A rubber trowel is a tool used for applying tile adhesive or grout to a surface during the installation of tiles. Unlike a traditional trowel, which is typically made of metal or plastic, a rubber trowel has a rubber or silicone blade. The rubber blade helps to spread the tile adhesive or grout evenly over the surface without scratching or damaging the tiles. Rubber trowels are especially useful for working with delicate or sensitive materials, such as glass or soft tiles. They are also suitable for use in tight spaces where a traditional trowel may be difficult to maneuver.