuous rolls, and uncured silicone compounds formulated for reliable die-cutting, custom molding, and gasket fabrication.
Key Performance Properties
- Durometer Hardness: 60 ± 5 Shore A
- Tensile Strength: High strength rating suitable for dynamic mechanical environments
- Tear Resistance: Superior tear propagation resistance compared to standard commercial-grade silicones
- Thermal Range: Continuous performance from -80°F to +450°F (-62°C to +232°C)
- Chemical Compatibility: Resistant to ozone, UV radiation, weathering, moisture, and mild chemicals or fluids
- Outgassing & Purity: Clean formulation meeting strict aerospace thermal and atmospheric stability requirements
Material Form Factors
ElastaPro supplies AMS 3346 material across flexible manufacturing formats to streamline your production:
AMS 3346 Cured Silicone Sheeting & Rolls
- Gauges: Available in standard thickness options from 0.010″ to 0.500″
- Widths: 36″, 48″, and 60″ continuous rolls, or custom slit widths
- Color Options: Red/Orange, Gray, Black, and Translucent (custom color matching available)
AMS 3346 Uncured Silicone Compound
- Supplied in slabs, continuous strips, or calendared uncured rolls
- Formulated for compression molding, transfer molding, or custom vulcanization workflows
- Engineered with precise shelf-life and storage temperature parameters
Primary Applications for AMS3346 Silicone
- Aerospace & Defense: Engine compartment seals, airframe gaskets, environmental sealing, and vibration damping mounts.
- Electronics & Enclosures: Weather-tight cabinet gaskets exposed to extreme temperature swings and harsh outdoor elements.
- Industrial & Transportation: High-durability diaphragms, fluid transfer seals, and thermal insulation pads.
Frequently Asked Questions (FAQ)
What is the difference between AMS 3346 cured sheet and uncured compound?
Cured AMS 3346 silicone sheet is fully vulcanized during manufacturing and ready for immediate die-cutting, waterjet cutting, or slitting into gaskets. Uncured AMS 3346 compound is un-vulcanized, allowing fabricators and molders to press, form, and cure the material into complex three-dimensional custom parts using custom tooling.
Is AMS 3346 suitable for high-tear applications?
Yes. AMS 3346 explicitly requires high tensile and tear properties compared to general-purpose silicone grades, making it ideal for dynamic seals subject to flexing, movement, or mechanical stress.
Does ElastaPro supply pressure-sensitive adhesive (PSA) backing on AMS 3346 sheets?
Yes. We supply cured AMS 3346 roll stock with acrylic or silicone pressure-sensitive adhesives applied to one or both sides to simplify gasket placement during assembly.
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