Here's a forum link on silicone.
http://www.cichlid-forum.com/phpBB/v...r=asc&&start=0
Bottom line......... GE I, II or DAP are safe to use as long as they are not mildew resistant or contains anti molding. "Windows and Doors" (blue) does not contain antimolding, so it is safe. "Kitchen and bath" and "tile" contains anti mold.
I have personally used both GEI and GE II Windows and doors and did not have any problem with them.