PPG PR1826B1/2-A1001 (100-ml-Semkit)

Additional Product Information

Overview

The PR-1826 Class B is a rapid-cure aircraft fuel tank sealant designed for use in aviation maintenance, repair, and overhaul (MRO). It is used for fillet sealing of fuel tanks and fuselage applications, providing excellent adhesion, durability, and elastomeric properties even after prolonged exposure to jet fuel and aviation gas. Teams rely on it for its fast curing, versatility, and reliable performance in extreme temperature and environmental conditions.

Key Technical Specs for PR-1826 Class B

• Type: Two-part epoxy-cured Permapol P-3 polythioether compound
• Viscosity / Consistency: Low sag, thixotropic paste; base viscosity 15,700 Poise (1,570 Pa s)
• Color: Part A Black, Part B White, Mixed Dark Gray
• Mixing Ratio: Part A : Part B = 8.5 : 100 by weight
• Cure / Working Time: B-1/4 1.5 hr, B-1/2 3 hr, B-2 16 hr at 77 F (25 C), 50% RH
• Tensile Strength: 350 psi (2,413 kPa) standard cure, 230 psi (1,586 kPa) after heat cycle
• Peel Strength: 39 59 pli (174 263 N/25 mm) depending on substrate and conditions
• Shore Hardness: 47A after 7 days cure
• Service Temperature: -80 F to 320 F (-62 C to 160 C), intermittent up to 420 F (216 C)
• Typical Uses: Fuel tank fillet sealing, fuselage sealing, aerospace MRO applications
• Shelf Life: Stable under recommended storage conditions; consult manufacturer for specific guidance

Approvals & Specifications

• AMS 3277 Type I Class B
• AMS 2629 JRF
• AMS 2471 (Anodized Aluminum)
• AMS 4901 (Titanium)
• AMS 5516 (Stainless Steel)
• MIL-C-5541 (Alodine Aluminum)
• MIL-C-27725 (IFT Coating)

Typical Aircraft MRO / AOG Applications

• Fillet sealing in commercial and military aircraft fuel tanks
• Fuselage structural sealing during assembly and repair
• Rapid response AOG sealing for critical fuel system leaks
• Maintenance operations requiring chemical and thermal resistance

Compatibility & Safety Notes

• Excellent adhesion to aluminum, titanium, stainless steel, and IFT coatings when primed with PR-1826AP Adhesion Promoter
• PPE: Gloves, eye protection, and proper ventilation recommended during application
• Surface preparation: Clean with AMS 3819-compliant lint-free cloth and appropriate solvent; ensure surfaces are contaminant-free
• Do not apply adhesion promoter below 45 F (7 C); apply sealant within 8 hours of adhesion promoter application

Packaging & Procurement

• Available in multiple kit sizes; Part A and Part B pre-weighed for accurate mixing
• Easy-to-use extrusion gun or spatula application
• Store in cool, dry environment; avoid freezing and direct sunlight
• Designed for quick deployment in both shop and field environments

Why PR-1826 Class B is Chosen for AOG / MRO

• Rapid cure minimizes aircraft downtime
• Reliable adhesion and performance under extreme conditions
• Versatile for multiple aircraft substrates and applications
• Portable kits support field repairs and urgent maintenance

Practical Suggestions for Your Team (AOG Mindset)

• Stock critical sizes and kits in your AOG inventory
• Train maintenance teams on proper mixing, priming, and application techniques
• Use clean, lint-free cloths for surface preparation to maximize adhesion
• Plan application timing to ensure optimal curing within specified windows

Manufacture / Aviation Spec Codes

• Manufacturer: PR-1826 Specialty Sealants, Inc.
• Product ID: PR-1826 Class B
• MIL / OEM / Export Codes: AMS 3277 Type I Class B, MIL-C-5541, MIL-C-27725