Silicon for mounting under water line

I’m going to be mounting a couple things under the water line and am curious to know what silicon i should use. Things of course like a transducer, a bolt to hold something else on the boat interior will be sticking through, and a livewell will be mounted soon. Can any clear silicon like from Fleet Farm work for this? THanks

You can get a silicone that is made for marine and underwater use. Fleet farm or auot parts store will have it. Make sure you give it 24 hours to set up before putting it in the water.