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PR-1428 Low Adhesion Access Door Sealant

Description

PR-1428 is a low adhesion access door 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.

Class ACollapse/Expand

PR-1428 Class A is a two-part, manganese dioxide cured, polysulfide compound. The uncured material is suitable for application by brush in thickness up to 25 mils.

It cures at room temperature to form a removable seal to common aircraft substrates.

Specifications

MIL-S-8784 DHMS-S3.02 WS26056

Technical Data Sheet for PR-1428 Class A (pdf)

Class BCollapse/Expand

PR-1428 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 to common aircraft substrates.

Specifications

BMS5-37 TY I MIL-S-8784 * DHMS-S3.02
5PTMUB06 CMNP022  

* Specification discontinued
Technical Data Sheet for PR-1428 Class B (pdf)

Standard PackagingCollapse/Expand

PR-1428 comes in the following packaged configuration:

  • Two-Part Can Kit packaged with part A and part B pre-measured into separate containers.
  • Pint Kit with 12 fl. oz. of sealant
  • Semkit® package - a complete package assembly that stores, mixes, and applies sealant. Semkit® packages eliminates the labor intensive task of measuring and handling materials, and prevents contamination when opening and closing can kits.
  • Model 654 Semkit® with 3-1/2 fl. oz. of sealant in a 6 oz. cartridge
  • Model 655 Semkit® with 2 fl. oz. of sealant in a 2-1/2 oz. cartridge
  • Other packaging configurations may be available.

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Specification information provided for reference purpose only. Review specification QPL for verification or consult with engineering services.