PR-1776® M Class B Low Weight Fuel Tank Sealant

PR-1776 M Class B sealant is a low density, high temperature aircraft fuel tank sealant with 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 two-part, manganese dioxide cured PERMAPOL® P-5 polysulfide compound is a low sag paste applied by extrusion gun or spatula and cures at room temperature.

Discover the Future of Flight

Have questions or need support for your aerospace project? Contact PPG’s aerospace team today for guidance and tailored solutions.

Product Details

PR-1776 M Class B sealant 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 upto 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 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-1776 M Class B sealant 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.