Intended to be used for welding, but there are some problems with welding. welded. You should also sand or file this epoxy on the underside to allow electrical contact to be made with your table. After that, it turns out that the aluminum alloy arcs and burns at the contact area with my table. I'm not sure if this black residue is from the remains of the epoxy coating or from the case itself. I will update the review after burning it for a while.