Sunmight film's premium grain and strong resin bond provide faster and sharper cutting performance and longer life than competitors products Film backing is very strong and durable, it does not tear easily during sanding operation and is great for edges, corners and irregular shapes With uniform mineral coating on perfectly even surface, film works better than paper, the result is outstanding finish without deep scratch marks Special resin over resin adhesion technology reduces shelling problems Sunmight film is a premium product with strong and even surface film backing that allows better surface finish and longer life. It is also great for corner and edge sanding without problems with tearing.