Is it possible to use this kind of epoxy?



I'm unfamiliar with this, so I'm also attaching the directions it came with. The epoxy itself is in the case at the right side of the picture. It has the white substance at the center and the green substance around it. You mix it with your hands.

It is something that you mix with your hands and it is already somehow solid, so it should be easy not to go into the slots. However, I'm not sure whether it will stick or fit for that purpose.