Small Crack in Coil Epoxy

I took the cover off of my ML Pro-Coil, to clean under it and found a small transverse crack in the epoxy, where the lead goes from the connector (embedded) to the coil. I could flex the coil slightly and it would open a little. I wasn't having any problems with the coil that I now of (had even rinsed it before), so I just cleaned it real good with some alcohol, blew it out and dried it with a hair dryer. Then flexed it open and forced silicone in it. I let the coil relax and it compressed the silicone, forcing just a little out, let it dry for 24 hours. I checked it after several uses and it seems to still be sealed. That said, did I do it correctly or should I have used epoxy or something different. It's still working great......