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Goodfellow - Materials for Research and Industry - Small Quantities FAST
3M AC-770 Class B-2 Aerospace Sealant
Categories: Polymer; Thermoset

Material Notes: 3M Aerospace Sealant AC-770 Class B are fast cure, low density two-component, manganese dioxide cure, polysulfide fuselage sealants. 3M AC-770 Class B Sealants have outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. 3M AC-770 Class B Sealants maintain flexibility and bond strength on most metal substrates like aluminum, titanium, stainless steel, 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. They have excellent tooling properties.

Information provided by 3M

Available Properties
  • Density, cured 14 days @ 50% RH
  • Volatiles
  • Brookfield Viscosity, Base, RVF #7 sp @ 2 rpm
  • Hardness, Shore A, cured 14 days @ 50% RH
  • Tensile Strength at Break, Standard Cure in ASTM Fuel B in ASTM D471 Reference Fuel B
  • Tensile Strength at Break
  • Elongation at Break, 7 days @ 49°C in ASTM Fuel B 48 hrs @ 49°C
  • Elongation at Break, Standard Cure in ASTM Fuel B in ASTM D471 Reference Fuel B
  • Maximum Service Temperature, Air, 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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Aluminum Castings
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