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.
The advent of retarding agents make exposed aggregate a more attractive design option. In the past, exposed aggregate finishes were achieved by broadcasting stone over wet concrete and pressing it in or by removing (mechanically or with acid) the surface of cured concrete. These were labor intensive and/or yielded inconsistent results. Chemical retarders eliminated these concerns. They prevented the cement reaction at the top of the slab and making it easier to remove the paste. This process was further simplified by retarders with set depths, such as Surface Deactivator.