AC300 Water-Repellent Impregnating Treatment (1L) for Bricks, Cotto, and Terracotta

Porous materials like cotto, terracotta, bricks, and certain stone surfaces can absorb large amounts of moisture during installation or everyday use. This can lead to stains, efflorescence, salt deposits, peeling, algae growth, and dark, damp marks. The Faber AC300 Water-Repellent Impregnating Treatment helps prevent these issues by penetrating deeply into the surface and adding strong water-repellent properties without altering the natural appearance or tone of the material. Because the formula is water-based, breathable, and non-film-forming, it allows vapors to pass through while protecting the substrate from rising damp and external moisture. It's especially useful before installation, since it reduces absorption during grouting and makes washing and final cleaning easier. The treatment works on cotto, terracotta, bricks, marble-cement agglomerates, concrete tiles, tuff, and other porous stones used indoors or outdoors. 32 fl oz diluted 1:2 can cover roughly 321-480 square feet. It maintains adhesion to grout and adhesives, ensuring that installation proceeds normally while still benefiting from reduced moisture uptake. Once applied, AC300 enhances durability by minimizing salt-related whitening, surface erosion, algae or mould growth, and the visual darkening associated with trapped moisture. Its UV-resistance also helps preserve the surface during long-term exposure. In residential or commercial settings, AC300 improves the performance and appearance of porous materials throughout both installation and maintenance.

• This water-based treatment is a breathable stone sealer that penetrates deeply to repel water and moisture
• It supports pre-install workflows where a dependable grout sealer or tile sealer might help protect porous materials
• The formula works well with high-quality adhesive, since it doesn’t interfere with bonding during installation
• It provides long-term floor protection on bricks, cotto, terracotta, and other porous surfaces
• Moisture issues like salts, algae, or efflorescence become easier to manage in most home improvement projects