Ultra-Floor Feather IT is a smoothing and patching compound that has exceptional bond to sand/cement screeds, concrete or plywood, without the need to use a primer. It can be used as a scratch coat to fill wood grain and for joints between sheets of plywood. Capable of achieving thickness from feather of up to 3mm. Also suitable for smoothing and patching ridges, trowel marks and other surface depressions. Open time 10-20 minutes, foot traffic after 1 hour.