Sealing Granite Kitchen Countertops. If it beads up quickly, your seal is good; however, if For kitchen countertops, diluted bleach has been the go-to standard for many years. It doesn't take much bleach to do the job; the solution needs to be.
Counter-Seal is a relatively new product that allows you to undermount a sink in a laminate top. Ventilate the kitchen area well, and use gloves and a face mask for personal protection. AsktheBuilder.com: Granite sealer is to granite as urethane is to hardwood flooring.
We have granite countertops in our kitchen and love them.
Get a good-quality granite countertop cleaner, a granite sealer that's designed to resist water and oil-based stains, and some clean rags.
And the granite in countertops has been sealed to make it stain-resistant. Ventilate the kitchen area well, and use gloves and a face mask for personal protection. There is a simple test that you can do to determine if your countertops need to be sealed.