how do you keep the epoxy out of the threads of the insert, when you want to have a removable bolt system?

My last post explaning caulk-ins was lost was lost.

Caulk ins are the same as machine screw anchors and this hardware can be seen on hurricanedepot.com.

the epoxy system sounds interesting. I have all my hardware installed, but my next door neighbor is getting ready to do his. Got a website describing material and application?