Print | Products > Aerospace Sealants > Adhesion Promoters > PR-425 Primer Adhesion Promoters PR-425 Primer PR-425 is a primer to enhance the coupling characteristics of polyurethane compounds to metal surfaces. PR-425 is a two part compound suitable for application by brush. The material cures at temperatures down to 40°F (5°C) Safety Data Sheet (SDS) Technical Data Sheet Specifications * For specification information - contact AerospaceSealantsInfo@ppg.com Aerospace Adhesives Aerospace Sealants Adhesion Promoters Application Guides Corrosion Inhibitive Sealants Customized Sealant Solutions (CSS) Electrical Potting / Molding Electrically Conductive Fast Cure / Flight Line Repair Fuel Tank / High Performance Options Fuel Tank / Proven Standards High Temperature and Firewall Specialty Products Windshield and Canopy Industrial Sealants and Adhesives Aerospace Transparencies Transparent Armor and Specialty Products Aerospace Coatings, Pretreatments, Cleaners Chemical Management Engineered Materials Semco® Packaging Aerospace Academy Aerospace Sealants - Preformed PPG Livery Lab℠ Find Products Find Products Help Terms & Conditions