For direct food contact use mineral oil.
Can you seal concrete countertops with polyurethane.
If your countertops are made of concrete you need to seal them to avoid any damage caused by acidic food items like vinegar wine and mustard.
First coat will be absorbed into the grain.
Apply clear polyurethane to the countertop after the paint has had adequate time to dry and harden.
Polyurethane sealers are commonly used in high traffic concrete roads to provide strong resistance to staining and scuffs and applied on concrete countertops.
Polyurethane formulated for use on floors is tougher and resists scratches better than polyurethane formulated for use on woodwork and other similar applications.
They re suitable for both interior and exterior concrete and are ideal for decorative concrete.
Use at least three coats of a water based polyurethane.
Let me introduce you to a concrete myth.
It will be safe once its cured.
While in the past this may have been have been true sealers have come a long way from the simple wax and acrylic sealers once used.
Concrete is porous by nature which means that spills can stain and diminish its quality since liquids can seep through the concrete.
With the right sealer you can create a countertop that fulfills many of the essential functions one wants in a.