PPG PR1440B-2 (1-ea-S654)

PR-1440 Class B Fuel Tank Sealant

Overview

PR-1440 Class B Fuel Tank Sealant is a two-part, manganese dioxide-cured polysulfide sealant developed by PPG Aerospace for aircraft integral fuel tanks and fuselage sealing applications. Designed for extrusion gun or spatula application, the low-sag, thixotropic compound provides outstanding adhesion to common aerospace substrates while maintaining excellent elastomeric properties after prolonged exposure to jet fuel, aviation gasoline, hydraulic fluids, and harsh operating environments. The sealant offers a service temperature range from -54°C to +121°C, with intermittent exposure up to +135°C.

Key Technical Specs

• Product Type: Two-part polysulfide aircraft fuel tank sealant
• Class: AMS-S-8802 Class B
• Cure System: Manganese dioxide cured
• Mix Ratio (by weight): Part A : Part B = 10 : 100
• Colour: Black (Part A), Off White (Part B), Dark Gray (Mixed)
• Application Method: Extrusion gun or spatula
• Service Temperature: -54°C to +121°C (intermittent to +135°C)
• Specific Gravity: 1.57
• Non-Volatile Content: 97%
• Ultimate Hardness: Shore A 50
• Base Viscosity: Approximately 10,000 Poise
• Application Life: B-1/2 - 0.5 hour; B-2 - 2 hours (25°C)
• Storage Life: Minimum 6 months below 27°C in unopened containers

Approvals & Specifications

• Tested in accordance with AMS-S-8802 Class B specification
• Compatible with common aerospace fuel tank sealing applications
• Available in standard two-part kits, Semkits®, frozen Semco® cartridges, and PPG ARE™ preformed parts

Typical Applications

• Aircraft integral fuel tank sealing
• Fuel tank fillet sealing
• Aircraft fuselage sealing applications
• OEM aircraft manufacturing
• Commercial and military aircraft maintenance and overhaul
• Applications requiring long-term resistance to aviation fuels and hydraulic fluids

Compatibility & Safety Notes

• Clean all substrates thoroughly before application to remove oils, grease and contaminants
• Use approved solvent cleaning procedures with lint-free cloths
• Allow cleaned surfaces to dry completely before applying sealant
• Adhesion characteristics should be verified on production substrates where required
• Consult the Safety Data Sheet (SDS) before use
• For industrial use only
• Keep away from children and avoid prolonged overexposure

Packaging & Procurement

• Two-part can kits
• Semkits® pre-mixed cartridges
• Frozen Semco® cartridges
• Available as preformed parts using PPG ARE™ technology

Why This Product is Chosen for AOG / MRO

• Excellent long-term resistance to jet fuel, aviation gasoline and hydraulic fluids
• Maintains flexibility across extreme operating temperatures
• Strong adhesion to common aerospace substrates
• Outstanding repairability for both fresh and aged sealant repairs
• High resistance to corrosion, saltwater exposure and hydrocarbon immersion
• Available in multiple packaging formats for efficient maintenance operations

Practical Suggestions for Your Team (AOG Mindset)

• Ensure all sealing surfaces are completely clean and dry before application
• Select the appropriate Class B application life (B-1/2 or B-2) based on repair size and working time requirements
• Use progressive solvent cleaning with clean lint-free cloths to prevent contamination
• Verify substrate adhesion where different alloys or surface treatments are involved
• Store unopened material below 27°C to maximise shelf life
• Use Semkits® or preformed parts for faster field repairs and reduced mixing errors

Manufacturer / Aviation Spec Codes

• Manufacturer: PPG Aerospace (PRC-DeSoto)
• Product Name: PR-1440 Class B Fuel Tank Sealant
• Product Type: Two-part polysulfide aircraft fuel tank sealant
• Specification: AMS-S-8802 Class B
• Application: Aircraft integral fuel tanks and fuselage sealing
• Packaging Options: Can kits, Semkits®, Frozen Semco® cartridges, PPG ARE™ preformed parts