bonda filler 7kg 35.00 inc vat. this multi purpose filler is available in various sizes for the professional decorator. a two-part filler that is rapid hardening, with a non tack surface that is easy to sand. fills wood. filling holes, splits and shakes and damaged edges on joinery. repairing windows and door frames. fills metal. filling dents and holes in metal.smoothes welded joints and rough metal surfaces. repairing metal pipes/gutters. secures bolts and screws. fills concrete. fills cracks and holes. can be used to bond and build up damaged areas. repairs grp.repairs cracks,fractures and holes in grp.