Plastic welding

[darrsi]

Also, super glue mixed only with baking soda, or even white polystyrene can have some unusually tough final mixtures, but watch the videos online to give you a much clearer idea how and where to do things. 

If you're going to do the superglue and baking soda technique, make sure you get decent quality components.

I tried it with some superglue from Poundland and baking soda from eBay and it didn't work well at all

The last unbranded "super glue" I bought was a bottle from Temu, which I thought I'd try our as it was so cheap, which turned out to be a Chinese copy, literally, but I used that with standard supermarket baking soda and fixed a plastic lug on a house security camera and it worked a treat and is still solid.
The camera is removed every few months to give the rechargeable battery a full boost as it is a solar powered unit, and I make a point of checking that specific lug and it hasn't budged at all. When you slide the camera onto the wall mount it is held in place by the two lugs so it does have a bit of pressure on it too.

Maybe I'm just imagining it, but I don't find the original branded Super Glue to be as strong as it was years ago, unless you plan on sticking your fingers together which it manages to do quicker than anything else.
On that note I was told a tip where you should very lightly dab surfaces with a wet sponge before using in as the glue sticks much better to a very light coating of moisture. This would also explain why it sticks to skin so easily and quickly due to moisture in porous skin.

Thanks for that information does the baking soda/ graphite dust give the glue strength or does it become part of a chemical reaction?

I guess it is not like welding where you try and match the weld within the original material

Not actually sure about the science behind it all? All i remember was that the combo of baking soda, powdered pencil lead and superglue became extremely strong, so as mentioned you need to get the shape or levelling of whatever you're fixing sorted out sooner rather than later..
I've even seen cigarette ash have superglue added to it, and even the filter of a cigarette to fill a hole with. Once the filter has super glue added and it solidifies it can then be reused to put a screw into it if the hole was becoming a bit loose beforehand.