3M™ Aerospace AC-665 Class C Fay Surface Polysulfide Fuselage Sealant
The 3M™ Aerospace Sealant AC-665 family of products is designed to create a highly effective seal on many metals, composites and coated substrates. AC-665 is engineered for long-term resistance to many chemicals used throughout the aerospace industry. 3M™ Aerospace Sealant AC-665 maintains flexibility and bond strength under extremes of temperature, weathering and stress. The mixed compound is a thixotropic paste formulated for easy application by injection gun or spatula. AC-665 is available as a two-part product in both kit and bulk-packaging forms, to meet a variety of process requirements. With its excellent tooling and corrosion inhibiting properties, AC-665 is ideal for sealing faying surfaces and joints, and for preventing channeling leakage as needed. AC-665 Class B and C versions provide a wide range of application lives and cure times.
Mixing 3M™ Class C version results in a flowable, faying surface grade material that is easily applied by brush, roller, spatula, or extrusion gun. Application and assembly times vary by product, allowing you to design flexibility into your workflow processes.