PR-1428 Class A is a low adhesion sealant. It has a 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.
PR-1428 Class A is a two part, manganese dioxide cured, polysulfide compound. The uncured material is suitable for application by rush in thickness up to 25 mils. It cures at room temperature to form a removable seal to common aircraft substrates.
- BMS 5-37 - Type I Class A-1 - BOEING
- DHMS-S3.02 - CLASS A-2 - DE HAVILLAND INC.
- MIL-S-8784 - Class A-1/2 - MILITARY SPECIFICATION
- MIL-S-8784 - Class A-2 - MILITARY SPECIFICATION