Sealing Concrete Floors Moisture. If a concrete floor has no vapour barrier below it or if the concrete has not sufficiently dried waterproof sealers such as most epoxies are can bubble and peel as moisture rises from below. Concrete is a porous material which will accept water moisture and water vapor readily from the foundation soils beneath pole barns.
Some concrete sealers are breathable and will let moisture pass through others are not. Apply the First Coat Apply the first coat and wait at least two hours before applying the second. There are millions of tiny capillaries within the concrete substrate.
Sealing concrete is both a protective coating for the concrete floor from above and an additional moisture barrier for anything installed on top.
Sealing or applying overlays is not recommended any time the concrete surface temperature is within 5 degrees F above the dew point at a given air temperature and humidity level. Sealing or applying overlays is not recommended any time the concrete surface temperature is within 5 degrees F above the dew point at a given air temperature and humidity level. Sealing concrete is both a protective coating for the concrete floor from above and an additional moisture barrier for anything installed on top. Depending on how porous your concrete is a gallon of sealer will cover 250 to 500 square feet.
