Eurotiles Primer 540 406 is a water-based, emulsion co-polymer of styrene and various acrylic monomers that are milky-white liquids with an ammonia or acrylic odor highly used for priming areas that have a high alkali content. Its superfine particles easily penetrate into the base or concrete. It also reduces the chance of efflorescence which may result from the cement content of various bases. These products are used in concrete and roofing applications to improve or provide flexibility, heat sealability, salt stability and/or water resistance.