Polyurethane will work as long as you encapsulate the wood with epoxy....polyu glues are not meant for below waterline use where unencapsulated wood is constantly wet.....polyu glue is a pain to clean up, especially from your hands....

i've had good luck with the yellow carpenter glues.....but i've always encapulated in epoxy.....

: I am considering building a stich and glue kayak. (prob a CLC boat) Has
: anyone used polyurathane glue for boat building? I am trying to avoid the
: mess, smell, and expense of epoxy. I know I would stll need to use the
: epoxy for the seams, but will PU work for the sheer stringers and scarfs?

: Thanks- Kristopher