We have a Coachman 460/2 2001 and the smaller window L/H side has come apart ,that is the flat piece has come away from the front moulded one .It seems that the window stays and the sealing rubbers have caused a strain making it come apart near the stay fixing bracket. I asked Forum and got some good advice about sealing it with clear mastic but today having tried to get the mastic into the narrow gap(( 3mm to nothing)and about 30cm long I could not get a fixing,the ideal way unless someone can tell me otherwise is to remove the window and do the job on the bench.This seems to me to be a something that needs to be discussed beforehand as to me the whole rail which all the windows hang from would have to come off and i do not fancy that,so has anybody had any experiance doing it ?.Again many thanks in advance for advice. Tht manufactures want £218.51 for new window.