Granny B's Classic Seal can be used on all indoor and outdoor surfaces. Correct application will waterproof, protect and increase the appeal on your finished project. Granny B's Classic Seal is an acrylic sealant which is easy to apply. It contains UV inhibitor which increases it's sun resistant properties and also retards bacteria and fungal growth. It also provides an oil resistance and water proof finish that will not peel, crack, flake or stain under normal use, if applied correctly.