Need help whats the best way to repair a popped rivet in my boat.  Have a 16' Monark found out leak is a missing rivet.  Have been told to have it welded, replace with water proof rivet, use alumabond, ect...

If it is just one rivet put a bolt in it and a nut on the other side but before you put the bolt into it fill the hole with silcon and then tighten thebolt up you will be good as gold.  my buddy did this with 200 bad rivets on his boat and it never leaked