PPG Aerospace® Learjet Hump Seal Repair Kit — Complete Aerodynamic Seal Restoration
Learjet-specific. Technician-ready. Extend your fleet's service life with confidence.
Developed by PPG's aviation experts exclusively for Learjet aircraft, this all-in-one hump seal repair kit empowers maintenance technicians to quickly restore critical seal functionality — protecting fuel efficiency, aerodynamic integrity, and the continued operational excellence of your Learjet fleet.
⚠️ Aviation Use Only: Engineered to meet rigorous aerospace industry standards. For use by qualified aircraft maintenance technicians only.
What's Included in the Kit
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Polysulfide Sealant
Aerospace-grade sealant formulated specifically for Learjet hump seal restoration
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Seal Forming Tool
Custom-designed for Learjet aircraft geometry for a precise, consistent seal profile
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Adhesion Promoter
Professional-grade primer ensuring maximum sealant bond strength on Learjet surfaces
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Application Tape
Ensures clean, defined edges for a professional finish every time
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Precision Razor Blades
For accurate trimming and surface preparation prior to sealing
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Technical Instructions
Clear, intuitive step-by-step guidance for efficient, consistent application
Why Choose This Kit?
Complete All-in-One Solution
Every component needed for a professional hump seal repair is included — no additional sourcing required, saving time and simplifying procurement.
Minimizes Aircraft Downtime
Streamlined repair process gets your Learjet back in service faster — reducing costly ground time for operators and charter fleets.
Cost-Effective Alternative
A more economical solution compared to traditional repair methods — delivering aerospace-quality results without the premium cost or extended lead times.
Intuitive for Technicians
Clear, step-by-step instructions simplify the repair process — enabling efficient implementation and consistent results across your maintenance team.
Meets Aerospace Standards
Engineered to meet rigorous aerospace industry requirements — ensuring safety, reliability, and regulatory confidence on every Learjet repair.
Restores Fuel Efficiency & Aerodynamics
Restoring hump seal integrity eliminates aerodynamic drag caused by seal damage — directly recovering fuel efficiency and flight performance.
Meets rigorous aviation industry safety and performance requirements
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Cost-Efficient Maintenance
Reduces repair costs and lead times vs. traditional methods
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Trusted for Business Jets
PPG Aerospace expertise trusted by Learjet operators and MROs worldwide
Tips for Best Results
✓ Thoroughly clean and dry the hump seal area before applying adhesion promoter
✓ Apply masking tape cleanly along seal edges before dispensing sealant for a professional finish
✓ Use the forming tool in one smooth, continuous stroke for a uniform seal profile
✓ Allow full sealant cure time before returning the aircraft to service — refer to the included technical instructions
✓ Store unused sealant components sealed and away from direct sunlight or extreme temperatures
⚠️ Safety & Compliance Notice: This product is intended for use by qualified aircraft maintenance technicians only. Always follow applicable Learjet Aircraft Maintenance Manual (AMM) procedures, safety protocols, and regulatory requirements before performing hump seal repairs.
PPG Aerospace® is a registered trademark of PPG Industries. Learjet® is a registered trademark of Bombardier Inc. Kit contents and configuration may vary by aircraft model.
Extend the service life of your aircraft with PPG's trusted aerospace maintenance solutions.
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