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3M AC-275 Class B-4 Aerospace Sealant

Category Polymer , Thermoset
Manufacturer 3M
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF 3M AC-275 Class B-4 Aerospace Sealant.pdf
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Material Notes:
3M Aerospace Sealant AC-275 Class B is a high temperature two-component manganese dioxide cured, liquid polysulfide polymer sealants providing excellent fuel tank and fuselage seals. They have outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common o the aircraft industry. 3M AC-275 Class B Sealants maintain flexibility and bond strength on most metal substrates like aluminum, 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 1.64 g/cc
0.0592 lb/in³
cured 14 days @ 50% RH; AMS3276
Volatiles 3.0 %
3.0 %
Brookfield Viscosity 70000 - 160000 cP
70000 - 160000 cP
Accelerator, RVF #10 sp @ 2 rpm
1.00e+6 - 1.60e+6 cP
1.00e+6 - 1.60e+6 cP
Base, RVF #7 sp @ 2 rpm
Mechanical Properties Metric English Comments
Hardness, Shore A 60
60
cured 14 days @ 50% RH; AMS3276
Tensile Strength at Break 1.48 MPa
215 psi
JRF-12 days @ 60°C + 60 hrs @ 71°C + 6 hrs 82°C; AMS3276
1.65 MPa
239 psi
Std Heat Cycle; AMS3276
2.41 MPa
350 psi
Standard Cure - 14 days; AMS3276
2.48 MPa
360 psi
JRF-12 days @ 60°C + 60 hrs @ 71°C + 6 hrs 82°C + 24 hrs @ 49°C + Std Heat Cycle; AMS3276
Elongation at Break 100 %
100 %
Std Heat Cycle; AMS3276
155 %
155 %
JRF-12 days @ 60°C + 60 hrs @ 71°C + 6 hrs 82°C + 24 hrs @ 49°C + Std Heat Cycle; AMS3276
210 %
210 %
JRF-12 days @ 60°C + 60 hrs @ 71°C + 6 hrs 82°C; AMS3276
220 %
220 %
Standard Cure - 14 days; AMS3276
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 121 °C
250 °F
cured 14 days @ 50% RH
182 °C
360 °F
Short term, 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 2520 min
42.0 hour
Tack-Free Time
7200 min
120 hour
Shelf Life 9.00 Month

@Temperature <=26.7 °C
9.00 Month

@Temperature <=80.1 °F
Descriptive Properties Value Comments
Appearance Black
Accelerator
Gray
White
Base
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