PPG PS890B-1/2 (1-ea-S655)

Additional Product Information

Overview

P/S 890 Class B is a high-performance aircraft integral fuel tank sealant, designed for fillet sealing in fuel tanks and fuselage structures. Aerospace and MRO teams rely on it for its exceptional chemical resistance, thermal stability, and long-lasting elastomeric properties. Its ease of application and reliable adhesion make it an essential material for assembly, repair, and maintenance operations.

Key Technical Specs for P/S 890 Class B

• Type: Two-part, manganese dioxide cured polysulfide sealant
• Size/Volume: Supplied in two-part kits and Semco cartridges
• Color: Part A black, Part B white, mixed gray
• Viscosity/Consistency: Thixotropic, low-sag paste; Brookfield #7 @ 2 rpm: 11,000 poise (1,100 Pa s)
• Cure/Working Time: Application life 0.5 4 hours; tack-free 4 36 hours; full cure 14 days at 77 F (25 C), 50% RH
• Tensile/Peel Strength: Tensile strength 300 420 psi (2,069 2,869 kPa); peel strength 39 45 pli across common aerospace substrates
• Shore Hardness: Durometer A 49 after full cure
• Service Temperature: -65 F (-54 C) to 250 F (121 C), intermittent up to 275 F (135 C)
• Typical Uses: Fuel tank fillet sealing, fuselage sealing, structural joints in aircraft
• Shelf Life: Minimum 9 months at temperatures below 80 F (27 C) in original unopened containers

Approvals & Specifications

• AMS-S-8802 Class B
• AMS 2471, MIL-DTL-5541, AMS-C-27725, AMS5516, AMS4911, AMS4049 (peel/tensile testing)
• Meets requirements for chemical, thermal, and corrosion resistance in aviation applications

Typical Aircraft MRO / AOG Applications

• Fuel tank fillet sealing during routine maintenance
• Fuselage sealing and structural joint repairs
• Aircraft assembly and retrofit sealing operations
• Emergency AOG fuel system repairs
• Preventative maintenance to maintain pressure and structural integrity

Compatibility & Safety Notes

• Compatible with aluminum, anodized aluminum, titanium, stainless steel, and coated substrates
• Surfaces must be cleaned with appropriate solvents before application
• Use PPE as recommended in Safety Data Sheet (SDS)
• Avoid overexposure; follow handling and storage guidelines
• Repairable to both fresh and fuel-aged sealant surfaces

Packaging & Procurement

• Supplied in two-part kits and Semco cartridges
• Room-temperature storage below 80 F (27 C) recommended
• Low-sag paste suitable for extrusion gun or spatula application
• Pre-measured kits simplify mixing and application

Why P/S 890 Class B is Chosen for AOG / MRO

• Rapid application and curing for reduced downtime
• Exceptional reliability under extreme temperature and chemical exposure
• Versatile across multiple substrates and aircraft systems
• Portable kits designed for on-site or hangar use

Practical Suggestions for Your Team (AOG Mindset)

• Maintain stocked kits for quick response during AOG situations
• Train maintenance personnel on proper mixing and surface prep
• Follow progressive cleaning with lint-free cloths to ensure adhesion
• Use for both preventive maintenance and emergency repairs

Manufacture / Aviation Spec Codes

• Manufacturer: [Insert Manufacturer Name]
• Product ID: P/S 890 Class B
• MIL/OEM/Export Codes: AMS-S-8802 Class B, AMS 2471, MIL-DTL-5541, AMS-C-27725, AMS5516, AMS4911, AMS4049

Alternative Names & Descriptions

• P/S 890 Class B Sealant
• Aircraft Fuel Tank Sealant P/S 890 B
• Polysulfide MRO Sealant
• Class B Integral Fuel Tank Sealant
• P/S 890B Aviation Sealant Kit