Planiseal VS is an alkali-resistant, two-component, 100%-solid, epoxy coating that when applied to slab surfaces effectively stops moisture-related problems with floor coverings. Moisture vapor emission rates (MVERs) of up to 25 lbs./1000 sq. ft./24 hrs. are reduced below the limit of 3 lbs./1000 sq. ft./24 hrs. required for many types of finished flooring, when the designated film thickness is applied. Mapei.