3M AC-350 Class C-2 Aerospace Sealant

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3M AC-350 Class C-2 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	Original Value	Comments

Density	<= 1.40 g/cc	cured 14 days @ 50% RH
Volatiles	5.0 %
Brookfield Viscosity	200000 - 350000 cP	Base, RVF #7 sp @ 2 rpm

Mechanical Properties	Original Value	Comments
Hardness, Shore A	50 - 55	cured 14 days @ 50% RH
Shear Strength	240 psi @Time 1.21e+6 sec	Graphite Bismaleimide (BMI) composite IM7/5250-4
	270 psi @Time 346000 sec	AMS4911 Titanium
Peel Strength	37.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF, Graphite/BMI
	38.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF, MIL-C-27725
	39.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF/SW, Graphite/BMI
	41.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF, MIL-C-5541
	42.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF/SW, MIL-C-27725
	42.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF/SW, MIL-PRF-85582
	45.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF/SW, MIL-C-5541
	45.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF, AMS 4911 Titanium
	45.0 pli @Temperature 60.0 °C, Time 6.05e+6 sec	in JRF/SW, AMS 4911 Titanium
	45.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF, MIL-PRF-85582
	47.0 pli @Temperature 60.0 °C, Time 605000 sec	in JRF/SW, AMS 4911 Titanium
	57.0 pli @Temperature 60.0 °C, Time 6.05e+6 sec	in JRF, AMS 4911 Titanium

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	121 °C	cured 14 days @ 50% RH
	182 °C	Short term, cured 14 days @ 50% RH
Minimum Service Temperature, Air	-54.0 °C	cured 14 days @ 50% RH

Processing Properties	Original Value	Comments
Cure Time	8.00 - 9.00 hour
Tack-Free Time	6.00 - 7.00 hour
Shelf Life	9.00 Month @Temperature <=26.7 °C

Descriptive Properties
Appearance	Brown	Accelerator
	Dark Gray
	Off White	Base

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PMM35391 / 170138

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