It goes without saying that natural stone countertops are an investment; not just of money, but also of care. However, if you take good care of your natural stone surfaces such as granite or marble, they will remain strong and beautiful for decades.
Wipe the Countertop Clean
Before applying a stone sealant, wipe the countertop clean with a disinfectant and dry it with a clean rag. Allow the countertop to sit a few hours after drying.
Apply the Sealant
Using a clean rag or brush, apply the relevant stone sealer to your natural stone countertops one section at a time. Wait about five minutes for the sealer to seep into the stone, and then apply another layer. Wipe off with a clean cloth. Repeat this step on the remaining sections.
The Marble Institute of America states that it is unnecessary to seal granite, as it has natural stain-resistant properties. However, many prefer to still seal it to enhance the resistance. Keep in mind that lighter-color stones tend to be more porous than darker ones, which may mean that you will need to reseal them more frequently. You can tell if your marble or granite countertops in Pasadena need to be resealed if you notice water or other liquids absorbing into the stone (rather than beading up on the surface).