There are a few commercial grade windshield treatments available that really benefit vehicle owners. They have several benefits:
When driving in heavy rain the wipers will be able to clear the windshield easier. If a big truck is approaching, as it passes the sudden spray simply blows right off the windshield so you do not lose your vision but for a second. When properly installed it can last several months. Your vision in poor weather is dramatically improved with this type of treatment.