PRIME SHIELD is a low-VOC, water-based penetrating sealer designed to dramatically improve the stain resistance of concrete, exposed aggregate, bricks, and natural stone surfaces, all without altering the surface slip rating.This advanced sealer works by changing the surface tension to block water and oil-borne contaminants, helping protect against stains from tannin, coffee, cola, chewing gum, sauces, vegetable oils, and other inorganic substances. Its hydrophobic action makes residues easier to clean and prevents long-term staining.Once applied and dry, PRIME SHIELD forms a virtually invisible protective layer, creating a barrier against dirt, grime, and everyday wear, keeping your surfaces looking pristine and well-maintained.