PPG PR1428A-2 (1-ea-S654)

Additional Product Information

Overview

PPG PR1428A-2 is a two-part, manganese dioxide-cured polysulfide sealant engineered for aircraft fuel tank and access panel sealing where low adhesion is required. It provides reliable resistance to fuel, moisture, and environmental exposure while allowing controlled removal during inspections or maintenance. The Class A brushable consistency enables precise application for form-in-place gaskets and access door sealing. Supplied in a Semkit format, PR1428A-2 supports efficient mixing and application in both scheduled MRO tasks and urgent AOG scenarios.

Key Technical Specs

• Type: Two-part manganese dioxide-cured polysulfide sealant
• Application method: Brushable (Class A)
• Maximum application thickness: Up to 25 mils (0.635 mm)
• Operating temperature range: -65°F to 250°F (-54°C to 121°C)
• Short-term temperature excursion: Up to 275°F (135°C)
• Colour: Black
• Shelf life: 12 months from date of manufacture
• Packaging format: 6 oz (170 g) Semkit

Approvals & Specifications

• Referenced in Boeing service documentation for fuel tank access door sealing
• Not explicitly listed for Airbus or Lockheed Martin; Certificates of Conformance should be requested where required

Typical Aircraft MRO / AOG Applications

• Sealing fuel tank access doors and panels
• Form-in-place gasket fabrication
• Protection of electrical components from fuel and moisture ingress

Compatibility & Safety Notes

• Compatible with common aircraft substrates
• Intended for sealing applications only; not suitable for structural bonding
• Use in well-ventilated areas and follow SDS handling guidance

Packaging & Procurement

• Supplied in 6 oz (170 g) Semkit packaging
• Individually boxed with part number and lot traceability
• Follow hazardous material handling requirements for shipping and storage

Why Chosen for AOG / MRO

• Low adhesion allows easy removal during maintenance
• Proven performance in critical fuel-exposed areas
• Semkit format supports rapid deployment in urgent scenarios

Practical Suggestions for Your Team (AOG Mindset)

• Keep multiple Semkits in AOG kits for immediate use
• Train ground crew on proper mixing and application techniques
• Store in a cool, dry location to maintain shelf life

Manufacturer / Aviation Spec Codes

• Manufacturer P/N: 1428A002CA654SK
• Aerospheres Part Number: 100295
• UN Number: UN1133
• Hazard Class: Class 3
• Packing Group: II
• ECCN: EAR99

Alternative Names & Descriptions

• PPG PR1428A-2 Sealant
• PR-1428 Class A Sealant
• Fuel Tank Access Door Sealant
• Form-in-Place Gasket Sealant
• PR1428A-2
• PR1428A2-654 Semkit