Hi there. I believe you meant the water resistant adheasive that have on new iPhone 6s. So here are the link for that adheasive :) I hope that helped you out. https://www.ebay.com/itm/191933751702 And here are installation guide: https://youtu.be/3xGeLDMS2ek
I had the same problem after replacement of backlight filter (FL2024) on iPhone 6. I cleaned the board with isopropylalcohol and make sure that the screen connector is properly connected that solved problem in my case. I hope that helps your too.