Grout is a porous compound and it easily absorbs spills and dust, just like your carpet does. Grout sealing process uses a sealant on the grouts to create a protection layer. This practically buys you more time to clean the soil and spills from your grouts before the porous material absorbs the same. In short, it provides stain resistance to your grouts. Ask our experts for the best suitable grout sealant for better stain resistance.