DAY1: A Finishing Aid And More


DAY1’s primary function is as a finishing aid. It uses advanced colloidal silica technology to improve finishability. The colloidal silica helps form more cementitious material. This reaction makes it easier to finishing the concrete, reducing drag on the tools and increasing workable time. After the slab has been finished, however, DAY1 continues to have positive effects.

Cold Weather Performance

Winter is hard on concrete. The dangers of freeze-thaw cycles and deicing chemicals are well known. Harsh deicing chemicals and repeated freezing can cause surface failures such as spalling. Use of DAY1 as a finishing aid helps to reduce the negative effects of the freeze-thaw cycle as well as deicing chemicals. When tested using ASTM C672 (Salt Surface Scaling) and ASTM C666 (Freeze-Thaw Resistance) standards, concrete samples treated with DAY1 showed remarkably better performance versus untreated concrete.

DAY1 makes it easier for concrete to resist these environmental threats. By increasing the amount of cement paste formed, DAY1 densifies the concrete and reduces porosity. This means moisture and contaminants are less prone to entering the cement matrix and causing damage.

Hard Wearing Surface

Commercial and industrial applications often subject concrete to high wear through abrasion and impact. Over time, these forces lead to damage and deterioration, reducing the functional lifespan of the concrete.

By creating more cement paste, DAY1 makes for a denser surface. While it is not a true densifier, it can have the desirable effect of improving abrasion resistance and impact resistance. Especially when applied at a higher rate (250 – 500 ft2 per gallon) and applied early during finishing, DAY1 can have a noticeable effect on the durability of the concrete.

Alkali Silica Reaction

Alkali Silica Reaction (ASR) is sometimes called “concrete cancer” for good reason. Essentially, a silica gel forms inside the concrete matrix when alkaline cement paste reacts, in the presence of moisture, with non-crystalline silica found in some aggregates. In cured concrete, the formation of the silica gel can cause structural failure.  

DAY1 helps mitigate the effect of ASR in two ways. First, it introduces silica into the mix at an earlier stage. Much like when using a pozzolan, ASR occurs while the concrete is still plastic. Therefore, the expansion of silica gel is more easily accommodated without fracturing the concrete. Additionally, the densification properties make it harder for moisture to penetrate the concrete. As the alkali silica reaction generally takes place in the presence of moisture, this naturally reduces risk.

DAY1 is primarily used as a finishing aid, but it comes with a whole host of additional benefits. When applied during finishing, DAY1 makes finishing easier and less problematic. It also has the added effect of improving concrete’s performance. DAY1 truly changes the face of concrete. Visit for test data and more.


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