QUIKRETE® Thermo-Lube (#1905) is an accelerating admixture liquid for concrete and mortar in cold weather, hastening the hydration of Portland cement which enables the cement to harden before freezing. It is a winter admixture that provides thermal characteristics required for a faster set and increased early strength. Reduces the time that fresh concrete or mortar needs to be protected from freezing. Keeps concrete and masonry work moving.