Hi to all Re repairing plastic parts I always use a Mitre Mate adhesive system this is a two part system using a spray activator this is sprayed on to one part and left to dry then on the other part you use a cyanoacrylate adhesive then bring the two parts together this system as never let me down no mater the plastic you are repairing. this is the adhesive used by double glazing contractors. good luck sillyboy