PlasterSeal Plus enhances the moisture resistance of plaster surfaces on horizontal flooring & countertop surfaces. Applying thin, even coats will achieve a smooth and consistent finish. It may also be necessary to apply additional coats to build up the desired level of protection and gloss. Protective Topcoat for Meoded Concretta applied on flooring or countertops Applied after 1st coat of Meoded PlasterGuard Easy two (2) part waterborne urethane application Interior or Exterior Use When you receive your order, the bottles may appear short-filled, but the amounts are approximate ratio required for the mixture. The "De-Ionized Water" is simply distilled water for dilution. If you feel an additional amount is necessary, it will likely be easily purchased at a local grocery-hardware store.