All are brand new, without original box packaging! Never been used! Please note this listing is for Black cream body filler hardener 4oz Select you pack size needs! The Black Cream Hardener is a hardening agent designed to speed up body repairs. It is a non-separating, quick-hardening cream that can be used with body fillers. It also works well in conjunction with polyester finishing putties and specialty fillers. Speeding up the repair process, this cream hardener is suitable for use with a range of fillers.