Hi milos, plywood used for kayak on pictures and videos is a regular one. this same non waterproof plywood is used in doubletrouble too. and for more then a 3 years. Free kayak plans. we’re offering a free version of our laker kayak. these plans are designed to be simple to assemble but perform well on. Intro: stitch and glue kayak. although i had never actually kayaked before, one day i decided to make a stitch and glue kayak. for a non-kayaker i’m not sure why, but.