I use the sealskin shooting gloves as they have the fold back fore finger and thumb, which is handy when using a centrepin reel etc. However, they are most certainly not 100% waterproof and once wet, seem to go very cold.
I have to say I have found the Orvis fold over or fingerless fleece gloves to be just as good and a lot cheaper and often my first choice out the two. Even when wet, a quick wring out and they keep my hands warm.
I also have a sealskin "beanie" and again, disappointed in it. A cheap Thinsulate one is warmer and just as waterproof.