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Asked by 725kgrf46 to Iona, Yip on 12 Jun 2016.
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Iona Strawson answered on 12 Jun 2016:
I think because of the lid. It stops the air getting in and drying the glue. If you left the top off for long enough it would dry eventually, although the amount of glue also slows this down.
Or its magic. Probably more likely magic.
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Man Hang Yip answered on 13 Jun 2016:
I think it has something to do with air.
The glue needs to meet air to start sticking to something.
Comments
Jarrod commented on :
There’s a nice podcast (called ‘surprisingly awesome’ all about glue here: https://gimletmedia.com/episode/7-adhesives/
Octopus Prime commented on :
Actually sometimes it does get stuck on top of the lid, maybe it is due to the amount of contact?
Jarrod commented on :
There are some materials glue does not stick well to – glue either needs to react chemically with something or else it needs to soak into the pores. I was trying to glue silicone last week, and eventually had to buy special glue to do it!