From the manufacturer:
Durable, clear coating that seals prints! Also works with paint, lacquer and varnish. This package contains one 12oz spray can of clear acrylic aerosol sealer. Comes in matte and gloss finishes. DANGER: Flammable. Vapor Harmful. Skin Irritant. Eye Irritant. Conforms to ASTM D 4236. Made in USA.