3M AC-380 B-1/2 Aerospace Sealant

This material is designed for fillet sealing of fuel tanks and other aircraft fuselage sealing applications. It offers as much as thirty percent weight savings, per unit volume, over traditional sealants with similar purpose.

The cured sealant has outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. The sealant will resist limited contact to diphosphate ester based hydraulic fluid. It is a two-part, manganese dioxide cured, polysulfide polymer based sealant that maintains flexibility and bond strength on most metal substrates such as aluminum, titanium, steel, stainless steel, common composites and many coatings under extremes of temperature, weathering and stress. The mixed compound is a thixotropic paste easily applied by extrusion, injection gun or spatula, and exhibits superb tooling properties.

Applications:

• Sealing integral fuel tanks
• Repairing integral fuel tanks
• Sealing fuselages