Deserter to Lexus
Car: Lexus IS250
Join Date: 16th March 2014
Thanked 695 Times in 528 Posts
Yeah as a vehicle body repairer I would usually recommend drilling and doing the job properly, but after fitting one myself I can confirm the best job is just sealing the thing on!
Use any decent adhesive PU sealer and it wont move a muscle, no idea what someone has used to put it on that its started to move I can assure you some decent sealant will have it for life.
Search ebay for windscreen sealant if you want something stronger than strong, or there is tiger seal, or if you want to go silly strong their is panel bond which is 2 pac but way overkill for this job and will require specialist tools to apply.
But basically don't worry about the thing moving once its sealed down it isn't going anywhere I promise