Two part bonding product moulds like putty, yet hardens in one hour to steel like consistency. Does not shrink and is not affected by solvents, oil or gasoline. Maximum use temperature of 250 degrees F makes it perfect for repairing intake manifolds, cylinder head intake ports, heads and blocks. Also useful for filling crevices in lifter galleries and installing filter screens. Can be drilled and tapped when hard. Adheres to almost any clean surface and hardens in 60 minutes at 75 degrees F. One year shelf life. Easy to use applicator.