Permatex 80019 Aviation Form-A-Gasket No. 3 Sealant | 4 oz. Brush-Top Can | Oil Pan Sealant for Continental & Lycoming Engines

Permatex® Aviation Form-A-Gasket® No. 3 Sealant is a trusted, slow-drying, non-hardening gasket dressing and flange sealant designed to create durable, leak-resistant seals in demanding engine applications. Its flexible formula resists gasoline, diesel fuel, motor oil, gear oil, hydraulic fluids, antifreeze, and vibration, making it a favorite among aviation mechanics, engine builders, and restoration professionals.

Ideal for use on paper, fiber, cork, and composition gaskets, Permatex No. 3 fills minor surface imperfections while maintaining a flexible seal that allows for easier future disassembly. It is commonly used during the assembly and maintenance of Continental and Lycoming aircraft engines, including oil pans, valve covers, accessory housings, timing covers, water pumps, and threaded fittings where specified by the manufacturer.

The convenient 4 oz. brush-top can allows for precise, even application on gaskets and machined surfaces, helping prevent oil and fluid leaks without becoming brittle or cracking over time.

Note: Always follow the applicable Continental or Lycoming maintenance or overhaul manual for approved sealants and installation procedures.

Features

• Slow-drying, non-hardening gasket dressing
• Creates a flexible, leak-resistant seal
• Excellent resistance to gasoline, diesel fuel, engine oil, hydraulic fluid, and antifreeze
• Ideal for paper, fiber, cork, and composition gaskets
• Fills minor surface imperfections to help prevent leaks
• Easy future disassembly without damaging gasket surfaces
• Convenient brush-top can for precise application
• Suitable for aviation, marine, automotive, and industrial applications

Common Applications

• Engine oil pan (oil sump) gaskets
• Valve cover gaskets
• Timing covers
• Water pumps
• Fuel pump gaskets
• Thermostat housings
• Gearbox covers
• Threaded fittings (where specified)
• General gasket dressing and flange sealing

Compatible Engine Models

Continental

• 220 GPU (PE-150)
• O-470
• IO-470
• IO-520
• IO-550

Lycoming

• O-235
• O-290
• O-340
• O-360
• IO-360
• O-540
• IO-540

Specifications

• Manufacturer: Permatex
• Part Number: 80019
• Product: Aviation Form-A-Gasket® No. 3 Sealant
• Container Size: 4 oz.
• Container Type: Brush-Top Can
• Color: Dark Brown
• Cure Type: Slow-Drying, Non-Hardening
• Temperature Resistance: -65°F to 400°F (-54°C to 204°C)
• Made In: USA

Why Choose Permatex Aviation Form-A-Gasket No. 3?

For decades, Permatex Aviation Form-A-Gasket No. 3 has been the preferred gasket dressing for professional engine builders and aircraft mechanics. Its flexible, non-hardening formula provides dependable leak protection while making future maintenance and gasket replacement easier. Whether you're rebuilding a Continental 220 GPU or servicing a Lycoming O-540, this proven sealant helps deliver long-lasting performance and reliable sealing.