More at the link below

> Weldwood Plastic Resin glue is water-resistant and is FAA approved
> for use in certified aircraft and have been used for many years in
> a wide range of aircraft applications. Conforms to Fed. Spec. MMM-A-188b,
> Type II (Unextended). It is unaffected by oil, gasoline and solvents.
> Pot life: 4-5 hrs. Mix Raitio: 5 to 2 by volume. Excellent for use
> on wood structures.

> It comes as a powder to which you add water, which should also
> allow for use of sawdust to create a waterproof wood dough. I've used
> it on sailboats, and it is great stuff, though a bit messy.