This product is a two-part kit that is mixed together to produce a smooth, thick, glossy surface equal to 50 coats of varnish in one application. Polytex Resin finish is for interior use and can be used on painted or varnished surfaces (photographs too) (this is not a casting resin). Be sure to use in a well ventilated heated area. Kit includes detailed instructions, a bottle of Resin and a bottle of Hardener. This 16 ounce (pint) kit covers 4 sq/ft. Note: this product does have a shelf life - for best results use within 6 months of purchase.