Description

Trusted by MRO teams and aircraft engineers across the globe, PPG PR1428A-1/2 is the industry-standard sealant for fuel tank access doors. Used on everything from cutting-edge military jets to commercial airliners carrying millions of passengers annually. Its low-adhesion, brushable formula ensures easy removal during maintenance while delivering a reliable seal that withstands extreme temperatures and fuel exposure. Whether you’re facing routine checks or AOG emergencies, this Semkit-packaged solution simplifies application and meets the rigorous demands of the aviation industry. That’s why ground crews and engineers alike reach for PPG PR1428A-1/2 because safety, speed and precision matter.
Key Technical Specs for PPG PR1428A-1/2
Type: Two-part, manganese dioxide-cured polysulfide sealant
Class: A
Application: Brushable up to 25 mils (0.635mm) thickness
Service Temperature: −54°C (−65°F) to 121°C (250°F); intermittent up to 135°C (275°F)
Cure Profile: Room temperature cure; forms a resilient, flexible seal
Use Case: Designed for fuel tank access door sealing and form-in-place gaskets
Load-bearing: Not intended for structural load-bearing; optimized for sealing and removability
Approvals & Specifications for PPG PR1428A-1/2

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
Aircraft Manufacturer Specs (commonly referenced):

Boeing: BAC 5000 series
Airbus: AIMS 04-05-001
Lockheed Martin: LMA-MC001
Bombardier / Embraer: Often used under general fuel tank sealant specs
Typical Aircraft MRO / AOG Applications for PPG PR1428A-1/2
Fuel Tank Access Doors: Ensures a reliable seal that’s easily removable during inspections or repairs
FIP Gaskets: Used to fabricate custom gaskets in-situ
Routine Maintenance: Ideal for scheduled checks and unscheduled AOG events
Why It’s Critical to Stock:
Enables fast turnaround during AOG
Reduces downtime with easy application and removal
Supports compliance with OEM specs and safety protocols
Compatibility & Safety Notes for PPG PR1428A-1/2

Substrate Compatibility: Bonds well to aluminium, composites, and aircraft-grade materials
Safety: Classified as hazardous (UN1133); requires proper handling and storage
Shipping: Refrigerated shipping recommended for sea freight or transit over 7 days
Practicality for AOG/MRO: Quick application, reliable cure and easy removal make it ideal for fast-paced maintenance environments
Packaging & Procurement for PPG PR1428A-1/2 (matched to the Aerospheres page and common market packs)
Pack Size: 6 fl oz (177.44ml) Semkit
Product Code: 1-ea-S654
Colour: Black
Stock Status: 563 units in UK stock, additional 672 available to order
Country of Origin: United States
Why PPG PR1428A-1/2 is Chosen for AOG / MRO

Speed: Brushable and easy to apply in the field
Reliability: Withstands fuel exposure and temperature extremes
Flexibility: Removable seal allows for repeated maintenance cycles
Compliance: Meets aviation-grade specifications across multiple OEMs
Practical Suggestions for Your Team (AOG mindset) for PPG PR1428A-1/2
Keep a buffer stock of at least 24 units for rapid deployment
Store in temperature-controlled environments to preserve shelf life
Train ground crew on Semkit mixing and brush application for efficiency
Include in AOG kits for fuel system servicing
Manufacture / Aviation Spec Codes for PPG PR1428A-1/2

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