P/S 890 Class B is a two-part, manganese dioxide-cured polysulfide compound designed for fillet sealing of integral aircraft fuel tanks and other aircraft fuselage sealing applications.
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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 2-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 with no cracking, checking, or loss of adhesion
Corrosion resistance with no loss of adhesion or softening after immersion in salt water
Flexibility with no cracks after bending 180 degrees over a 0.125 inch (3.18 mm) mandrel
Resistance to hydrocarbons with minimal weight loss in Type III fuel
Repairable to itself, excellent for both freshly cured and fuel-aged fillets
Outstanding resistance to water, alcohols, petroleum-based and synthetic lubricating oils, and petroleum-based hydraulic fluids
Fungus resistant and non-nutrient
Specifications
Color: Part A - Black, Part B - White, Mixed - Gray
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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.
