Unsanded grout is a type of grout used primarily for filling joints in tile installations. It is made from a mixture of cement, water, and fine sand, but it does not contain any coarse sand particles. This makes it ideal for narrow joints, typically less than 1/8 inch wide, as it can easily flow into tight spaces without clumping. One of the main advantages of unsanded grout is its smooth finish, which helps prevent scratching on delicate tiles like ceramic or glass. Additionally, it is less likely to shrink or crack over time, making it a reliable choice for various indoor applications, including countertops and backsplashes.