Smooth Finishing Repair Mortar is a rapid drying smoothing and patching compound that is used for filling and feather finishing. The Repair Mortar is specially formulated for thinner repairs. The Repair Mortar finds application on plywood, concrete, cement/sand screeds and existing ceramic tiles. The Smooth Finishing Repair Mortar receives floor coverings as a scratch coat after only 15 minutes on absorbent sub-floors.