yeah i saw a D.I.Y on another site doing this same thing and they used 3M window-weld3M Windo-Weld 08609 specs
Hardness (SHORE A); 55-60
http://multimedia.3m.com/mws/mediawebserver?66666UuZjcFSLXTtlXTcn8&_EVuQEcuZgVs6EVs6E666666--
Thought I'd add my .02
Awesome write up kommon.:number1