The tile supplier said to seal my porcelain but my tiler said not to why?
• The truth is porcelain is creating much confusion in the market place and many pages have been written to try to put all issues into perspective. The more questions you ask the more confused you will be. As a rule of thumb, textured and honed porcelain doesnt need to be sealed, but polished porcelain often does need to be. This is contrary to what may seem logical. The tiny pores that accept staining are created in the polishing process. A good penetrating sealer fills these pores and sets up good stain protection. The textured tiles generally just need a good clean because of the rough surface. If you are not sure, do a stain test. Get a sample tile or an off-cut and try to stain it with the things common to that area. If it stains, there is a benefit to having the tile sealed.