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3M AC-770 Class B-2 Aerospace Sealant

Category Polymer , Thermoset
Manufacturer 3M
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF 3M AC-770 Class B-2 Aerospace Sealant.pdf
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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
Physical Properties Metric English Comments
Density 1.10 g/cc
0.0397 lb/in³
cured 14 days @ 50% RH
Volatiles 1.5 %
1.5 %
Brookfield Viscosity 950000 - 1.30e+6 cP
950000 - 1.30e+6 cP
Base, RVF #7 sp @ 2 rpm
Mechanical Properties Metric English Comments
Hardness, Shore A 42 - 48
42 - 48
cured 14 days @ 50% RH
Tensile Strength at Break 1.72 MPa

@Temperature 336 °C
249 psi

@Temperature 637 °F
Standard Cure in ASTM Fuel B in ASTM D471 Reference Fuel B
1.83 MPa

@Temperature 49.0 °C,
Time 173000 sec
265 psi

@Temperature 120 °F,
Time 48.0 hour
Elongation at Break 330 %
330 %
7 days @ 49°C in ASTM Fuel B 48 hrs @ 49°C
310 %

@Time 1.21e+6 sec
310 %

@Time 336 hour
Standard Cure in ASTM Fuel B in ASTM D471 Reference Fuel B
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 121 °C
250 °F
cured 14 days @ 50% RH
Minimum Service Temperature, Air -54.0 °C
-65.2 °F
cured 14 days @ 50% RH
Processing Properties Metric English Comments
Cure Time 420 - 480 min
7.00 - 8.00 hour
Tack-Free Time
540 - 660 min
9.00 - 11.0 hour
Shelf Life 9.00 Month

@Temperature <=26.7 °C
9.00 Month

@Temperature <=80.1 °F
Descriptive Properties Value Comments
Appearance Brown
Accelerator
Dark Brown
Off White
Base
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