I am currently in the process of replacing standing rigging. While the rigger prepares the new rigging I plan to re-bed the chainplates while the rigging is removed. I have read most of the past posts on the forum on this topic and the Maine Sail detailed article on the benefits of butyl tape and the downsides of silicone. However, my rigger has traditionally used SCS2000 Silpruf (a GE product) preceded by a thorough cleaning and application of a special primer (acetone plus some other nasty stuff), and says he’s never had a problem with it. So I’m inclined to follow his lead as a well established and knowledgeable rigger.
BUT. ... Two questions: 1. Does anyone have an opinion on the choice of bedding sealants? 2. Since stainless can corrode in the absence of oxygen, would it actually be better not to fill the void below the chainplate with sealant? I.e., is this another argument for butyl tape just under the chainplate cover and between the cover opening and the chainplate? I guess the assumption is that sealant filling the whole cavity will prevent water from getting into an oxygen delpleted area.
Thanks for any advice.