What Damages Concrete Countertop Sealers?

Will hot pans damage my countertop sealer?

We often hear this question from customers inquiring about concrete countertop sealers for their kitchen and outdoor kitchen countertops. Excessive heat can do some serious damage to a countertop as can be seen in these pictures submitted by a customer. While we always recommend exercising a reasonable caution while using sealed countertops, placing hot pans straight out of the oven directly on the surface is an absolute no go.t.

In this example, the countertop was sealed using the  epoxy and polyurethane sealers for an outdoor kitchen next to a pizza oven. Firstly, epoxy coatings should not be used outside because they will yellow with extended exposure to sunlight and they typically do not handle extremely cold temperatures well. Secondly and most importantly in this case, the customer removed his steaming hot pizza pie pans from the oven and slid them across the countertop surface. Eventually the coating melted and the damage in the photos occurred. The solution was to strip off the sealer, re-seal and never put hot metal pans on the countertop again.

Heat Damage to Countertop Sealer

How to Safely Use Concrete Countertops:

1. Never place oven or stove hot pans directly on the countertop surface. Potholders will prevent damage from occurring in most cases.
2. Don’t drop objects from a great height on to the countertop surface. Dropping items can cause chipping or cracking if the object is heavy or sharp.
3. Avoid harsh cleaning chemicals. Strong chemicals can cause sealer discoloration and flaking. A mild dishwashing soap will most always do a more than adequate job cleaning countertops.
4. Use a cutting board not your countertop. For best results, cut nothing on the surface of your countertop.


Wear and tear over time for a sealer is normal. Nothing lasts forever but careful use of a polyurethane sealed countertop will yield 5-7 years of use before a scuff, clean and recoating would be necessary.

Damaged Concrete Countertop Sealers:

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