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Sanded grout contains particles of sand, making the grout more resistant to cracking. This durability makes sanded grout well suited for tile floors. It is also less prone to thinning out and forming bubbles when it cures, so you can spread it into larger joints.

Unsanded grout is much smoother, so you will want to use it when working with tile made from glass or polished stone. Any sand could leave scratches on the tile’s surface. The lack of sand also makes unsanded grout thinner, making it best for tile joints that are less than one-eighth-inch thick.

No, grout haze will not go away on its own and needs to be removed as soon as possible after installation to preserve the beauty of your new tiles. If left too long, grout haze can leave a permanent film on newly installed tiles, leaving them dull and cloudy.

Most grout sealers last one to two years before they need reapplication. For wet areas such as a bathroom or shower, you should reapply grout sealer at least once a year. In areas of your home that don't see as much moisture or traffic, the grout can go up to two years before it needs resealing.

Grout is a type of material that fills the joints between tiles to promote stability and prevent water damage and debris from collecting between tiles. Most grout is made from cement, but you have other options, including epoxy, acrylic, and polymers that can give grout different properties that best protect your floor, bathroom, or kitchen tiles.