By combining the abrasive power of small, hard particles and big soft particles, the Glaco Glass Compound Roll On is able to effortlessly remove even the to- ughest oily stains or remains of other coatings. A product best used for perfect preparation of the windshield before the application of hydrophobic coatings from the Glaco series as well as others! Directions for use: 1. Shake the can well 2. If the inner glass is dusted or dirty wipe it off with a microfiber cloth 3. Spray the product directly onto the glass, or onto a towel or paper, until the bubbles have disappeared, and spread evenly