IN & OUT® II water soluble release agent will aid in releasing concrete or gypsum plaster castings from rubber molds, Keeps molds clean, and significantly extends mold life. IN & OUT® II does not interfere with or affect surface detail and helps minimize air bubbles in finished castings. It will Not Stain / Soften Concrete or Gypsum surfaces. IN & OUT® II is mixed with water making it economical and will not affect color pigmenting of cast concrete. It also minimizes “Bug Holes” in concrete and air bubbles in gypsum castings.