PPG Aerospace® PR-1440 B-2 Gray PRC Standard Spec Fuel Tank Sealant - 6 oz 654-SemKit

"PR-1440 Class B is an advanced aircraft integral fuel tank sealant, offering a wide service temperature range from -65°F (-54°C) to 250°F (121°C), with tolerance for brief exposure up to 275°F (135°C). Specifically designed for fillet sealing in fuel tanks, it’s also suitable for various aircraft fuselage sealing applications. Once cured, the sealant maintains strong elastomeric properties, even after extended exposure to jet fuel and aviation gas.

PR-1440 Class B is a two-part, manganese dioxide-cured polysulfide compound. In its uncured state, it is a low-sag, thixotropic paste, ideal for application by extrusion gun or spatula. Curing at room temperature, it forms a durable sealant with excellent adhesion to standard aircraft substrates."