In Digest 73, the various design considerations involved in providing a corrosion resistant floor were discussed. The materials for the floor finish are now considered. Timber floor finishes, which may be useful under some circumstances, are omitted. Jointless floor finishes can be concrete made with Portland or high-alumina cement, rubber-latex cement or synthetic resin-emulsion cement, or mastic asphalt or pitch mastic. Clay tiles or bricks are the only other type of material normally used in corrosive situations and for the more severe conditions are used more than any other material. They can be laid in one of several cements that possess varying degrees of resistance to acids and oils (shown in a table).