Mosaic Backsplashes Difficult to Clean By Mark Q & AJanuary 11, 2016Edited by Admin0 Back to Home Mosaic Backsplashes Difficult to Clean I heard that mosaic backsplashes are quite difficult to clean. Is there any kind of sealant I can use to make sure that it does not get dirty in the first place? Answers By Interstone Marble and Granite LimitedFebruary 10, 2016 11:58 AM Firstly, know that nothing is perfectly stain proof. Are we talking about natural stone backsplashes here? Because they should definitely be sealed. If you grout them, use un-sanded grout and seal them again. Back to Home