Description
Permatex® Aviation Form-A-Gasket® No. 3 Sealant Liquid is a dark reddish-brown, slow-drying, non-hardening liquid that cures into a pliable, tacky film through solvent evaporation. This brush-top liquid sealant is specially formulated for sealing close-fitting machined surfaces, solid gaskets, and threaded connections in aviation, marine, industrial, and automotive applications.
The product is qualified to Military Specification MIL-S-45180D, Type III, confirming its reliability for critical aviation and defense applications.
Key Features & Benefits
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Meets MIL-S-45180D, Type III
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Slow-drying, flexible-setting formula
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Pliable seal resists vibration and thermal cycling
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Withstands pressures up to 5000 psi
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Resists gasoline, oil, grease, transmission fluid, ethylene glycol, and seawater
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Temperature resistance: -65°F to 400°F (-54°C to 204°C)
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Approved for use in aviation, marine, industrial, and automotive assemblies
Common Applications
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Dressing for solid gaskets
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Close-fitting machined surfaces
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Threaded connections
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Aviation engines
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Marine engines
Technical Specifications
| Property | Value |
|---|---|
| Chemical Type | Modified resin, fillers & alcohol |
| Appearance | Dark brown liquid |
| Odor | Alcoholic |
| Specific Gravity | 1.1 |
| Viscosity | Viscous liquid |
| Flash Point (TCC) | 60°F |
| Temperature Range | -65°F to 400°F (-54°C to 204°C) |
| Pressure Resistance | Up to 5000 psi |
| Military Spec | MIL-S-45180D, Type III |
Compliance & Safety
Not recommended for use in pure oxygen or strong oxidizing environments. Refer to the Permatex MSDS for safe handling instructions.
Need Assistance?
For bulk orders, application support, or technical questions, contact our sales team at [email protected] or call 800-220-1966.
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