... core 2) Wearing, crack and alkaline resistant film faced plywood,brown,black,construction plywood1) WBP glue, poplar, birch or composition core ... 4) Special waterproof resin can extend the usage life of concrete 5) Foreign brown and black film or local film 6) Environmentally ... 2, 500mm) x (12, 15, 18, 20 or 21)mm Brown film faced plywood