Stitch and glue is a simple boat building method which uses plywood panels stitched together, usually with copper wire, and glued together with epoxy resin.. 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. Intro: making a plywood kayak. the jupiter point series of kayak designs are intended as easy-to-build, fun-to-paddle, versatile collection of kayaks..