4x PROXL Pro Ultra Build High Build Primer Aerosol 500ml Grey - FAST DELIVERYModel No. ULTRABUILDUltraBuild Primer Filler Aerosol (500ml)ULTRABUILDDESCRIPTION A unique high-build spray filler-primer providing excellent adhesion to many difficult substrates including plastics and aluminium.  This two-in-one filler and primer dries fast, sands easily and can be over-coated with either water or solvent-based paints.