It will be safe once its cured.
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.
For direct food contact use mineral oil.
Apply clear polyurethane to the countertop after the paint has had adequate time to dry and harden.
Apply stencils and faux finishes before sealing the countertop with polyurethane.
Use at least three coats of a water based polyurethane.
They re also applied to colored stamped or exposed aggregate concrete.
Polyurethane formulated for use on floors is tougher and resists scratches better than polyurethane formulated for use on woodwork and other similar applications.
Polyurethane sealers are commonly used in high traffic concrete roads to provide strong resistance to staining and scuffs and applied on concrete countertops.
They re suitable for both interior and exterior concrete and are ideal for decorative concrete.
Concrete countertops are stain prone and high maintenance.
Concrete is porous by nature which means that spills can stain and diminish its quality since liquids can seep through the concrete.
Let me introduce you to a concrete myth.