I don't think its heat rated. I bought some to spray a non related item and was surprised by the color. I have used it on a few engines, it looks great and sticks well. The latest engine has 4 hours on the test stand and 800 miles in the car, there is no discoloration or peeling. I run my Hemiis hard, I would think it would have failed by now. I'll try to remember(I'm old as dirt) to bring the # off the can to post here.