How does Xypex work?
When a cement particle hydrates there is a reaction between water and the cement that causes it to become a hard, solid mass but there are also chemical by-products given off which lay dormant in the concrete. With Xypex we introduce a second set of chemicals. When we combine the by-products of cement hydration and the chemicals in Xypex in the presence of moisture, a chemical reaction takes place and the product of this reaction is a nonsoluble, dendritic, crystalline structure. This crystalline structure can only take place when moisture is present and thus Xypex tends to form this crystalline material in the bleed water tracts, capillary tracts and shrinkage cracks in concrete. Wherever water is present, Xypex will form.
