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HomeShop SuppliesAdhesives, Tapes, & SealantsSealantsFuel Tank Sealants3M Aerospace AC-645 B-2 Fuselage & Fuel Tank Sealant - 6 oz Kit
3M Aerospace AC-645 B-2 Fuselage & Fuel Tank Sealant - 6 oz Kit
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3M Aerospace AC-645 B-2 Fuselage & Fuel Tank Sealant - 6 oz Kit

Part#: 051141-58138
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Currently Non-Orderable - Pricing Not Available
Country of Origin: USA
International Orders
Material Safety Information
Material Safety Data Sheet: MSDS1
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This low density, two-component, manganese dioxide cured liquid polysulfide polymer system that is suitable for use in fuel tank, fuselage hole filling, cavity filling and fuel tank filleting applications. It has outstanding resistance to jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. AC-645 Class B maintains its flexibility and bond strength on most metal substrates such as aluminum, titanium, steel, stainless steel, and many coatings under the extremes of temperature, weathering and stress. The mixed compound is a thixotropic paste easily applied by extrusion gun or spatula. It has excellent tooling properties.
Product Details
UOM : Kit
Size : 6 oz
Shipping Weight : 1 pounds
Manufacturer P/N : 051141-58138
Schedule B Code : 3214.10.0010
Approvals : STM 40-107
Disclaimer: While reasonable efforts have been made to ensure all information on this website is accurate, and Styles Logistics, Inc. do not assume responsibility for any errors or omissions. All specifications, illustrations, data and prices are subject to change without notice.
Typical Physical & Application Properties

Mixing Ratio (by weight) 100 base / 10 accelerator
Nonvolatile Content 97%
Base Viscosity (Brookfield #7 Spindle @ 2 RPM) 8,000 - 12,000 poise
Application Life 2 hours
Typical Tack-Free Time 6-7 hours
Typical Cure Time 2-4 hours

Typical Properties of Cured Compound (AMS-S-83318)
Color Black
Specific Gravity 1.07
Hardness 55 Shore A
Service Temperatures -65 to +250F (-55 to +121C)
Low Temp. Flexibility No cracking, checking or loss of adhesion when tested at -65F (-54C)
Corrosion None
Repairability 12 piw / 100% cohesive failure to other STM 40-107 qualified sealants
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