I tried to repair the frames of three different glasses (plastic and metal) and they didn't stick to the material, so the repair failed. However, the frame of the fourth pair holds up, but I don't think so. The product is easy to apply and hardens under the influence of an LED lamp. After hardening, it turns from a clear liquid to an opaque one. The welding material (plastic adhesive) has strong integrity, but it does not fuse (stick) to the base material like a typical welding process does. Any term "welder" must be removed from the product description. Put simply, it's just an epoxy that is activated by an LED. It may work with other apps but now I had to return it for a refund. I have no choice but to give a low rating.
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