PPG Hump Seal Repair Kits

Why Choose PPG Hump Seal Repair Kits?

• Complete Solution – Everything needed for professional repairs in one kit
• No Windshield Removal – Efficient repairs without costly disassembly
• Aircraft-Specific – Tailored kits for major manufacturers and models
• Moisture Protection – Prevents water ingress and associated damage
• Premium Materials – High-performance polysulfide sealants included
• Cost-Effective – Fraction of windshield replacement cost
• Minimized Downtime – Quick repairs keep aircraft operational

Understanding Hump Seals

Critical Protection for Aircraft Windshields

What is a Hump Seal?

The hump seal, also known as the outboard moisture seal or weather seal, is a critical aerodynamic and protective component located at the exterior interface between the aircraft windshield and fuselage. This specialized seal serves multiple essential functions in aircraft operations.

Primary Functions:

1. Moisture Barrier

• Prevents water ingress into windshield assembly
• Protects against rain, snow, and condensation
• Blocks humidity from entering laminate layers
• Shields windshield heating system connections

2. Aerodynamic Performance

• Creates smooth airflow transition
• Reduces drag and turbulence
• Improves fuel efficiency
• Minimizes noise and vibration

3. Structural Protection

• Seals gap between windshield and frame
• Prevents foreign object debris entry
• Protects mounting hardware
• Maintains windshield retention integrity

4. System Preservation

• Shields electrical heating elements
• Protects wiring connections
• Prevents corrosion of metal components
• Maintains deicing/anti-icing functionality

Consequences of Damaged Hump Seals

Moisture-Related Damage:

❌ Windshield Delamination – Water ingress causes laminate layers to separate
❌ Interlayer Degradation – Moisture deteriorates PVB or urethane interlayers
❌ Optical Distortion – Delamination creates visual impairment
❌ Heating System Failure – Water damages electrical elements
❌ Corrosion – Moisture corrodes metal frames and fasteners
❌ Reduced Service Life – Accelerated windshield aging and failure

Operational Impact:

• Expensive windshield replacement
• Extended aircraft downtime
• Safety concerns from impaired visibility
• Regulatory compliance issues
• Increased maintenance costs
• Reduced aircraft value

Why Hump Seals Fail:

• UV exposure and weathering
• Temperature cycling and thermal stress
• Mechanical damage during maintenance
• Age-related material degradation
• Improper installation or repair
• Chemical exposure from cleaners or fluids

Technical Advantages

No Windshield Removal Required

Traditional Method:

• Remove windshield assembly - Costly & Troublesome
• Risk of windshield damage during removal
• Extended downtime (3-5 days minimum)
• Specialized tooling and fixtures required
• Recalibration of systems after reinstallation
  

PPG Hump Seal Repair Kit:

• Repair in place without removal
• Minimal risk to windshield
• Quicker turnaround (4-8 hours + cure time)
• Standard tools only

Why PPG Hump Seal Repair Kits Stand Apart

✓ Aircraft-Specific Engineering – Tailored kits for major manufacturers
✓ Complete Solution – Everything needed in one comprehensive kit
✓ No Removal Required – Efficient in-place repairs
✓ Premium Materials – Aviation-grade polysulfide sealants
✓ Cost-Effective – 95%+ savings vs. windshield replacement
✓ Proven Performance – Trusted by airlines, MROs, and business aviation
✓ Technical Support – Expert guidance for successful repairs