You can either use a precut adhesive for your specific model or take pieces of adhesive ([link|https://www.ifixit.com/Search?doctype=product&query=61395#|from a roll or a sheet|new_window=true]) and apply it to the back cover after having removed the previous adhesive. Re-using the original adhesive on your back cover probably won’t work since it has likely been deformed or weakened.
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You can either use a precut adhesive (dye-cut) for your specific model or take pieces of adhesive ([link|https://www.ifixit.com/Search?doctype=product&query=61395#|from a roll or a sheet]) and apply it to the back cover after having removed the previous adhesive. Re-using the original adhesive on your back cover probably won’t work since it has likely been deformed or weakened.
You can either use a precut adhesive for your specific model or take pieces of adhesive ([link|https://www.ifixit.com/Search?doctype=product&query=61395#|from a roll or a sheet|new_window=true]) and apply it to the back cover after having removed the previous adhesive. Re-using the original adhesive on your back cover probably won’t work since it has likely been deformed or weakened.