PPG PR-148 Blue AMS 3100 Class 1 Type 1 Adhesion Promoter for Aerospace Sealing

PPG PR-148 Blue is a premium adhesion promoter qualified to AMS 3100 Class 1, Type 1 specification, designed to maximize sealant bond performance on aircraft metal and composite surfaces. The distinctive blue tint provides a clear visual indicator of complete and uniform promoter coverage during application, making it the preferred choice for quality-critical sealing operations where coverage verification is essential.

Formulated for compatibility with polysulfide and polythioether aerospace sealants, PR-148 Blue creates a robust molecular adhesion bridge between the prepared substrate and the sealant polymer, dramatically improving peel and lap shear strength compared to unseeded surfaces. Its AMS 3100 qualification ensures it meets the most stringent aerospace adhesion promoter requirements for use in fuel tank, pressure vessel, and structural sealing applications.

The 2 oz glass bottle size is ideal for small repair jobs, touch-up sealing operations, and applications where minimal material usage is required. Its small format reduces waste and is convenient for technicians performing spot repairs in confined aircraft zones.

Product Specifications

Technical Information

The blue colorant in PPG PR-148 Blue serves an important functional purpose beyond aesthetics — it allows quality inspectors and applicators to visually verify that complete, uniform coverage has been achieved across the entire bonding surface before sealant application proceeds. Any missed areas, holidays, or thin spots are immediately visible as lighter or uncolored zones in the blue promoter film, enabling corrective action before the sealant is applied.

The active adhesion-promoting chemistry in PR-148 Blue is identical to the clear version, providing the same level of adhesion improvement and AMS 3100 specification compliance. The promoter molecule contains functional groups that react with both the metal oxide or composite surface and the sealant polymer chains, forming a stable, hydrolysis-resistant bond layer that maintains adhesion integrity throughout the sealant service life.

Application should follow the approved surface preparation sequence including cleaning, deoxidizing, and conversion coating per the applicable sealant specification before PR-148 Blue is applied. Flash-off time must be observed before applying the sealant topcoat. Refer to the PPG PR-148 technical data sheet for flash-off times at various temperatures and humidity levels.

Why Choose PPG PR-148 Blue?

• ✅ AMS 3100 Class 1 Type 1 Qualified — Meets top-tier aerospace adhesion promoter specification
• ✅ Blue Tint for Visual Verification — Easy quality inspection of coverage completeness
• ✅ Maximizes Sealant Adhesion — Critical for fuel tank and structural joint integrity
• ✅ Convenient 2 oz Size — Ideal for small repairs and spot sealing operations
• ✅ PPG Aerospace Trusted Brand — Globally approved for commercial and military aircraft

Applications and Compatible Aircraft

PPG PR-148 Blue is used in fuel tank sealing, window and windshield bonding, pressure bulkhead joints, and structural sealing on commercial and military aircraft. Compatible with Boeing, Airbus, Bombardier, Embraer, and military platforms where AMS 3100 qualified adhesion promoters are specified.

Frequently Asked Questions

Q: What is the difference between PR-148 Clear and PR-148 Blue?
A: The chemistry and performance are identical. The blue version contains a colored indicator for visual coverage verification, making it preferred for quality-critical applications where complete surface coverage must be confirmed before sealant application.

Q: What spec does PPG PR-148 Blue meet?
A: PR-148 Blue meets AMS 3100 Class 1 Type 1 specification. MPN: 0148XXXAM002BT.