Weber Matvar 53? Varnish
A colorless, quick drying acrylic resin varnish, Matvar 53? will impart a flexible matte finish on oil, watercolor and tempera paintings. It will not dull tonal values and because it contains no wax, it can be painted over. It is resistant to cracking, peeling and blooming, and will not smudge from handling. Brushes clean up easily with turpentine. Turpenoid cannot be used with this product.