My 23 Foot compac started leaking in the cocpit area down below through several bolt heads, side pockets, and maybe a few instruments. I am using marine silicone between showers but it just keeps on raining. I am not sure why the flood all of a sudden but need advice on what best to use to seal. My beautiful original upholstery has been removed and I hope to save though it may be too late on some of that. Some of the furniture has turned black in spots, but I can save most of that. I hope to stop this all of a sudden situation. Is there something better than marine silicone?