MasonCare 300 is a pre-mixed pre-bagged Type O mortar specially designed for use in repointing work. This mixture is composed of Portland cement, type S hydrated lime, sand with a controlled grain size and other carefully selected components. MasonCare 300 meets ASTM C270 for Type O mortar, with the addition of water. This product is grey in colour, but can also be coloured at the factory. • Superior grip • Excellent vapor transmission • Superior handling • Self-healing properties • Low compressive strength • Pre-mixed, which reduces mixing time on site and increases productivity • Ideal for repointing • Can be used indoors and outdoors and in masonry projects requiring low compressive strength and superior workability • Do not use MasonCare 300 when an N or S mortar is specified. In these cases, it is recommended to use the KING 1-1-6 or the KING 2-1-9 • The temperature of the application surface and the mortar should be between 5 ° C (40 ° F) and 38 ° C (100 ° F) and maintained within this range for 72 hours after application. • Never add admixtures on site intended to modify the setting time, workability or any other property of the plastic or hardened mortar. • Use only the recommended amount of water to obtain the desired properties of the plastic or hardened mortar