A single pack, fully waterproof, moisture curing polyurethane adhesive. Purbond is an extremely economical polyurethane glue. Purbond glues almost anything to almost anything. We have glued up samples of several hundred Australian timber species with Purbond, including the difficult ones like Huon Pine, Jarrah and Beech and provided the joint is done in accordance with the instructions, when we tear the Purbond joint apart, the wood always fails first. This Purbond glue likes to be clamped and clamped hard. Freshly cut wood surfaces and a little moisture in the joint (only a little!) is how we get great joint strength from Purbond adhesive. A little goes a long way. Purbond is also used to glue stainless steel splashbacks to MDF, PVC duct to concrete walls, even an overcoating of concrete over a deteriorated concrete floor. Almost anything to anything.