Copper tape is used for electromagnetic shielding to seal gaps on RFI sensitive enclosures and can be used to fix & seal ITO coated windows into their apertures. There are other uses of course, but two quite surprising applications spring to mind.
Conductive paint contains nanoparticles of metal such as copper or silver or malleable soft metals that are highly conductive or will support a higher current transmission, within a solvent-based liquid. The nanoparticles are thin to maintain the wetting and binding feature quality of regular paint.
Charley Boorman, best known for his travel show “Long Way Round” with Ewan McGregor has spoken in the past of his love for biking around Africa. When the pandemic hit the area, Charley felt obliged to contact Diamond Coatings regarding a school in a small township on the edge of Cape Town.