The glue is a classic cyanoacrylic, the problem is that it is full of air, and has three to four drops inside! The 3gr is a big lie. I bought 10 tubes and they are all like this. You will notice this if you just open it, hold it with the nozzle upwards and press it until the glue reaches the nozzle.
However, if you immediately go to glue and use 1-2 drops as usual, the next time you use it, you will think it dried up or evaporated and that's why it doesn't have any. That's why they are disappointing.

It is excessively fluid, resulting in it being suitable only for small surfaces with friction. On any smooth surface, it will slide and go to areas where it shouldn't. Different materials do not stick together.

It is very economical compared to other instant adhesives on the market, but I ended up throwing away all the ones I bought in the third damage I suffered because it is so fluid