P/S 890 Class B is a two-part, manganese dioxide-cured polysulfide compound designed for fillet sealing of integral aircraft fuel tanks. It is ideal for sealing fuel tanks and other aircraft fuselage applications.
WARNING: This product can expose you to chemicals including CARBON BLACK (AIRBORNE, UNBOUND PARTICLES OF RESPIRABLE SIZE [= 10 MICROMETERS]), TITANIUM DIOXIDE (AIRBORNE, UNBOUND PARTICLES OF RESPIRABLE SIZE) and TOLUENE which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Overview
The uncured material is a low sag, thixotropic paste suitable for application by extrusion gun or spatula. It cures at room temperature to form a resilient sealant with excellent adhesion to common aircraft substrates. The cured sealant maintains excellent elastomeric properties after prolonged exposure to both jet fuel and aviation gas. It has a service temperature range from -65°F (-54°C) to 250°F (121°C), with intermittent excursions up to 275°F (135°C). The B-2 classification indicates a specific two-hour work life (application life) after mixing, making it suitable for applications requiring more time than faster-curing variants. The storage life of P/S 890 Class B is at least 9 months when stored at temperatures below 80°F (27°C) in original, unopened containers.
Features & Benefits
Thermal rupture resistance for reliable performance
Low temperature flexibility to maintain seal integrity
Corrosion resistance
Flexibility with no cracks after bending 180 degrees over a 0.125 inch (3.18 mm) mandrel
Resistance to hydrocarbons
Repairable to itself, excellent for both freshly cured and fuel-aged fillets
Outstanding resistance to water, alcohols, and petroleum-based fluids
Fungus resistant - non-nutrient
Specifications
Color: Part A - Black, Part B - White, Mixed - Gray
Mixing Ratio by Weight: Part A: Part B 10:100
Base Viscosity: 11,000 (1100) (Brookfield #6 @ 10rpm), Poise (Pa-s)
Application Life @ 77°F (25°C), 50% RH: 2 hrs
Cure Time: 14 days @ 77°F (25°C), 50% RH
Cured Specific Gravity: 1.55
Nonvolatile Content: 95%
Tensile Strength: 300 psi (2069 KPa) - Standard cure, 14 days @ 77°F (25°C), 50% RH
Elongation: 300% - Standard cure, 14 days @ 77°F (25°C), 50% RH
Product information provided "as is", and Boeing may add, change, discontinue or remove product information at any time. Product photos may not be exact match to product delivered. Seeterms & conditions.
