Water-resistant impregnating fireproof varnish for wood Uniepal Drew Aqua color is intended for fireproof protection and decorative finishing of wooden surfaces made of species in domestic wood, OSB boards, plywood and wood-based material used inside residential and public facilities as well as outside buildings. At 23 C (2) and 50% relative humidity (5) the second layer can be applied after 16 hours, the third layer after the previous layers have completely dried. Uniepal Drew Aqua does not apply to exotic wood species.