Citadel Polyurea Coatings introduced its new Ultra-Hydro Stop H2O Primer. A water-based version of the Ultra-Hydro Stop Primer, UHS H2O includes innovations to save installers both time and money the company said. UHS H2O is a two-component, 50 percent solids, water-based epoxy primer. It cures in six hours, half the time of its predecessor, and doesn’t need scuff sanding prior to re-coating. As a water-based formula, it can be safely applied to diamond ground concrete, eliminating the need for shot-blasting to profile. Ready to be applied with a roller or squeegee only 48 hours after concrete placement, UHS H2O saves time and labor both before and after use.