PR-1440 Class A – B are an aircraft integral fuel tank sealant. It has service temperature range from -65°F (-54°C) to 250°F (121°C), with this intermittent excursions up to 275° (135°C). This material is designed for brush sealing of fasteners in fuel tanks and other aircraft fuselage sealing applications. The cured sealant maintains excellent elastomeric properties after prolonged exposure to both jet fuel and aviation gas.
PR-1440 Class A -B are a two-part, manganese dioxide cured polysulfide compound. The uncured material is suitable for application by brush in thickness up to 25 mils. It cures at room temperature to form a resilient sealant having excellent adhesion to common aircraft substrates.
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Specifications |
AMS-S-8802 TYPE II |
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Category |
Aircraft Sealants, Best Sellers |
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Product Type |
Fuel Tank Sealant
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Too See PR-1440 Fuel Tank Sealant – 6oz Semkit™ technical data sheet (TDS) and the PR-1440 Fuel Tank Sealant – 6oz Semkit™ safety data sheet (SDS). Visit here
PR-1440 is a two-part, manganese dioxide-cured polysulfide compound designed for sealing aircraft fuel tanks and fuselages. It provides an excellent barrier against aviation gasoline and jet fuel, ensuring a pressure-tight seal that remains flexible even after prolonged exposure to extreme temperatures and high-vibration environments.
A brush-consistencies liquid used for brush-sealing fasteners.
Class C: A lighter consistency used for faying surface sealing (interfay), typically applied by roller or brush.
PR-1440 is qualified to the AMS-S-8802 (formerly MIL-S-8802) and AMS 3276 specifications. These standards ensure the sealant maintains its integrity and adhesion when in contact with jet fuels (JP-4, JP-5, JP-8) and aviation gasoline across a wide temperature range.
For the common PR-1440 B-2 grade, the application life is 2 hours at standard conditions (25°C). It typically reaches a tack-free state in 24 hours and achieves a full cure within 7 to 14 days, depending on the ambient temperature and humidity levels.
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