3M AC-350 Class A-2 Aerospace Sealant

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3M AC-350 Class A-2 Aerospace Sealant
Categories:	Polymer; Thermoset; Polysulfide Sealant/Adhesive
Material Notes:	3M Aerospace Sealant AC-350 Class A are fast-cure, intermediate density two-component, manganese dioxide cure, brushable, polysulfide fuel tank and fuselage sealants. 3M AC-350 Class A Sealants have outstanding resistance to aviation gasoline a jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. 3M AC-350 Class A 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 pourable liquid easily applied by brush or roller. It has excellent 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	12 %
Brookfield Viscosity	25000 - 50000 cP	Base, RVF #6 sp @ 10 rpm

Mechanical Properties	Original Value	Comments
Hardness, Shore A	48 - 53	cured 14 days @ 50% RH
Tensile Strength at Break	2.21 MPa	JRF- 72 hrs @ 60°C, and 72 hrs @ 49°C Air Drying, and 7 days @ 121°C
	2.41 MPa	Standard Heat Cycle +JRF - 7 days @ 60°C
	2.76 MPa	Standard Cure
	1.59 MPa @Temperature 60.0 °C	JRF-14 days
	2.41 MPa @Treatment Temp. 182 °C, Time 28800 sec
Elongation at Break	80 %	Standard Heat Cycle +JRF - 7 days @ 60°C
	150 %	JRF- 72 hrs @ 60°C, and 72 hrs @ 49°C Air Drying, and 7 days @ 121°C
	350 %	Standard Cure
	340 % @Temperature 60.0 °C	JRF-14 days
	100 % @Treatment Temp. 182 °C, Time 28800 sec

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	12.0 hour
Tack-Free Time	8.00 hour
Shelf Life	9.00 Month @Temperature <=26.7 °C

Descriptive Properties
Appearance	Dark Brown	Accelerator
	Light Gray
	White	Base

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PMM35383 / 170130

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