3M AC-350 Class C-8(24) Aerospace Sealant

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3M AC-350 Class C-8(24) Aerospace Sealant
Categories:	Polymer; Thermoset; Polysulfide Sealant/Adhesive
Material Notes:	3M Aerospace Sealant AC-350 Class C are fast-cure, intermediate density polysulfide sealant suitable fro fuel tank and fuselage applications. These two-component, manganese dioxide cured sealant have resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to other aircraft industry. 3M AC-350 Class C Sealants maintain 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 flowable, faying surface grade material easily applied by brush, roller, spatula, or extrusion gun. The sealant 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	5.0 %	5.0 %
Brookfield Viscosity	200000 - 350000 cP	200000 - 350000 cP	Base, RVF #7 sp @ 2 rpm

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	50 - 55	50 - 55	cured 14 days @ 50% RH
Shear Strength	1.65 MPa @Time 1.21e+6 sec	240 psi @Time 336 hour	Graphite Bismaleimide (BMI) composite IM7/5250-4
	1.86 MPa @Time 346000 sec	270 psi @Time 96.0 hour	AMS4911 Titanium
Peel Strength	6.49 kN/m @Temperature 60.0 °C, Time 605000 sec	37.0 pli @Temperature 140 °F, Time 168 hour	in JRF, Graphite/BMI
	6.66 kN/m @Temperature 60.0 °C, Time 605000 sec	38.0 pli @Temperature 140 °F, Time 168 hour	in JRF, MIL-C-27725
	6.84 kN/m @Temperature 60.0 °C, Time 605000 sec	39.0 pli @Temperature 140 °F, Time 168 hour	in JRF/SW, Graphite/BMI
	7.19 kN/m @Temperature 60.0 °C, Time 605000 sec	41.0 pli @Temperature 140 °F, Time 168 hour	in JRF, MIL-C-5541
	7.36 kN/m @Temperature 60.0 °C, Time 605000 sec	42.0 pli @Temperature 140 °F, Time 168 hour	in JRF/SW, MIL-C-27725
	7.36 kN/m @Temperature 60.0 °C, Time 605000 sec	42.0 pli @Temperature 140 °F, Time 168 hour	in JRF/SW, MIL-PRF-85582
	7.89 kN/m @Temperature 60.0 °C, Time 605000 sec	45.0 pli @Temperature 140 °F, Time 168 hour	in JRF/SW, MIL-C-5541
	7.89 kN/m @Temperature 60.0 °C, Time 605000 sec	45.0 pli @Temperature 140 °F, Time 168 hour	in JRF, AMS 4911 Titanium
	7.89 kN/m @Temperature 60.0 °C, Time 6.05e+6 sec	45.0 pli @Temperature 140 °F, Time 1680 hour	in JRF/SW, AMS 4911 Titanium
	7.89 kN/m @Temperature 60.0 °C, Time 605000 sec	45.0 pli @Temperature 140 °F, Time 168 hour	in JRF, MIL-PRF-85582
	8.24 kN/m @Temperature 60.0 °C, Time 605000 sec	47.0 pli @Temperature 140 °F, Time 168 hour	in JRF/SW, AMS 4911 Titanium
	9.99 kN/m @Temperature 60.0 °C, Time 6.05e+6 sec	57.0 pli @Temperature 140 °F, Time 1680 hour	in JRF, AMS 4911 Titanium

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	5760 min	96.0 hour
Tack-Free Time	5760 min	96.0 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

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