Citadel Ultra-Hydro Stop MVB

Citadel Ultra-Hydro Stop Primer is a professional moisture-vapor-barrier (MVB) epoxy primer system designed for use on damp and green concrete prior to resinous floor coatings. The line includes two options to match project conditions: Ultra-Hydro Stop Primer, a two-component, 100% solids epoxy designed for high moisture mitigation, and Ultra-Hydro Stop Water Based Primer, a two-component, water-based epoxy formulated for early-install schedules and low-odor applications.

100% solids Variation: self-leveling, fast-setting epoxy primer that provides excellent adhesion and high moisture mitigation—when applied at the specified film build, it reduces vapor emission on moisture-laden slabs (meets ASTM F3010 requirements).
Water-based Variation: 50%-solids epoxy primer for moisture control with excellent adhesion to damp concrete; can be applied as early as 48 hours after placement to help reduce job-site downtime.