Mortars Mortar M 7.5 Dry 800 Dry mortar manufactured according to Standard 998-2 (Masonry Mortars) designed for use in general masonry work, both indoors and outdoors. Manufactured with Type I / 42.5 R cement, limestone aggregates and inorganic additives. TYPES M-7.5 Gray M-7.5 White M-7.5 Waterproof M-7.5 with Cal View