3M - Aerospace Gray Class B-2, Type II Spec Fuel Tank & Fuselage Sealant | 051141-57958
AC-240 Class B is a two-part, polysulfide based product for use as a quick cure sealant for integral fuel tanks and fuselages. The mixed compound has a thixotropic non-sag consistency and can be readily applied with a spatula or extrusion gun or vertical surfaces. It will cure to a fuel-resistant rubber at temperature above 20ºF and exhibits excellent tooling properties with very low shrinkage. Long application life, quick cure integral fuel tank and fuselage sealant.