Duncan Ceramic Spray Sealers clear matte 12 oz. Ceramic Spray Sealers are final spray coatings that produce smooth, hard surfaces and are used to brighten colors and protect the finishes of objects decorated with nonfired color products. Super Gloss produces a gleaming, smooth and extremely protective final finish. This sealer provides the glossiest possible spray finish over both water-based and oil-based nonfired colors. No need to fire pottery pieces covered in this glaze as it makes your pieces more resistant to moisture for exterior use. Instructions on can, Made in USA