And... adding to Gord's caution, I have to say West Marine
has a very good primer regarding sealants in general:
West Marine: West Advisor
If you are in the store, they have a handy little chart next to the sealants that shows you which materials and applications certain sealants are best for. You really can't go wrong following their advice.
For instance - I used a product I had never used before sealing up my port leaks
on the Catalac
. The ports
or "windows" on the Catalac
are an aluminum
frame with thick, tempered safety
glass shimmed in. This type of arrangement requires the window to be glazed, just like an automobile window or other glazed window.
The chart in West Marine
directed me to LifeCaulk's Clear product, which worked fantastically. It was recommended to seal aluminum
to glass in the chart. Perfect for my application.