| PR-1773 Class B is a low-tack, chromate-free corrosion inhibitive sealant. It has a service temperature range of -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 300°F (149°C). The material is designed to act as an effective barrier against the common causes of corrosion on aluminum alloys or between dissimilar metals. PR-1773 Class B is a two-part, manganese dioxide cured 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 removable seal on common aircraft substrates. |
