Looking for a lightweight material that will reflect heat from flame?

[jamieukguy147]

I currently have tiles on the top of my bioethanal fire.. It works well, but I notice heat is transferring through and warming my TV and soundbar more than I would like.

What metal type material? That's thin and lightweight could I glue to my fire roof to reflect heat back into my room and extra protect my devices above

Please see pic

https://flic.kr/p/2h24jYt
Thanks

 

[SandburRanch]

Heavy Duty aluminum foil.