I've been on some of the fastest roller coasters there are at Busch Gardens with only white glue at the hairline. The piece isn't going anywhere. Use blue liner everywhere but the very front for added security.

Next time I go I'm going to buy a copy of the picture they sell at the end of the ride and post it up for everyone to see. That will dispel the myth that the piece is going to fly off your head once and for all.