Plaid Enterprises, Inc. Clear Acrylic Sealer Aerosol Spray, Matte This clear, waterproof sealer produces a non-yellowing finish Used as a fixative for pastel, charcoal and pencil drawings, on full-color or hand color prints to prevent bleeding It can also be used over water base and oil base paints, glazes, laquers and varnishes Patricia nimocks sealers are nonyellowing and protect projects with a durable finish Available in matte finish