Kemiko® Repels is a 0-VOC, extremely user-friendly, waterborne silane/siloxane emulsion for sealing Kemiko Stone Tone Stained concrete and other cementitious substrates. Kemiko? Repels is a water viscosity, single component product that is fomulated to repel water, reduce efflorescence and frost damage, allows substrate to breathe, has very little or no odor, does not contain solvents, and preserves stained concrete color. Kemiko? Repels is resistant to UV and high alkalinity exposure.