PPG Aerospace/PRC DeSoto® Class B Access Door Sealant Cartridge, 6oz PR1428B2

This 6 oz cartridge of low-adhesion sealant is designed for access doors and form-in-place gaskets. It withstands temperatures from -65°F to 250°F and protects electrical components from moisture and dirt. The thixotropic paste is easy to apply and cures at room temperature, forming a removable seal on common aircraft substrates.

WARNING: This product can expose you to chemicals including carbon black (airborne, unbound particles of respirable size [= 10 micrometers]) and titanium dioxide (airborne, unbound particles of respirable size), which are known to the State of California to cause cancer. For more information visit www.P65Warnings.ca.gov.

Overview

PR-1428 Class B is a low-adhesion sealant. It has a service temperature range of -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 also be used to protect electrical wires, terminals and equipment against fuel, moisture, dirt and short circuits. 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 on common aircraft substrates. Each 6 oz cartridge contains approximately 3.5 oz of sealant.

Features & Benefits

• Low adhesion designed for easy removal during maintenance
• Two-part, manganese dioxide-cured polysulfide compound
• Low-sag paste consistency suitable for fillet sealing
• Protects electrical wires, terminals and equipment
• Allows reusable access without damaging sealed components
• Suitable as an access door sealant, FIP gasket or protective potting material
• Effective from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 275°F (135°C)

Specifications

• BMS 5-37 – Type 1 Class B-1/2 – Boeing
• BMS 5-37 – Type I Class B-2 – Boeing
• DHMS-S3.02 – B-1/2 – De Havilland Inc.
• DHMS-S3.02 – Class B-2 – De Havilland Inc.
• MEP 09-082 – Class B-1/2 – Embraer
• MEP 09-082 – Class B-2 – Embraer
• MIL-S-8784 – Class B-1/2 – Military Specification
• MIL-S-8784 – Class B-2 – Military Specification

Technical Information

• Part A: Black
• Part B: Red
• Mixed: Dark red
• Cured specific gravity: 1.50