[QUOTE=Avatard;298760]Sounds like a good way to destroy the breathability of the fabric. Which means you will get even more sweaty and uncomfortable. May as well coat it in vinyl
If any of you can remember what it was like to have a new dry suit you will remember that they are not only fully waterproof, but they are air proof. By this I mean you better remember to let the air out or you will become a human beach ball in a big hole.
With that said the polyurethane spray is spot on. The breathability of the suits is not the concern, and even if it was if air can trap inside like a float bag then where is the breathability you were hoping for?
My point is that "VINYL" is genius...I would have never thought of that.
I just ordered some clear spray on for plastic vinyl because of this thread...thanks!!!! I will test it out on the butt of the suit. Let's just say I'm not terribly worried if my butt can breathe.
Lastly, there seems to be some confusion about whether your suit is leaking on the seams or somewhere else. Your suit is leaking all over I promise you. If the fabric on the inside is moist after your paddle or swim
your suit is either no longer new or it needs a good coat of spray. You will notice certain areas tend to be more moist than others. Gore-Tex is a thin fabric with small holes in it and the suits have many layers (hence $1000). Sitting on a wet seat or a tight PFD is enough pressure to push the water through...again if the suit is not new. This also helps in realizing that you don't really need to treat the legs a whole lot.
If anyone doesn't believe me about these things just know that I kayak often without taking my work clothes off and come out dry as a bone. (please realize I'm not talking about aggressive creaking or playboating thus lots of sweat). But even if you do build up a sweat you will only question your suit until you realize the fabric inside is dry. Also, it may help to know I have sprayed the inside of the suit as well and nothing bad came of it.
Thanks for letting me have fun and share the success I have experienced in staying bone dry.