So I've got a DIY project that involves multiple wires being soldiered to an LED strip. The trouble is the entire completed device will be subject to a lot of heavy play, and the wires will end up being moved rather frequently. So I'm looking for a way to 'solidify' the wires around the soldier joint, so that the closest point of flexing will be further from the joints. Electrical tape is nowhere near good enough, and due to the awkward size of the LED strip, shrink tubing won't work either. I assume what I need is the hard resin that I see applied to mass-produced devices sometimes, often around tall capacitors or transistors. I've been searching for an hour and I've seen many references to it, just stating that it's 'some kind of' epoxy or polyurethane, but I can't find an official product suited for the task. There's also "liquid electric tape" but the specs seem to suggest that this is only for waterproofing, not for mechanical reinforcement.