Proseal Nano Proseal Nano is a stone sealer formulated specifically for quartzite material. This solvent-based impregnating sealer also works on many other natural stone surfaces including: * Quartzite * Marble * Limestone * Travertine * Concrete * Agglomerates * Terracotta * Onyx * Slate * Granite * Sandstone Proseal Nano Quartzite stone sealer is an excellent stone sealer for glossy and polished surfaces even if the stone has a higher absorption rate. It penetrates and settles into the material's micro-pores and protects the stone from all kinds of dirt. Additionally, Proseal Nano won't alter the look of the stone or affect its breathability Proseal Nano Advantages There are many advantages to choosing Proseal Nano Quartzite sealer.