Metal strips on Atrium UPVC Windows

[Devonboy59]

Hi,
I was cleaning my atrium windows (as you do) which are modern UPVC double-glazed units. At the bottom of every window, about 2 inches up from the base, there is a metal/foil strip which I presume is for heat management (see picture) and a few of these are peeling off or broken. My question is what tape is this? What should I buy to use to replace the broken strips?

Thanks