3M AC-645 B-2 Aerospace Sealant

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3M AC-645 B-2 Aerospace Sealant
Categories:	Polymer; Thermoset; Polysulfide Sealant/Adhesive
Material Notes:	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 tanks, 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 meal 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. Information provided by 3M
Vendors:

Available Properties

Density, STM 40-107, cured 14 days @ 50% RH
Volatiles
Brookfield Viscosity, Accelerator, RVF #7 sp @ 10 rpm
Brookfield Viscosity, Base, RVF #7 sp @ 2 rpm
Hardness, Shore A, STM 40-107, cured 14 days @ 50% RH
Tensile Strength at Break, STM 40-107, Standard Cure
Tensile Strength at Break, STM 40-107
Elongation at Break, STM 40-107, Standard Cure
Elongation at Break, STM 40-107
Peel Strength, STM 40-107, Dry-Std, Alclad
Peel Strength, STM 40-107, JRF, Alclad
Peel Strength, STM 40-107, JRF, Alclad
Maximum Service Temperature, Air, STM 40-107, cured 14 days @ 50% RH
Minimum Service Temperature, Air, STM 40-107, cured 14 days @ 50% RH
Cure Time
Tack-Free Time
Shelf Life

Property Data

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Manufacturer Notes:
none

Category Notes
Plastic

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