PPG PR1829B-1/4 (1-S654)

Additional Product Information

Overview

PR-1829 Class B is a rapid-curing, two-part epoxy-cured Permapol P-3 polythioether sealant designed for aircraft windshield, canopy, and structural glazing applications. Widely used across aviation manufacturing and MRO environments, it delivers dependable adhesion, fast curing in low temperatures, and strong resistance to UV, weather, and aviation fluids making it a trusted solution for maintenance teams and OEM assembly operations.

Key Technical Specs for PR-1829 Class B

• Type: Two-part epoxy-cured polythioether aircraft sealant
• Color: Part A Black, Part B White, Mixed Gray
• Consistency: Low-sag thixotropic paste for extrusion gun or spatula
• Mix Ratio (by weight): 12.5 : 100
• Base Viscosity: 16,000 poise (1600 Pa s)
• Application Life: Up to 2 hours (grade dependent)
• Tack Free Time: <2 16 hours
• Ultimate Cure Hardness: Shore A 45
• Tensile Strength: 411 psi (2834 kPa)
• Peel Strength: Up to 55 pli (245 N/25 mm)
• Elongation: Up to 283%
• Service Temperature: ?80 F to 320 F (?62 C to 160 C), excursions to 420 F (216 C)
• Typical Uses: Aircraft windshield and canopy fillet sealing, glazing, structural sealing
• Shelf Life: 9 months below 80 F (27 C)

Approvals & Specifications

• MIL-G-25667 (Glass adhesion)
• MIL-P-8184 (Acrylic adhesion)
• MIL-P-83310 (Polycarbonate adhesion)
• AMS 2629 JRF immersion testing
• AMS 2471 (Anodized aluminum)
• AMS 4901 (Titanium)
• AMS 5516 (Stainless steel)
• MIL-C-5541 (Alodine aluminum)
• MIL-C-27725 (IFT coating)
• SAE AIR 4069 surface preparation guidance

Typical Aircraft MRO / AOG Applications

• Aircraft windshield and canopy sealing
• Fillet sealing of glass, acrylic, and polycarbonate panels
• Structural glazing and fuselage window installations
• Aircraft repair and refurbishment projects
• Sealing joints exposed to UV, weather, and aviation fuels

Compatibility & Safety Notes

• Compatible with glass, acrylic, polycarbonate, aluminum, titanium, and stainless steel
• Use approved adhesion promoter when required for primed substrates
• Clean surfaces with approved solvents and lint-free cloths before application
• Follow MSDS guidance and use appropriate PPE during handling
• For industrial aviation use only; avoid prolonged exposure

Packaging & Procurement

• Supplied in two-part Semco cartridges
• Designed for easy mixing and controlled application
• Store in original unopened containers below 80 F (27 C)
• Ideal for MRO stocking and field repair kits

Why PR-1829 Class B is Chosen for AOG / MRO

• Rapid cure reduces aircraft downtime
• Reliable adhesion across multiple aircraft substrates
• Performs in extreme temperature and environmental conditions
• Excellent repairability for long-term maintenance cycles
• Solvent-free formulation protects sensitive glazing materials

Practical Suggestions for Your Team (AOG Mindset)

• Stock cartridges for quick AOG response and field repairs
• Train technicians on proper mixing ratio and surface prep
• Pair with approved adhesion promoter for critical substrates
• Store in temperature-controlled environments to maximize shelf life

Manufacture / Aviation Spec Codes

• Manufacturer: PRC-DeSoto / PPG Aerospace
• Product ID: PR-1829 Class B
• Chemistry: Permapol P-3 Polythioether
• Compliance: Multiple MIL and AMS aerospace specifications

Alternative Names & Descriptions

• PR-1829 Class B Windshield Sealant
• PRC-DeSoto PR-1829B Sealant
• Permapol P-3 Windshield & Canopy Sealant
• Aircraft Glazing Fillet Sealant PR-1829
• Two-Part Aerospace Polythioether Windshield Sealant