The benefit of color sealer is that it protects your grout from staining. Your grout is porous which means that it has very tiny holes in it that absorb liquid and dirt. Once you spill anything on your grout the porous holes suck up the liquid and dirt and will cause staining on your grout. It is next to impossible to get your grout to look brand new again once it is stained and not sealed. This is where color sealer comes in. The color sealer clogs those porous holes and acts as a protective paint layer at the top of your grout. So if you spill anything on SEALED grout, the liquid or dirt will stay on top of the color sealed surface and wipe right up without any staining on your grout. Essentially, once color sealed, your grout will stay looking like new no matter how bad you beat your grout up.