Join Date: Nov 2002
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I haven't had to take silicone off a boat, but did have to remove it from a camper. The project was resealing a leaking window, and a previous owner had removed the rather sloppily resealed it with silicone. Couldn't get the silicone to let go of the aluminum window frame or the skin of the campler. Tried several solvents (mineral spirits, acetone, etc.) and settled on Interlux 222 (their fiberglass dewaxing solvent). It caused the silicone to lose adhesion and come off nicely, though I want through a lot of 222 and shop towels. The 222 evaporated so quickly that I had to keep re applying it.
Also, I found a silicone remover at my local Ace hardware recently. Bought some ($15 for a caulking gun size tube), but haven't tried it yet.