SurfEtch™ is a water-based, biodegradable, low odor micro surface retarder designed to lightly etch the surface of concrete. Applied to the surface of new concrete following the finishing process, SurfEtch™ delays the set of the top layer of concrete while allowing the underlying concrete to hydrate normally. Once washed off, SurfEtch™ produces a simulated light sand blasted surface exposing the aggregate from 1/16" to 1/8". Apply SurfEtch™ on gray concrete or concrete colored with Uni-Mix® Integral Concrete Colorant or Uni-Mix® Liquid Integral Concrete Colorant. Use on poured-in-place flatwork: curbs, sidewalks, driveways, patios, pool decks, tilt-up and precast panels, and most horizontal concrete installations.