Looking for any advice on fixing a broken circuit

[IanB]

something like a hot glue

Remember it's a thermal fuse, and hot glue is hot, so putting hot stuff in contact with a thermal fuse might not be such a good idea 

[Nixsnow]

So i've been looking around everywhere, and these thermal fuses seem to be pretty hard to come by in my region. Pretty much everyone I've called locally only sells fuses for 10A, nowhere near the 2-3A i need.
The closest I've found is a radial one, but I'm not quite sure if the 'body' is metal as advised against, i think it's plastic but i can't be sure?:

https://www.communica.co.za/products/rh01-125?variant=19917497663561

Also i'd have to sleeve the connectors, but my only experience with that is using heat-shrink, but i assume that would be a terrible idea given it's a 'thermal' fuse. So would i just use something like insulating tape? I've never done something like sleeving a wire, so I have no idea if there's a more common method that i just have no knowledge of.
I did find an insulated fuse on another site for the entire continent, but for some reason its 20x the price, so I'd prefer to go the cheaper route if i have to buy more than one just so i don't break the bank if i ruin a fuse or two trying to solder it back in.

As for the silicon sealant, that's another headache. I know the purpose is for placing the fuse inside the inductor, but I'm not sure if it's supposed to transfer heat or avoid it, or be conductive vs. non-conductive, so there's one or two options but I'm not sure which one is the most appropriate:

https://www.communica.co.za/products/silicone-spray
https://www.communica.co.za/products/wlp10g

If neither of these work, I'll try and get some normal automotive sealant from a nearby hardware store, but i figured the electronics seller might have a bit more of a specialized version.

[IanB]

To sleeve bare wires, remember that heat shrink tubing does not have to be shrunk. If it is the right diameter you can just slip it over the wire and be done with it.

For silicone sealant, the most important factor would be to get neutral cure sealant. Many silicone sealants release corrosive acid when they cure, and you don't want to use this near to metal or electrical parts.

https://siliconedepot.com/blog/do-you-need-acetoxy-silicone-or-neutral-cure-silicone/

[james_s]

As I said, despite hearing everyone warn not to I've used ordinary bathroom caulk silicone on electronics many times, the stuff that smells like vinegar, and I've never had it corrode anything. Just let it cure out in the open and it's fine in my experience. YMMV though.

There are loads of different thermal fuses available from ebay sellers, I don't know if it's as cheap to ship from China to where the OP is but it's worth looking. This one for example looks just about perfect for the task.
https://www.ebay.com/itm/175104008550