The sealing process is the same both before and after grouting.
Work in a well-ventilated area and put on gloves to protect your hands. Wear a ventilator mask so you don’t breathe in the chemical fumes. [4] X Research source
Many pros recommend Miracle Sealants 511 Impregnator Sealer for marble tile. Other great options include Tuff Duck Marble Sealer and Tenax Marble Sealer. [6] X Research source Read all of the instructions on the product you’re using before you start.
For an easier application, you can put the sealer in a spray bottle, set it to mist, and spritz it on the backsplash. Use a chamois to wipe off any drip marks. [8] X Research source Don’t worry about thoroughly sealing the grout at this point. While it’s fine to spritzer or wipe the sealant on the grout now, you’ll go back later and make sure all the grout is sealed.
If you wait too long or apply an uneven coat and end up with streaks, just apply more sealer and buff it off immediately.
Your specific sealer may also require 2 coats, so be sure to read the instructions and apply another coat if necessary.
Trim the edge of the caulk tube at an angle before you apply the product. This makes it easier to get the caulk right into the groove. It can help to run painter’s tape along both edges of the caulk. Once you’ve applied the caulk, run a wet finger over the product so it goes right into the surface. When you pull the painter’s tape away, it’ll leave a nice, clean line. [13] X Research source
Avoid using any cleaners with acid or vinegar in them, as they can etch the surface of the marble. Acidic foods or drinks like lemon juice, coffee, and alcohol can also etch the surface of the marble if they aren’t cleaned up right away. Wipe up spills or splashes immediately to keep your backsplash in the best shape.
