Can someone tell me what type of glue you use to mount the in-hull transducers. I have gotten two very passionate answers about this from the two people I asked. One answer was to use the normal 5200 through-hull glue that you use for ballast fitting and below water line stuff and the other answer was absolutely not to use that. I was told to make a ring out of RV silicone and fill it with a 2 part clear epoxy. I was told that the 5200 would block the transducer.

Can someone please let me know I am about to mount this thing and need a clear answer. Thanks in advance