Personally, I wouldn't even consider it. If it melts both your meat & roasting tin are trash.
I also wouldn't consider it to 'distribute heat more evenly', it will start as a cold spot, then eventually become a steamer. It would probably prevent browning on the underside.
I'd consider it with the same scepticism I do most of the "clever hacks" I read on the interweb… based on hearsay, small test runs done by amateurs & incomplete information.
Unless it melts or tears, however, it's not actually unsafe.
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