Place a teaspoon of water on the intensively cleaned or untreated dry surface. Time how long it takes for the water to fully absorb.

• High Porosity - Water is absorbed within 5 minutes: 4 coats of sealer required in normal conditions.
• Medium Porosity - Water is absorbed within 15 minutes: 3 coats of sealer required in normal conditions.
• Low Porosity - Water is absorbed within 1 hour or longer: 2 coats of sealer required in normal conditions.