Application: Filling knife or other suitable tool. STIR THOROUGHLY BEFORE USE. This product does not require thinning, but may be made easier to use by adding a few drops of clean water and then mixing to a stiff paste. Dampen the area to be made good, using a clean damp sponge and then press the filler firmly into the defect using a clean filling knife. Leave a small excess of the filler to allow for any sinkage and rub down smooth when dry. Drying time is variable depending on the depth of repair and will take significantly longer in cold, damp conditions, but allow at least overnight before rubbing down.