It was not effective in sticking the screen externally (that is, it had come off in one corner, the glue covered it initially, but after 2-3 days it came off like 'rubber strings').
After 2 weeks the tube had dried up and was completely useless

finally the phone cover stuck and does not come off finally just be careful not to let it slip because you must immediately use alcohol and a cotton swab or cotton to remove it because if it freezes not that it won't come off just you will have a hard time so as soon as you put it on within 10 minutes at most clean any residue it has strong glue

I got it to replace the screen of my amazefit bip that came off after 3 years, obviously due to low-quality adhesive. The application was very easy thanks to the narrow metal nozzle that allows you to control the flow and quantity. Any residues can be cleaned with a damp cloth while it is still wet. The result is very clean. One positive aspect is that the cap has a metal spike to prevent the nozzle from clogging.