There is a product from systems three called gel magic, a two part epoxy that you mix.
http://www.systemthree.com/store/pc/...lMagic-c16.htm
Specifically designed for optimum adhesive properties. Not a general-purpose resin made for coating and then modified with filler to act as an adhesive. When fully cured, it is unaffected by water, oil, kerosene, and many other chemicals. It will not stain wood and is immune to fungus and rot. GelMagic is ideal for stitch-and-glue, plywood, strip built and glued lap strake construction. Also use GelMagic as a high strength, gap filling, waterproof adhesive for general woodworking and architectural applications.