PPG PR1428A-1/2 (1-ea-S654)

Additional Product Information

Overview

PPG PR1428A-1/2 is an industry-standard, low-adhesion polysulfide sealant designed specifically for sealing aircraft fuel tank access doors. Trusted by MRO teams and aircraft engineers worldwide, it is used across commercial airliners and advanced military aircraft where safety, speed, and maintainability are critical. Its brushable, easily removable formulation allows repeated access during inspections and maintenance while maintaining a reliable seal under extreme temperature and fuel exposure conditions. Supplied in convenient Semkit packaging, PR1428A-1/2 simplifies application during routine maintenance and urgent AOG situations alike.

Key Technical Specs

• Type: Two-part, manganese dioxide-cured polysulfide sealant
• Class: A (low adhesion, removable)
• Application Method: Brushable up to 25 mils (0.635 mm) thickness
• Service Temperature Range: -65°F to 250°F (-54°C to 121°C), intermittent up to 275°F (135°C)
• Cure Profile: Room-temperature cure forming a resilient, flexible seal
• Primary Use: Fuel tank access doors and form-in-place (FIP) gaskets
• Load Bearing: Not intended for structural load-bearing applications

Approvals & Specifications

• UN Number: UN1133 (Hazardous Material)
• ECCN: EAR99
• Commodity Code: 32149000
• Shelf Life: 12 months (360 days)
• OEM Part Number: 1428A1/2CA654SK
• Manufacturer: PPG Aerospace / PRC-DeSoto

Common Aircraft Manufacturer References

• Boeing: BAC 5000 series
• Airbus: AIMS 04-05-001
• Lockheed Martin: LMA-MC001
• Bombardier / Embraer: General fuel tank sealant specifications

Typical Aircraft MRO / AOG Applications

• Sealing fuel tank access doors
• Form-in-place gasket fabrication
• Routine scheduled maintenance checks
• Rapid-response AOG fuel system servicing

Compatibility & Safety Notes

• Compatible with aluminium, composites, and aircraft-grade substrates
• Classified as hazardous (UN1133); proper handling and storage required
• Refrigerated shipping recommended for sea freight or transit exceeding 7 days
• Low-adhesion formulation supports fast removal during repeated maintenance cycles

Packaging & Procurement

• Pack Size: 6 fl oz (177.44 ml) Semkit
• Product Code: 1-ea-S654
• Colour: Black
• Country of Origin: United States

Why PPG PR1428A-1/2 is Chosen for AOG / MRO

• Brushable, field-friendly application
• Resistant to fuel exposure and temperature extremes
• Low-adhesion seal enables repeated access without damage
• Meets aviation-grade requirements across multiple OEM platforms

Practical Suggestions for Your Team (AOG Mindset)

• Maintain buffer stock to support rapid AOG deployment
• Store in temperature-controlled environments to preserve shelf life
• Train ground crews on Semkit mixing and brush application
• Include in dedicated AOG fuel system service kits

Manufacturer / Aviation Spec Codes

• Manufacturer: PPG Aerospace / PRC-DeSoto
• OEM Part Number: 1428A1/2CA654SK
• NSN: 8030-01-365-3914
• ECCN: EAR99
• UN Number: UN1133
• Schedule B Code: 3214100010
• Commodity Code: 32149000
• Country of Origin: United States

Alternative Names & Descriptions

• PR1428 Class A Sealant
• PPG PR1428A-1/2
• Semkit 654
• Fuel Tank Access Door Sealant
• Form-In-Place Gasket Sealant
• Low-Adhesion Polysulfide Sealant