I used the gap seal tape found at this link. It has been on my Impact for about a year now and showing no signs of coming loose or causing trouble. It definitely stops the screeches in snaps. There are some posts and pictures in the huge Composite-arf Impact build thread about 3/4ths of the way through it.

http://www.nesail.com/detail.php?productID=1152

Hope this helps.
Tom