lens replacement glue and dust cleaner

Good morning,

iv damaged just the glass lens on my iPhone 12 pro max i can see replacements available to buy but none of them come with any glue or adhesive other than the double-sided sticky on the lens which I don’t believe will be sufficient to keep my device IP68 (maximum depth of 6 meters up to 30 minutes).

Watching you tube videos on repairs (https://www.youtube.com/watch?v=FfBwFrX4... ) they all seem to use a glue which can be rubbed off at the end easily, can anyone advise what glue this is? Also a cleaning tac is used similar to blue tack to clean the camera before adding the lens, what is this item called so I can purchase it. Any help would be very much apricated. Recommend watching the video above to understand exactly what my need is.