Directions: - Scrape off all old and loose plaster of paris - Wet slate joints, screw holes and parts to be covered with water - Mix Plas-Co-Cement with water and apply, being sure to work into the cracks well with putty knife - Let set and finish off with sand paper wrapped around a block of wood - Plas-Co-Cement will not shrink - Keep in dry place when not is use. Made in the USA by Tweeten Fibre Company