PR-1770 Class B High Strength
Fuel Tank Sealant
Description
PR-1770 Class B is a high strength, aircraft integral fuel tank sealant. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 360°F (182°C). This material is designed for fillet sealing of 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-1770 Class B is a two-part, manganese dioxide cured PermapolŪ P-5 polysulfide compound. 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.
Technical Data Sheet for
PR-1770 Class B
Military Specification: AMS 3269
OEM Specification: MS 426
