New heatshield for the firewall

[M3Driver]

I used an aluminum and poly type material that was easy to form and clue. has great sound reflection and heat reflection. Comes in a roll about ten feet by four feet. great for floors trunks etc. paid 30.00 off internet the company is Texas

Would you mind sharing an update on how well this has held up? I am considering something similar but am worried that the insulation may droop or otherwise fail when installed on the exterior of the car.