Caulk, grout and joint compounds are used to fill joints, level surfaces, and seal or repair cracks. There are two basic types of products: leveling compounds and sealing compounds. Leveling compounds are highly viscous materials that are applied with a trowel. Examples include chocks, fillers, and mastics. Chocks are used during the installation of heavy equipment or machine bases to provide a level or plumb surface. Fillers are suitable for closing gaps or repairing cavities in parts, castings, and structures. Mastics are designed for filling gaps before other materials are applied. For example, they are often used to bond tiles to sub-flooring. Sealants are liquid compounds that contain fluids, prevent leaks, and block the ingress of unwanted materials. Typically, higher viscosity sealants are used when larger gaps need to be filled.
