small hole patch

[69projectKAOS]

i saw another member on here that had small holes in his floor and he used a liquid metal to patch them??? it was something like pd-15 or something! it was silver in color and he placed duct tape on the bottom of the hole and applied this to the top and it sealed the holes and made them solid! i have a few in my trunk that i wanna fix and i was wondering if anyone knew what the name was and where i can get it! or something like this that will work. thanks-dom