PPG PR1826B-1/4- A1001 (100-ml-Semkit)

PR-1826 Class B

Overview

PR-1826 Class B is a rapid-curing aerospace fuel tank sealant designed for aircraft integral fuel tank sealing and fuselage sealing applications. This two-part, epoxy-cured Permapol P-3 polythioether compound provides outstanding fuel resistance, flexibility, and adhesion to common aircraft substrates. Unlike conventional polysulfide sealants, PR-1826 cures effectively at low temperatures and is not affected by changes in relative humidity, making it highly suitable for demanding aerospace maintenance and production environments.

Key Technical Specs

• Product Type: Two-part epoxy-cured polythioether aircraft sealant
• Service Temperature Range: -62°C to +160°C (-80°F to +320°F)
• Intermittent Temperature Resistance: Up to +216°C (+420°F)
• Mix Ratio: Part A : Part B = 100 : 8.5 by weight
• Colour (Mixed): Dark Grey
• Application Consistency: Low sag, thixotropic paste
• Application Method: Extrusion gun or spatula
• Base Viscosity: Approx. 15,700 poise
• Cured Specific Gravity: 1.47
• Non-Volatile Content: 96%
• Ultimate Hardness: 47 Shore A
• Tack-Free Time: Less than 12 hours
• Application Life:
• B-1/4: Approx. 1.5 hours
• B-1/2: Approx. 2 hours
• B-2: Approx. 3 hours
• Cure to 30A Durometer: Approx. 16 hours

Approvals & Specifications

• Tested in accordance with AMS 3277 Type 1 Class B specification methods
• Qualified for aerospace fuel tank sealing applications
• Compatible with OEM aircraft sealing requirements

Typical Applications

• Aircraft integral fuel tank sealing
• Fuel-resistant fuselage sealing applications
• Fillet sealing in wet wing structures
• Aircraft structural sealing exposed to aviation fuels
• Maintenance and repair sealing in aerospace environments

Compatibility & Safety Notes

• Excellent adhesion when used with PR-1826AP Adhesion Promoter
• Compatible with anodized aluminum, titanium, stainless steel, alodined aluminum and IFT-coated substrates
• Maintains elastomeric properties after prolonged fuel exposure
• Unaffected by relative humidity during curing
• Resistant to aviation gasoline and jet fuel exposure
• Demonstrates excellent low-temperature flexibility without cracking or adhesion loss
• Refer to Safety Data Sheet (SDS) before use

Packaging & Procurement

• Supplied as a two-part aerospace sealant kit
• Available in cartridges, Semco packaging and bulk kit formats
• Designed for manual or pneumatic application systems
• Compatible with aerospace fuel tank sealing processes

Why This Product is Chosen for AOG / MRO

• Rapid cure profile reduces aircraft downtime during maintenance operations
• Excellent fuel resistance supports long-term sealing reliability
• Low-temperature curing capability allows wider maintenance flexibility
• Outstanding adhesion and flexibility improve structural sealing performance
• Suitable for high-demand aerospace fuel containment applications

Practical Suggestions for Your Team (AOG Mindset)

• Always use PR-1826AP Adhesion Promoter for optimum substrate bonding
• Monitor application life closely to avoid material waste
• Ensure surfaces are fully cleaned and properly prepared before sealing
• Allow full cure before fuel exposure or pressure testing
• Use controlled storage conditions to maintain sealant shelf life and performance

Manufacturer / Aviation Spec Codes

• Product Name: PR-1826 Class B
• Product Type: Rapid cure aircraft fuel tank sealant
• Specification: AMS 3277 Type 1 Class B
• Chemistry: Epoxy-cured Permapol P-3 polythioether
• Application: Aerospace fuel tank and fuselage sealing

Alternative Names & Descriptions

• Aircraft fuel tank sealant
• Rapid cure aerospace sealant
• Fuel-resistant aircraft polysulfide alternative sealant
• Wet wing sealing compound
• Aviation fuselage sealing material