HB42 Ultimate Bond and Activator is Super Strength Mitre bond activator, will create an instant bond on many substrates. Used primarily on wood mitre joints or on porous, acidic or difficult to bond surfaces including MDF, Acrylic, PBV, Timber, Steel, Rubber, Leather, Ceramics and Aluminium. The Mitre bond activator is an aerosol that accelerates the cure speed of the super glue on wood mitre joints and difficult to bond surfaces