Just pop speaker grill of by my be a flat head screwdriver, then you access to sub, get clear silicone and pull back the edge of the rubber surround on the woofer but be gentle no need to pull back much, just enough to get a bead of silicone where the rubber edge sits on to the metal lip. Once you pull it back a bit you'll get the drift of what to do, takes ten minutes to do let silicone cure for half hour and it should be good as new. I did mine and after a year I sold car and sub was still good. One other thing I don't know if you could get a small tube of silicone as it would be easier to get a the sub with it. Good luck phil