PR-1428 Class B is a low adhesion sealant. It has a service temperature range from -65° F (-54°C) to 250° F (121°C), with intermittent excursions up to 275° F (135° C). The material is designed for use as an access door sealant or in the fabrication of form-in-place (FIP) Gaskets. It can be used to protect electrical wires, terminals and equipment against fuel, moisture, dirt and short circuits.
PR-1428 Class B is a two part, manganes 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 to common aircraft substrates.
Application life and cure time for B-1/2:
|Application life and cure time @ 77°F (25°C), 50% RH||Hours|
|Tack free time||<4|
|Cure time to 20 A Durometer||10|