i bought a windscreen extracter kit of ebay also the 2 pack sealer, practised by taking the old one out, then went to a breakers yard and got 4 for 50 euros,as man thought i could,nt get them out, hardest part is cleaning the old gunge of the windscreen as soon as its fitted put a span band with light pressure round it for a couple of hours then hey presto! the 2 kits of ebay cost about 35 quid, ken