ER changes the chemical composition of the mix-water is such a way that almost all of the Calcium Hydroxide in utilized. ER is an easy to use product that will dramatically reduce or eliminate efflorescence, improve resistance to freeze thaw cycles and create a high performance motor that has exceptional work-ability. ER is made of only natural ingredients that are non-toxic and environmentally friendly. Available in five gallon pails that produce 55 gallons of mix water, simply pour into a 55 gallon drum and fill water. ER is by far the least expensive way to make an impact on your next project.