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3M AC-350 Class B-1/4 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-350 Class B-1/4 Aerospace Sealant.pdf
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Material Notes:
3M Aerospace Sealant AC-350 Class B are fast-cure, intermediate density polysulfide sealant suitable fro fuel tank and fuselage applications. These two-component, manganese dioxide cured sealant are solvent free and 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-350 Class B Sealants maintain flexibility and bond strength on most metal substrates such as aluminum, titanium, steel, stainless steel, glass, 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 good tooling properties.Information provided by 3M
Physical Properties Metric English Comments
Density <= 1.40 g/cc
<= 0.0506 lb/in³
cured 14 days @ 50% RH
Volatiles 2.0 %
2.0 %
Brookfield Viscosity 900000 - 1.20e+6 cP
900000 - 1.20e+6 cP
Base, RVF #7 sp @ 2 rpm
Mechanical Properties Metric English Comments
Hardness, Shore A 50 - 55
50 - 55
cured 14 days @ 50% RH
Tensile Strength at Break 1.51 MPa
219 psi
Standard Heat cycle + JRF-12 days @ 60°C, 60 hrs @ 71°C, 6 hrs @ 82°C + 24 hrs at 49°C
1.65 MPa
239 psi
24 hrs @ 121°C, and JRF-7 days @ 60°C
1.79 MPa
260 psi
Standard Cure-14 days
1.38 MPa

@Temperature 60.0 °C
200 psi

@Temperature 140 °F
JRF-14 days
2.28 MPa

@Temperature 182 °C,
Time 28800 sec
331 psi

@Temperature 360 °F,
Time 8.00 hour
2.55 MPa

@Temperature 121 °C,
Time 605000 sec
370 psi

@Temperature 250 °F,
Time 168 hour
Elongation at Break 42 %
42 %
Standard Heat cycle + JRF-12 days @ 60°C, 60 hrs @ 71°C, 6 hrs @ 82°C + 24 hrs at 49°C
260 %
260 %
24 hrs @ 121°C, and JRF-7 days @ 60°C
500 %
500 %
Standard Cure-14 days
540 %

@Temperature 60.0 °C
540 %

@Temperature 140 °F
JRF-14 days
100 %

@Temperature 182 °C,
Time 28800 sec
100 %

@Temperature 360 °F,
Time 8.00 hour
125 %

@Temperature 121 °C,
Time 605000 sec
125 %

@Temperature 250 °F,
Time 168 hour
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 60.0 - 120 min
1.00 - 2.00 hour
Tack-Free Time
60.0 - 120 min
1.00 - 2.00 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 Gray
Off White
Base
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