Sam's Detailing Glass Sealant 100mlAn extremely hydrophobic rain repellent for glass that significantly improves visibility in poor weather conditions. Effects last for up to 6 months on a front windscreen and 12 months on side windows. 1. Remember to always test the product on an inconspicuous area first. Ensure the glass is cool to touch. 2. Spray onto the glass and then wipe down the solution in straight lines. 3. Use a second clean glass towel to buff the glass to a crystal clear