This non-toxic sealer in used for clear glazing plastercraft or bisque after using acrylic paints. This is for non-firable items only. Not for food or water Brush-On Sealers produce a smooth, hard coating on your acrylic, nonfired projects. In addition to protecting your projects, sealers are used to brighten colors, too. Our nontoxic Brush-on Sealers provide the same excellent results as ceramic spray sealers and dry quickly to an invisible finish.