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xkcd #3194: 16 Part Epoxy
(imgs.xkcd.com)
Title text:
Some surfaces may seem difficult to glue. But if you research the materials, find tables of what adhesives work on them, and prepare your surfaces carefully, you can fail to glue them in a fun NEW way that fills your house with dangerous vapors.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3194/
Once applied, it can be gently shifted into any direction that makes alignment worse.
Upon which it instantly hardens, preventing you from shifting the parts back into alignment