PPG PS890B-2 (1-ea-S654) - USA Only

Additional Product Information

Overview

The P/S 890 Class B is a high-performance aerospace sealant specifically engineered for aircraft integral fuel tanks and fuselage sealing applications. Designed for extreme temperature and chemical resistance, it ensures long-lasting elastomeric performance in both new aircraft assembly and maintenance, repair, and overhaul (MRO) operations. Aviation teams rely on it for its proven adhesion, flexibility, and durability under critical operating conditions.

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 / 1100 Pa·s)
• Cure/Working Time: Application life 0.5–4 hours depending on size; tack-free 4–36 hours; full cure 14 days @ 77°F (25°C), 50% RH
• Tensile/Peel Strength: Tensile strength 300–420 psi (2069–2869 kPa); peel strength 39–45 pli (173–200 N/25 mm) depending on substrate
• Shore Hardness: Durometer A 49 (fully cured)
• Service Temperature: -65°F to 250°F (-54°C to 121°C); intermittent excursions up to 275°F (135°C)
• Typical Uses: Fillet sealing of fuel tanks, fuselage sealing, aircraft structural sealing
• Shelf Life: Minimum 9 months in original unopened containers at <80°F (27°C)

Approvals & Specifications

• AMS-S-8802 Class B
• JRF (AMS 2629)
• AMS 2471 (anodized aluminum)
• MIL-DTL-5541 (alodine aluminum)
• AMS-C-27725 (IFT coating)
• AMS5516 (stainless steel)*
• AMS4911 (titanium composition C)*
• AMS4049 (alclad)

Typical Aircraft MRO / AOG Applications

• Integral fuel tank fillet sealing
• Fuselage sealing in new assembly or repairs
• Aircraft structural maintenance requiring high-temperature sealant
• Emergency repair and AOG situations involving fuel system leaks
• Corrosion-prone areas requiring chemical-resistant sealing

Compatibility & Safety Notes

• Compatible with aluminum, anodized aluminum, stainless steel, titanium, alodine, and IFT-coated substrates
• Use PR-148 Adhesion Promoter on select substrates as recommended
• Surface must be cleaned with appropriate solvents and lint-free cloth before application
• PPE: Gloves, safety glasses, and ventilation recommended during application
• Follow SDS for handling, health, and environmental precautions

Packaging & Procurement

• Available in two-part kits and Semco cartridges
• Easy-to-mix components with thorough blending required for uniformity
• Storage: Below 80°F (27°C) in unopened containers
• Ready for extrusion gun or spatula application

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

• Reliable adhesion and flexibility in extreme temperature ranges
• Rapid tack-free time enables quicker repairs and turnaround
• Versatile use across multiple substrates and structural applications
• Durable, repairable, and long-lasting in fuel-exposed environments

Practical Suggestions for Your Team (AOG Mindset)

• Maintain stock of standard kit sizes and cartridges for emergency AOG repair
• Train MRO technicians on proper mixing and surface preparation
• Use clean solvents and lint-free cloths to ensure adhesion
• Prioritize sealing high-stress and fuel-exposed areas during inspections

Manufacture / Aviation Spec Codes

• Manufacturer: PPG Aerospace
• Product ID: P/S 890 Class B
• MIL/OEM/Export Codes: AMS-S-8802 Class B, JRF (AMS 2629), MIL-DTL-5541, AMS-C-27725, AMS5516, AMS4911, AMS4049

Alternative Names & Descriptions

• P/S 890 B Fuel Tank Sealant
• PPG 890 Class B Polysulfide Sealant
• Aircraft Integral Fuel Tank Sealant – Class B
• PPG P/S 890B Two-Part Sealant
• Aerospace Fuel Tank Fillet Sealant P/S 890B