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PR-1429 Class B is a low cohesive strength sealant. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 300°F (149°C). This material is designed for butt sealing between aircraft interior floor boards or for depression filling and smoothing applications. The cured sealant maintains excellent elastomeric properties after prolonged exposure to both jet fuel and aviation gas.
PR-1429 Class B is a two-part, manganese dioxide cured, Permapol® P-5 polysulfide compound. The uncured material is a low sag, thixotropic paste suitable for application by extrusion gun or spatula. This sealant has excellent adhesion to common aircraft substrates.
