I’ve read about boiling plastic parts in water for a minute or two to achieve this - obviously you want to try it out on something you don’t care about first and suspend it somehow so it’s not touching the bottom of the container.

JB Weld would be good to reinforce/repair the plastic that’s already cracked.

Regular JB Weld is brittle and quite frankly sucks even for metal repair.
QuickSteel putty works way, way, way better for metal repair. It bonds better and doesn't crack like JB Weld does.

There is actual plastic repair epoxy that works very well for repairing plastic.. imagine that.

JB Weld makes some:
https://www.jbweld.com/products/plasticweld-syringe

Loctite makes some:
http://www.loctiteproducts.com/p/epxy_plstc_s … stic-Bonder.htm

britain4 wrote:

I’ve read about boiling plastic parts in water for a minute or two to achieve this - obviously you want to try it out on something you don’t care about first and suspend it somehow so it’s not touching the bottom of the container.

This only works with nylon, AFAIK. With thermoplastic plastic it will lead to parts being deformed.

Plastic brittling and deformation are things you can prevent or delay but not things you can really fix after the fact.

Thankfully we are in the age of 3D printing so whatever it is that is giving you issues get it scanned and reprinted. 😎

You would need to re-add the plasticizer back that vaporizes over time to achieve that. It's certainly possible.

I hate that the plastic on old laptops are crumbling. the plastic on the screen part of my Gateway Solo 2500 just snapped so it's now a "Half-top". the LCD panel is fine.