Join Date: Oct 2000
Location: Portland, OR
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I do not doubt the sincerity of those for or against any particular material or sealant.
I can cite my own success.
Upon the advice of one of the best boat builders in the region, I used black Boatlife Life Seal to bond all four of my new replacement large external Lexan lens pieces to our boat in '95.
Never a leak or a crack since. Nada. Zip.
Having said that, there are tricks of the trade to getting a good bond, and chief among those is "floating" the lens on about 3/16" of sealant, so that the coefficient of expansion of the Lexan will not break the bond loose.
There are some other pointers as well, and I have referenced those in other threads.
Note B: there seems to be some difference in UV resistance and general life span between the cast acrylic you see in port lights from Lewmar, to name just one, and the sheet goods at the local plastics store. The basic plastic compound may well be the same, but the cast product product does seem to perform a little better. (IMO, and YMMV)
Last edited by olson34; 11-01-2010 at 10:21 AM.