How waterproof is it? I just made a temporary 24" eavestrough out of scraps of 1x4 and plywood to get me through to spring. Starting in a few days it will see constant water from either heavy frost on the roof or melting snow. It's not leaking now. What kind of shape will it be in next spring? This should be a pretty good test of the glue don't you think?
If anyone is interested I can post results in the spring.