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.