PR-2050 Class B is a fast curing compound designed for aerodynamic leveling and gap filling applications. Service temperature range -65 ° F (-54 ° C) to 250 ° F (121 ° C) and intermittent exposure up to 400 ° F (204 ° C). This product has low shrinkage and cures to a sandable hardness of at least one hour at 25 ° C (77 ° F) or above. Once cured, the PR-2050 Class B remains flexible and reduces potential cracking problems that can occur with more brittle sealing compounds.

PR-2050 Class B, two component, epoxy cured. Permapol ®P-3.1 polythioether compound. Cured product will not deteriorate after limited exposure to jet fuel and aviation gas or limited contact with diphosphate ester-based hydraulic fluids. PR-2050 Class B exhibits excellent adhesion to a wide variety of suitably prepared aircraft surfaces.