If you work on cars, especially repair or restoration of cars built after the use of plastic became widespread, you probably have had to repair a plastic part. There are several ways to do this. One, of course, is with glue or adhesive, such as epoxy or "superglue". Another way is with one of the plastic welding systems on the market, however, the tools which work well are somewhat expensive, in $75-$250 range. A third way to repair a plastic part is with a "Bondic Liquid Plastic Welder".
Glue is an adhesive that allows broken parts which fit together perfectly to stick together and become one, however, glue cannot replace missing substrate. Most glues cure when exposed to air and usually require pressure between the two parts for a successful bond. The active ingredient of the Bondic process is a “pre-plastic” liquid. When this "Bondic Solution" is exposed to ultraviolet light, its molecules bind and the solution hardens into a plastic. Bondic solution has adhesive properties, but it is essentially plastic in a liquid format so you don't need perfectly fitting parts for it to work. With Bondic, you can fabricate missing substrate. Additionally, pressure between the parts is not necessary for a Bondic repair to work.
Once cured with UV light, Bondic is clear, water proof, heat resistant and, given proper surface preparation, creates a permanent bond. You can fix, fill, bond or build-up a wide variety of substances with Bondic. The process works on: plastic, wood, metal, rubber, ceramic, vinyl, Kevlar, carbon fiber, polypropylene, leather and many other substances. Just remember: Bondic is not a bonding agent in the sense which we have all come to expect from adhesives; it’s more like a portable, free-hand 3D printer.
We used a Bondic "Starter Kit" to repair a broken mounting ear on a plastic headlight assembly, to fix cracks in a plastic air filter lid, plug a hole in a windshield washer bottle along with fixing a couple of non-autmotive, household items. Provided, the Bondic process is done according to the company's instructions, the repairs to items like that, in our experience, work quite well.
Bondic welding cannot replace all glues and adhesives because it has limitations. First, it can't be used to "butt weld" anything because, if Bondic solution cannot be exposed to UV light, it cannot be cured. Secondly, if the repair is to be permanent, the surfaces of the area to be welded need to be rough. This will require abrading the area with sandpaper, Standard Abrasives coarse BriteRite hand pads, an emery board or a file. Third, do not use Bondic in direct sunlight. The UV component in sunlight will cure the Bondic solution prematurely. Fourth, while Bondic can be used to replace missing substrate of an item being repaired, when using it to create new material, welding must be in layers no more than .020-.030-in. thick. In other words, don't lay on a big glob of Bondic solution at one time. Build up the area with successive fluid applications followed by curing with Bondic's UV LED. Keep those limitations in mind and Bondic will become a valuable part of your array of repair tools.
The Bondic Starter Kit comes with everything you need for most plastic welding tasks. The battery in the UV LED can be replaced with the light gets dim. A larger, "Bondic Jumbo" is also available with twice the solution capacity.
For more information, Bondic has web sites at www.notaglue.com and at www.bondicusa.com
Between the two, you can find a heck of a lot of information and uses for a Bondic Starter Kit.