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HomeOwner ShopShop SuppliesFuel Tank SealantAC Tech 645B-2 Fuselage & Fuel Tank Cavity Sealant - 6 oz. Kit
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AC Tech 645B-2 Fuselage & Fuel Tank Cavity Sealant - 6 oz. Kit
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AC Tech 645B-2 Fuselage & Fuel Tank Cavity Sealant - 6 oz. Kit

Availability: Ready to Ship in 6 Business Days
International Orders
Part#: AC645B2-60Z
by AC Tech
Our Price: $40.99
$10.00Add the Manufacturer's Certification:
Material Safety Data Sheets (MSDS): MSDS1, MSDS2
Quantity:
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.
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Product Details
Unit Size : 6 oz
Shipping Weight : 1 pounds
Manufacturer P/N : AC645B-2-6OZ
Schedule B Code : 8803300010
Approvals : STM 40-107
Specifications
Typical Physical & Application Properties
Color
Base
Accelerator
Off-White
Black
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 +250°F (-55° to +121°C)
Low Temp. Flexibility No cracking, checking or loss of adhesion when tested at -65°F (-54°C)
Corrosion None
Repairability 12 piw / 100% cohesive failure to other STM 40-107 qualified sealants
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