Weld On makes many plastic adhesives and glues and you can buy them from Tap Plastics (go there if you have one in your area). Or you can go buy through their website. Their products are a form of solvent that is thinner than water, and does not "glue" things together. Rather they flow via capillary action into the cracks and temporarily "melts" the plastic chemically, and when the solvent evaporates, you will be left with the product literally fused back together. There are no fillers so it has to be a clean snap like that. If you have gaps, you'll have to use an epoxy type of adhesive which will look like putty slathered on top. Almost all classic boomboxes use plastics that will work with these adhesives, even though they might say for PVC, ABS, Vinyl, etc. To be sure, you can try a tiny drop in an obscure location of the boombox, maybe interior. If it affects it and turns it gooey, it will work. If the drop stays on top like a rain drop, and the plastic does nothing, it is incompatible with that type of plastic. DO NOT use cyanoacrylate or any type of superglue if you want to use the solvent type of adhesive. superglue will contaminate the surface and won't allow the solvent to do it's job unless you scrape it off, but then you'll be missing chunks or bits that will result in a less than ideal bond. One caveat... it's not good to use on the front cabinet shells where the break traverses chrome, or lettering. It is a solvent and as it's so thin, it is hard to control, and it WILL remove lettering, distort clear acrylic, and damage decals, and applied chrome (not true metal chrome but the kind that is like paint. In fact, the surface tension is totally lacking on this product so you literally can't deposit a drop if you want. A hyperdermic needle inverted won't drip, it will shooot out in a narrow stream with no pressure.
