Marble is a porous material, which means it can easily absorb liquids and become stained or damaged. Without sealing, even small spills like coffee or oil can leave permanent marks. Professional Marble Sealing Services NY applies a protective coating that prevents liquids from penetrating the surface, keeping your marble safe from stains and etching. Marble is a porous material, which means it can easily absorb liquids and become stained or damaged. Without sealing, even small spills like coffee or oil can leave permanent marks. Professional Marble Sealing Services NY applies a protective coating that prevents liquids from penetrating the surface, keeping your marble safe from stains and etching.