Fuel Tank Sealant

P/S 890 Class B is an aircraft integral fuel tank sealant. 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). This material is designed for fillet sealing of fuel tanks and other aircraft fuselage sealing applications. The cured sealant maintains excellent elastomeric properties after prolonged exposure to both jet fuel and aviation gas.

P/S 890 Class B is a two-part, manganese dioxide cured polysulfide compound. 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 having excellent adhesion to common aircraft substrates.

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PRODUCT DESCRIPTION meets AMS-S-8802 formerly Mil-S-8802F, Type II
CS 3204 is a fuel resistant sealant for use on integral fuel tanks and
pressurized cabins as well as other areas subject to contact with
aircraft fucls, lubricants, oils, water and/or weathering.
CS 3204 is a two-part polysulfide base compound which cures at
room temperature to a flexible, resilient rubber with excellent
adhesion to aluminum, magnesium, titanium, steel, and numerous
other materials. CS 3204 is designed to withstand the attack of
sulfur compounds that are present in jet fuels. When mixed, CS
3204 Class A is a self leveling liquid. CS 3204 Class B is a
thixotropic paste that will not flow or sag on vertical or overhead
surfaces.