Using the Perrin Performance reservoir cozy is a breeze. Just stretch the foam ring over your master cylinder reservoir. That's it! It'll start protecting your engine bay from brake fluid spills right away. When it comes to maintenance, there isn't much to do. Just check it regularly to make sure it's still in good condition. If you notice any signs of wear or damage, you might want to replace it. Also, remember that this cozy is designed for specific models. Make sure your car is one of the compatible ones listed before installation. With proper use, your reservoir cozy should last you a long time thanks to the 5 - year manufacturer warranty.