Ideal for sticking your hands, nothing else. Fortunately, it comes off with alcohol. I tried to mold it and stick a gasoline pump OUTSIDE, without coming into contact with the fuel. It didn't even stick to the metal

I had a water leak in the main body of the gas boiler. After installation and seven hours of waiting, the result was complete sealing. 100% effective.

It immediately seals leaks in the taps and valves of radiators, giving us time... maybe even indefinitely.
It saved us from certain expenses of initially changing the valves and possibly later the radiators.
When it dries, it becomes one with the metal and seals.
It remains to be seen how long this protection will last, so far it's excellent.