paddling suit

I just brought a used Kokatat paddling dry suit. It have a Neo cinch neck and latex wrist gasket, will it let water in if I fall into the water? how much time do I have before I see God in 40 F ?

I don't get much in past my neck.  I keep the neoprene pretty tight and I only get a little damp around the neck.
As far as how long you can stay in the water, I'd think it would depend on what you're wearing under your drysuit and water temp.

As far as how long you can stay in the water, I'd think it would depend on what you're wearing under your drysuit and water temp.

And how chubby you are.  Don't forget that we fluffy folks get a few minutes longer than you low body-fat guys...   

I was practicing re-entry a couple of weeks ago and no water got past the neoprene neck gasket.  Definitely got water inside the gasket, but none made it down to the neck seam of my shirt.

Thanks for the info guys. I weight about 160 lbs, I will tell my wife that I need to add a few more lbs. 

Wait!  I didn't say hdpwipmonkey is fluffy, just me. 

Unless you have gorilla-hairy arms, you shouldn't be getting any water in past the latex wrist gaskets.  You can expect to get a little water in past the neoprene neck collar when you go into the water.  How much water enters will depend on how tight you keep the neck cinched up.  Assuming you're wearing a PFD (you better be!), that initial entry should be the only chance water has to get into the neck gasket.  Once you settle in the water, the PDF should keep the neck more or less above the water line.  If you're wearing good base layers under your suit (wicking synthetic materials, fleece, absolutely no cotton), you should be able to tolerate some water in the suit without getting too cold. 

Unless you have gorilla-hairy arms, you shouldn't be getting any water in past the latex wrist gaskets.  You can expect to get a little water in past the neoprene neck collar when you go into the water.  How much water enters will depend on how tight you keep the neck cinched up.  Assuming you're wearing a PFD (you better be!), that initial entry should be the only chance water has to get into the neck gasket.  Once you settle in the water, the PDF should keep the neck more or less above the water line.  If you're wearing good base layers under your suit (wicking synthetic materials, fleece, absolutely no cotton), you should be able to tolerate some water in the suit without getting too cold.

+1 on the layering. Def no cotton. Fleece top layers. Also a PFD will insulate more than an auto co2 life jacket.

an auto co2 life jacket.

These have no place on a kayak or any other watercraft where you stand a good chance of entering the water. 

1.  In a fishing kayak, your PFD should not be subject to puncture by hooks, knives, fins, etc.
2.  CO2 PFDs are effectively a one-shot thing.  You're without PFD protection while/if you try to reload one on the water.  They're a PITA to wear once inflated.  If you inflate your CO2 vest, you're done for the day. 
3.  I've never tried it, but I can't imagine trying to reenter a kayak with an inflatable would be fun, or even possible.  I've read at least one account of someone needing to deflate their vest to reenter. 

My brother brought an inflatable on a (planned) week-long float trip through the Bob Marshall Wilderness in Montana, fishing for cutthroat and bull trout out of inflatable pontoon rafts.  He flipped his raft in a small rapids and inflated his vest.  He didn't bring spare cartridges and had to make the rest of the float without a PFD.  He opted for comfort over safety, and was very obviously shaken and uncomfortable making the rest of the trip unprotected.  We hurried through the rest of the river miles and got off the water two days early (this event basically ruined the trip).  If I had known he was bringing one of these I'd have insisted he change his plans.  Auto inflators are for bass boats on flat water, not tupperware on moving water or big water. 

+1, more good reasons to stick with a PFD designed for kayak fishing.

I was under the impression that there's no longer such a thing as a single-use inflatable and they all must have a manual inflation backup to be USCG certified.

Nevertheless, as you said, they aren't the right choice for most kayaking situations.

If you dump your kayak in rough water, your Class III PFD isn't going to automatically hold your head and neck above water because they aren't designed to or required to do that.  There's always a chance you could repeatedly take on minute amounts of water.

Keep the neoprene neck gasket snug.

Not that you should count on it for flotation, BUT, your drysuit- even with the neoprene gasket- usually looks like the stay puff marshmallow man when you first fall in anyway.  Likely wouldn't need to inflate the co2 vest.

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