Clear Acrylic-This is a durable, all weather protective coating that gives a tough, transparent, flexible film that's watertight and will not yellow. It can be used to protect and enhance other finishes such as fluorescent coatings, and is also effective in insulating electrical systems. Heat Shield-PLASTI-KOTE's Heat Shield comes with a tough matt black finish to provide durable protection for surfaces subject to high temperatures. It is heat resistant to 425ºC making it ideal for boilers, furnaces, exhaust pipes, chimneys and many other applications. It will not crack, bubble, peel or fade.