most companys wont know DC... cause DC dose not build product stock..there woofers are build per order in the USA... not built in china and shipped to the US... there are three people that make up DC audio... rusty, ana, and rob... they are swamped right now and they just got back from finals
they make a rubber ca type glue that can be used... I have seen people use silcone caulk in a pinch (i would get the right stuff if you have the time)
I got a hold of rob.....
he said use goop