It is made by heatshield products it is good for up to 1800' F more information and products can found here heatshield products I know some supra guys who have been using this stuff for years with very good results. Now I know a Z is not a supra however never hurts to try a play out of someone else's play book. I will be sure to keep a close eye on these check with my thermal gun and if I see any problems then they will go bye bye. Thanks for your concern.