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Approvals and Conformities
Boeing PN/Spec#
BMS 5-142H, Type II, Class B-2
Alternate PN#s
AC-770, B-2, AC770B2, 70-0052-0452-7, 70005204527, 051141-58256
Product Attributes
![](/content/flags/flag-of-united-states.png)
United States
Size
3.5 oz
Shipping Weight
0.75 pounds
ECCN
EAR99
Color Family
Brown
Manufacturer P/N
7100094350
Schedule B Code
3214.10.0010
Pack Quantity
1
Ship Dimensions
13 x 2 x 2 inches
Size
3.5 oz Kit
Spec
BMS 5-142G Type II, Class B-2
Color
Brown
AC-770 Class B is a fast cure, low density two-component, manganese dioxide cure, polysulfide fuselage sealant. AC-770 has outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. AC-770 Class B 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, and exhibits superb tooling properties.