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Goodfellow - Materials for Research and Industry - Small Quantities FAST
3M AC-251 Black Class B-1 Aerospace Sealant
Categories: Polymer; Thermoset

Material Notes: 3M Aerospace Sealant AC-251 Black Class B are two-part, quick curing, polysulfide based canopy and windshield sealants. These products are formulated for sealing acrylic, glass, and polycarbonate aircraft canopies and windshields. 3M AC-251 Black Class B Sealants contain no solvents and do not craze. The sealants quickly cure and exhibit excellent adhesion and resistance to UV and weather exposure. 3M AC-251 Black Class B Sealants have a thixotropic, non-sag consistency. They can be readily applied with a spatula or extrusion gun on vertical surfaces.

Information provided by 3M

Available Properties
  • Density, AMS-S-8802, cured 14 days @ 50% RH
  • Volatiles
  • Brookfield Viscosity, Base, RVF #7 sp @ 2 rpm
  • Hardness, Shore A, AMS-S-8802, cured 14 days @ 50% RH
  • Tensile Strength at Break
  • Tensile Strength at Break, Standard Cure
  • Elongation at Break
  • Elongation at Break, Standard Cure
  • Maximum Service Temperature, Air, AMS-S-8802, cured 14 days @ 50% RH
  • Maximum Service Temperature, Air, AMS-S-8802, cured 14 days @ 50% RH
  • Minimum Service Temperature, Air, AMS-S-8802, cured 14 days @ 50% RH
  • Cure Time
  • Tack-Free Time
  • Shelf Life
Property Data

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