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PR-1776M Class B is a low density, high temperature aircraft
integral fuel tank sealant. It has a service temperature range from
-65°F (-54°C) to 250°F (121°C), with very limited excursions up to
360°F (182°C). This material is designed for fillet sealing of fuel
tanks and other aircraft fuselage sealing applications. It offers as
much as a twenty percent weight savings, per unit volume, over
traditional sealants used for these purposes. The cured sealant
maintains excellent elastomeric properties after prolonged exposure
to aircraft fuels both jet fuel and aviation gas, and will resist limited
contact to diphosphate ester based hydraulic fluids.
PR-1776M Class B is a two-part, manganese dioxide cured
Permapol® P-5 modified polysulfide. The uncured material is a low
sag, thixotropic paste suitable for application by extrusion gun or
spatula. It cures at room temperature to form a resilient sealant
having excellent adhesion to common aircraft substrates.
Features:
• Low Weight, 20% lower than standard sealants
• Faster Curing
• Easier to apply
• Excellent Adhesion to Titanium and Stainless Steel
• MnO2/Permapol® P-5 polysulfide
• Service temperature -65 to 250 degrees Fahrenheit
• Shelf Life: 9 months
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Covering Material - Fuel Tank Sealants