PR-1782 Class B is a low density aircraft fuel tank and general purpose sealant. Service temperature range is -54 ° C to 121 ° C (-65 ° F to 250 ° F). This material is designed for fillet sealing and other aircraft hull sealing applications. It provides thirty percent weight savings per unit volume compared to conventional sealants used for these purposes. The cured sealant retains excellent elastomeric properties after prolonged exposure to both jet fuel and aircraft gas and resists limited contact with diphosphate ester-based hydraulic fluids.

PR-1782 Class B is a two component, manganese dioxide cured polysulfide sealant. Uncured material is a low sag, thixotropic putty suitable for application by extrusion gun or spatula. It cures at room temperature to form a flexible sealant with excellent adhesion to common aircraft surfaces.