This product serves as a valuable solution for rendering exterior building surfaces water-repellent while enhancing their self-cleaning properties. It is well-suited for various exterior materials including brickwork, concrete, cement rendering, as well as natural or cast stone. This product aids in minimizing efflorescence arising from soluble salts in brickwork. Among its advantages, it offers ease of use as it comes ready for application, either by brushing or spraying directly from the container. Its versatility extends to its effectiveness on both old and new surfaces. Additionally, it boasts self-cleaning properties, resilient even in salt-laden atmospheres, thus reducing unsightly stains. Moreover, it serves as a protective shield for brickwork by lowering the risk of efflorescence. For concrete surfaces, it helps reduce the causes of cracking and crazing, whether in in-situ or precast concrete applications. Importantly, it is colorless, preserving the natural color and texture of the treated material, while allowing the surface to breathe.