Rodela rubber is the flexible, rubberized surface of a plastering or finishing trowel designed for construction and home improvement. Its primary purpose is to apply, spread, and smooth plaster, cement, and other finishing materials, creating an even, high-quality finish on walls, ceilings, and floors. The rubber construction is crucial for preventing damage to surfaces and for providing a smooth, clean finish, especially on delicate surfaces or for tasks like grouting tiles.