Silicone to seal

[H and E]

For years I have been using silicone to seal things against moisture and water. I never hear of anyone using it on RV's or boats for the same purpose and have wondered why. I would like an answer from someone that used it on their boat and what problems they had. I retired from the defense industry and it was used there to seal against the environment. Our materials engineer had no issues using it.

[mitiempo]

Silicone doesn't last a long time, eventually the seal is broken. It is very hard to remove and the residue it leaves behind will not bond with other sealants or even new silicone. The only way to remove it is by sanding. It's only good use on a boat is for acrylic or polycarbonate ports or hatch glazing, where Dow 795 is the best choice, and it is not your average silicone.