This is a FEC633 Fiber Tech 1.79 LB. An innovative all purpose repair compound formulated with Kevlar & other high tech fibers. It's superior strength & adhesion is ideal for repairing SMC, rigid plastic body panels, i.e., ground effects, spoilers, running boards, fenders, hoods etc. It also contains ZNX-7 for superior adhesion to steel, galvanized steel & aluminum. Blue cream hardener included.