How to affix radiant barrier to metal garage door
 

I have a metal garage door facing the afternoon sun, and my garage is situated directly under a part of the upstairs living quarters (master bedroom, specifically) - the inside of the garage door is unbearable to touch during the afternoon.

So I bought a roll of that radiant barrier stuff, basically it's bubble wrap with a layer of mylar on either side of it.

Now... how do I stick it to my garage door? I was thinking 3M 90 but that stuff is only adhesive up to about 140F and then wants to get sloppy.

Any other ideas? HVAC tape?

Sheet metal screws with big plastic washers.

I have a garage door that faces the same direction. I slid rigid insulation into the back and then fastened it in place with foil tape. The foil tape stuck to the metal but eventually failed to hold on the foam. I think you might have the same problem with the foil tape. It may be worth a try anyway. What about high temp silicone adhesive?