When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
E-6000. Don't ask me where to get it though. When I worked for a JL dealer this is the stuff they sent to us to fix all their crappily glued dustcaps. Carefull though it's got more warnings than SNL's Happy FunBall!
We use E6000. You can also find it at a Michaels crafts store. I think they stopped making it in Black though. DO NOT USE CRAZY GLUE or any other type of glue, I've seen too many speakers get ruined this way.