Additional Details ------------------------------ Product description: Plaster Magic Contractors Patching Plaster Our very own patching plaster, designed through my 30 years plastering for maximum compatibility, patented and the best structural patching plaster available for use in historic homes. Not like those other ?patching plaster? which are brittle and have no structure, this is the real deal. Apply, allow to set and skim with joint compound. Packaged in a two gallon plaster pail it covers 500 square inches. The Plaster Magic Contractors Patching Plaster is approximately twice the size of our Plaster Magic Painters Patching Plaster. There is some settling during shipping as these are packaged by weight not by volume. (The Contractors Patching Plaster is equal to 2 Painters Patching Plasters)