i used roofers stuff the very first time on all the 4 doors cant remember the name but used for sealing guttering etc,the pain in the ass door i,ve used quite a few different sealants from b&q,me thinks the doors maybe been hit before and repaired and not quite right(bent) if i remember right i used almost a full tube of silicon sealant(the vinegar smelly stuff)cos i was mad at the time after kneeled on one of the 10mm screws whilst on my knees(still have the imprint on my kneecap im sure) so i gave it the full buna hoping never to see the inside of a door again,dont know how the window still moves ok