5 Second Fix bills itself as a liquid plastic welding compound that allows you to create an everlasting bond with just a flash of the UV light. They state 5 Second Fix is not a glue but will fix, repair, and seal virtually anything including metal, wood, glass, and more.

5 Second Fix is a liquid resin, not a glue, that stays in liquid form until it is cured with a UV light of a specific wavelength. This type of technology has been in use since the 1960s in industrial coatings because of its consistency and reduced environmental impact; a version of UV welding is used by dentists to fix teeth and is popular in 3D printing. While epoxies or glues are certainly good for certain things, the main benefits of a liquid “weld” resin in this type of application is that it has no fumes, no sticky residue, works on wet or dry surfaces, and almost instantly hardens but only when exposed to a specific light wavelength. The resulting weld/bond can be as tough or tougher than a glue.