Best Way To Put On A Roof Spoiler?

[IM-32-FK]

What is the best way to put on a roof spoiler. What material. I mean it is very light and flimsy and i dont want it flying off the roof when im driving at 100km/h lol...

[V28VX37]

Sikaflex, stay away from the edges and let it cure for 48 hours under pressure e.g. under a tiedown. And don't do it on a 40deg day like I did.

See here for more info: http://www.skylinesaustralia.com/forums/topic/438115-how-to-install-boot-lip-and-roof-wing/