Thistle Board finish should be used as a plaster top coat on to low to medium suction backgrounds such as plasterboard or Thistle Dri-Coat. Thistle Board Finish 25kg is a top-coat plaster is a dry bagged Gypsum powder that should be mixed with water. Once dry, Board finish can be decorated on to, taking care to prime any fresh plaster before applying any top coats of decoration in the usual manner.British Gypsum suggest the following-Nominal Weight per bag = 25kg Coverage per bag = 10m2 at 2mm Setting time = 1.5 Hours
