3M™ Class B Aerospace Sealant, Black/Off-White (Accelerator/Base), 24 hr, 6 oz

3M™ aerospace sealant AC-645 B-2 is a low density, two component, manganese dioxide cured, liquid polysulfide polymer system. It is suitable for use in fuel tank, fuselage hole filling, cavity filling and fuel tank filleting applications. It has outstanding resistance to jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. 3M™ AC-645 B-2 sealant maintains its flexibility and bond strength on most metal substrates such as - aluminum, titanium, steel, stainless steel 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. It has excellent tooling properties.
Specifications
• Series: AC-645 B-2
• Container Size: 6 oz
• Color: Black/Off-White (Accelerator/Base)
• Specific Gravity: 1.07
• Viscosity: 8000 to 12000 poise (Base), 700 to 1600 poise (Accelerator)
• Applicable Materials: Aluminum, Stainless Steel, Steel, Titanium
• Shelf Life: 183 days
• Application Time: 2 hr