It is completely safe to apply an impregnating sealer to stone kitchen countertops. According to a report by the USDA, once the sealer cures it is safe to use in food areas. Wait approximately 24 hours after application before preparing food in the area to allow for the solvents to evaporate.
TIP There are many new impregnators and sealers on the market today and it is impossible to know if they are all safe. Stonecare PRO Signature Impregnating Sealer is one that is considered safe. For other sealers, I would recommend checking with the manufacturer and check for USDA approval.
Article ID: 688
Created: January 21, 2022
Last Updated: January 7, 2023
Author: Pam Freitag
Online URL: https://sr-manual.com/kb/article/why-impregnators-are-safe-for-food-prep-688.html