I had the same question so I know what Im talking about.Tiger seal yeah but also I strongly recommend fixing it on with screws to.I got a body shop to fit mine.He used tigerseal and screws and its on solid he told me just tigerseal isn't enough now I dont know if he's right or wrong but I feel alot better knowing its on with screws too.Apparently they are MENT to be screwed on you take the rubber plugs out at the top of the boot lid (just above the rear window) and you will see the marks where the holes are ment to be drilled.