PPG PR1428B-1/2 (100-ml-Semkit)

Additional Product Information

Overview

PR-1428 Class B is a low-adhesion, fuel-resistant polysulfide sealant designed for aerospace sealing applications where removability is essential. Commonly used for fuel access doors and form-in-place (FIP) gaskets, it provides a reliable seal while allowing for easier disassembly during maintenance.

This two-part, manganese dioxide-cured compound is formulated as a thixotropic, low-sag paste, making it easy to apply using an extrusion gun or spatula. Once cured at room temperature, it forms a durable yet removable seal that performs across a wide range of aircraft substrates.

In addition to sealing applications, PR-1428 Class B is also used to protect electrical wiring, terminals, and equipment from fuel, moisture, dirt, and potential short circuits, making it a versatile choice for both structural and protective uses in aviation environments.

Key Technical Specs for PR-1428 Class B

• Type: Two-part, manganese dioxide-cured polysulfide sealant
• Application: Low-adhesion, removable sealing compound
• Consistency: Thixotropic, low-sag paste
• Application Method: Extrusion gun or spatula
• Service Temperature Range: -65 F (-54 C) to 250 F (121 C)
• Intermittent Temperature Resistance: Up to 275 F (135 C)
• Cure: Room temperature curing
• Adhesion: Designed for easy removal from substrates

Approvals & Specifications

• Industry Classification: Aerospace fuel-resistant sealant
• Typical Use Standard: Fuel system sealing and removable gasket applications

Typical Aircraft MRO / AOG Applications

• Fuel access door sealing
• Form-in-place (FIP) gasket creation
• Sealing removable panels and access points
• Protection of electrical wiring, terminals, and components
• Barrier against fuel, moisture, dirt, and contaminants

Compatibility & Safety Notes

• Compatibility: Suitable for common aircraft substrates including metals and treated surfaces
• Safety Notes: Use appropriate PPE during application; ensure adequate ventilation during curing
• Designed for applications requiring seal removability without substrate damage

Packaging & Procurement

• Available in standard aerospace sealant kits
• Compatible with common sealant application tools
• Suitable for both line maintenance and workshop use

Why PR-1428 Class B is Chosen for AOG / MRO

• Provides reliable sealing with easy removal for maintenance access
• Fuel-resistant and durable across wide temperature ranges
• Simple application with consistent performance
• Versatile use across sealing and protective applications

Practical Suggestions for Your Team (AOG Mindset)

• Use where frequent access or inspection is required
• Apply evenly to ensure consistent sealing performance
• Store kits properly to maintain optimal working characteristics

Manufacture / Aviation Spec Codes

• Product: PR-1428 Class B
• Type: Polysulfide aircraft sealant

Alternative Names & Descriptions

• PR1428 Class B Sealant
• Aircraft Removable Fuel Sealant
• Polysulfide FIP Gasket Sealant
• Low Adhesion Aerospace Sealant
• Fuel Access Door Sealant