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post #10 of Old 10-16-2006
alanl
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Maybe I'm new-fashioned, but I would not let silicone anywhere near a boat of mine. Polyurethane conversely, comes in different grades for use as a bonding agent and/or sealant and if properly applied on a clean, dry substrate, will outlast silicone by a factor of 10 and with none of the disadvantages. I can't comment on US availability, but the brands available here are primarily SIKAFLEX (A Swiss brand) Selleys and I'm sure 3M and Dow have them too. They are commonly used in the building, automotive and even aircraft industries. Try an Internet search

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Alan
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