Its inability to deal wirh moisture is its biggest advantage. Lick your fingers before handling the glue- up and it sets instantly on your skin instead of sticking you to the wood. But for our purposes the wood does need to be dry, although for a quick glue-up you can moisten one surface, put the glue on the other and pressing them together gets an instant bond. I watched a window fitter doing that with the upvc cover sheets, meant he didnt have to stand there holding 6ft long sheets of plastic together while the glue set