3M AC-240 Class B-1/2 Aerospace Sealant

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3M AC-240 Class B-1/2 Aerospace Sealant
Categories:	Polymer; Thermoset; Polysulfide Sealant/Adhesive
Material Notes:	3M Aerospace Sealant AC-240 Class B is a two-part, polysulfide-based, long application life, quick cure product for use as a sealant for integral fuel tanks and fuselages. This tow-component, manganese dioxide cured sealant is solvent free and has outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. 3M AC-240 Class B Sealants maintains flexibility and bond strength on most metal substrates like aluminum, titanium, stainless steel, steel, glass and many coatings under extremes of temperature, weathering and stress. The mixed compound has a low-sag consistency and can be readily applied with a spatula or extrusion gun on vertical surfaces. Information provided by 3M
Vendors:

Available Properties

Density, AMS-S-8802, cured 14 days @ 50% RH
Volatiles
Brookfield Viscosity, RVF #7 sp @ 2 rpm
Hardness, Shore A, cured 14 days @ 50% RH
Tensile Strength at Break, 24 hrs @ 121°C, and JRF-7 days @ 60°C
Tensile Strength at Break, Standard Cure - 14 days
Tensile Strength at Break, JRF- 72 hrs @ 60°C, and 72 hrs @ 49°C, and 7 days @ 121°C
Tensile Strength at Break, JRF-14 days
Tensile Strength at Break, JRF-7 days
Elongation at Break, AMS-S-8802, JRF- 72 hrs @ 60°C, and 72 hrs @ 49°C, and 7 days @ 121°C
Elongation at Break, AMS-S-8802, 24 hrs @ 121°C, and JRF-7 days @ 60°C
Elongation at Break, AMS-S-8802, Standard Cure - 14 days
Elongation at Break, AMS-S-8802, JRF-7 days
Elongation at Break, AMS-S-8802, JRF-14 days
Maximum Service Temperature, Air, cured 14 days @ 50% RH
Maximum Service Temperature, Air, Short term, cured 14 days @ 50% RH
Minimum Service Temperature, Air, 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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