3M AC-350 Class B-6 Aerospace Sealant

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3M AC-350 Class B-6 Aerospace Sealant
Categories:	Polymer; Thermoset; Polysulfide Sealant/Adhesive
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 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
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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 @Treatment Temp. 182 °C, Time 28800 sec	331 psi @Treatment Temp. 360 °F, Time 8.00 hour
	2.55 MPa @Treatment Temp. 121 °C, Time 605000 sec	370 psi @Treatment Temp. 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 % @Treatment Temp. 182 °C, Time 28800 sec	100 % @Treatment Temp. 360 °F, Time 8.00 hour
	125 % @Treatment Temp. 121 °C, Time 605000 sec	125 % @Treatment Temp. 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	2880 min	48.0 hour
Tack-Free Time	2880 min	48.0 hour
Shelf Life	9.00 Month @Temperature <=26.7 °C	9.00 Month @Temperature <=80.1 °F

Descriptive Properties
Appearance	Brown		Accelerator
	Dark Gray
	Off White		Base

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

PMM35388 / 170135

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