If you are going to build a boat, you’ll want one worthy of your investment. read the reviews: best wooden kayak and stitch and glue kit.. 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. Stitch-and-glue: watch step-by-step videos of a stitch and glue kayak being built. all of our boat kits are built using stitch-and-glue construction..