No, the seams are neither sealed nor taped. Here's a comp. w/ OR mitt shells that are taped.
What I'll do, if I find it to be a problem, is thin some shoegoo in xylene, goof-off works, and paint it on the seams. All of a 5 minute operation.
What is more of a problem for me is going in and out of the gloves to fiddle with dog tack. I'll be introducing much more moisture that way.
ETA, these are most similar to the Alti glove on the or site. Except these do not have stretch softshell on the back.
http://www.outdoorresearch.com/home/style/home/handtools/gloves/ascent/71881ETA:
better description and customer reviews.