MASK-IT™ GEL Water Soluble Masking Gel Is Perfect for Blocking out areas that you do not want Patina or Dye Color to show. You can apply it in a random pattern & color around the gel with patinas and/or dyes, rinse the Masking Gel away to Leave a very unique pattern. You can also leave it on overnight & it will dry to a solid, plastic-like finish, adding depth and texture to the entire piece. Tip: The Heavy Masking Gel is Light Blue & The Extra Heavy is Clear. Both the Heavy Gel & Extra Heavy Mask-It Gel dry clear, but before applying it, you can add a few drops of DYE to create textured, colored areas. Water-Soluble, Rinses away easily with water, which will have no effect on the patinas or dyes. Dry the whole piece quickly with clean, dry compressed air & clear-coat. 16 Oz. Jar.