An acidic special silica sol of milky-white appearance. Extremely high charge intensity, thus particularly economical application of the product. Besides charge intensity, specific particle size and surface structure result in an extremely reliable efficiency along with highly economical use. Silica sol is a natural product in which, due to the high charge intensity, temporary agglomeration could occur leading to slight thickening of the product. For this reason, prior to application, shake the silica sol well or stir the silica sol intensively. Purity and quality are proved by specialized laboratories.