The heat is spread over a large area compared to COBs so heat transfer isn't a big issue and common tapes are probably ok. Just don't use foam mounting tape!
I have read of a couple people having problems with the 3M thermal tape.
I use this but heard removal is difficult, some adhesive remover or lacquer thinner should work. Cold be the same situation with many tapes.
https://www.ebay.com/itm/BCP-1roll-20mm-x-25m-Double-Side-Adhesive-Thermal-Conductive-Tape-for-Heatsin-/172840360998?hash=item283e169c26
Next time I'll try dirt cheap heat sink paste and screws or even zip ties. I'll test between mounting with and with out TIM when I get more strips.
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