I've managed to collect a few Old Town 138 [13.8 foot] recreational kayaks that I've used for the last 9 years. I've thought many times about adding floatation, but trying to find bags that 'fit' and the thought of losing valuable 'gear' space has stopped me. I compensated by never filling them with water, but last year I took a friend who decided to attempt an "under dead tree sideways role while reciting profanity". After I stopped laughing and began helping, I realized a 14 foot rec boat [that already weighs 60 lbs empty] when FULL of water does not want to float, move, or cooperate in any kind of current. It made me think about floatation.
I HAVE noticed there is quite a bit of space in nose [and rear] that I never actually utilize, but it'd be tough to find a bag that small and just the right shape to fit and/or find a way to secure it.
There is something I read about called "liquid foam" that is a "part A & B" mix that expands. It can be poured into a container, mold (kayak end?), etc and claims to provide floatation. Not sure if it's even close by volume to the floatation an air bag would provide. Has anyone use this for the application I'm eluding to? Either way, what do you think of this option?
Thank you,
Charles