Join Date: Feb 2010
Location: Narragansett Bay
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Re: Amount of lead in fin keel of 1969 C&C 36 ft sailboat
dunno about the different coefficient of elasticity... but neither will keep that joint water proof if the boat is sailed upwind in heavy seas.
Where did you get the notion it would?
Itís not a notion, itís been field tested for years. As you noted, the movement is slight. The elasticity of 4200 is fully sufficient to take it up. I check the joint each Fall and itís never failed. On an iron keel, rust at the joint is a tell tale, even if it doesnít get all the way into the bolts. I replace the 4200 every few years.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.