[TechAssist] Re: JB weld. Its critical the Mix be 50-50 for a strong cure. J-B Weld is not designed for some types of plastic, but the company makes many other epoxies designed for specific situations involving many types of plastic. Messages 1,513 Location Peterborough. Good luck. For instance, a triangle with a 1, 2 or 4 in it indicates a form of polyethylene, while a 5 in a triangle indicates polypropylene. i called jb weld & asked their technical department would it work on a plastic radiator. I know my mother, in arts&crafts classes, would use TRI - or Trichloroethylene to melt, weld and form plastics. Alcohol should be avoided when cleaning surfaces, as it can degrade the bond. For many plastics , the original J-B Weld creates a strong bond that holds up over time provided that the item isn't required to flex or bend. Thats a good idea!, I've actually used JB on plastic, and it does work pretty well. JB weld is great for SMALL repairs. J-B Weld PlasticWeld comes in a syringe allowing for an easy 1:1 mix ratio. my mechanic told me to use marine tex epoxy & make certain it is prepped well with acetone and rough sandpaper. This particular article is all about KwikWeld, the fast-setting version of JB Weld epoxy. Allow it to dry overnight, preferably with a clamp or a Vise Holding the part together if Possible. Some plastic cements will work really well on Nylon but won’t bond to metal. Some glues like JB weld work great on metal, but not on Nylon. JB Weld has tons of products available for specific types of repairs, but the generic epoxies – JB Weld and JB Weld KwikWeld are the main types. But if you want a super-strong thin plastic repair, this works better than other products. J-B Weld is a two-part epoxy adhesive (or filler) that can withstand high-temperature environments. I'm thinking of a kind of "tinkers patch" two wide washers or pieces of metal, bolt through the middle, with JB weld sandwiched in the middle. Does JB Weld work on plastic? Some plastics are not compatible with different repair materials. This quick-setting epoxy cures clear when applied less than 15 mil thick. The Feature You Would Appreciate It’s important to know beforehand that the J-B Weld involves a two-step process in order to produce the final adhesive and make it effectively stick to the plastic, or whichever material your project calls for. How to Use JB Weld. In many cases, these plastics are identified by the recycling codes on them. Sep 6, 2009 #6 LOL, thats how I read it! The original JB Weld has a strength of 3,960 psi, which sets in 4-6 hours and fully cures in 15-24 hours. If it were me Id probably get a hold of some fiberglass cloth like used in autobody work or kevlar cloth both are easly to get at autobody supply shops or canoe shops and use it with the epoxy layering it like a plaster cast rapping the joints etc it would be hella strong :) 0. The J-B Weld 50139 Plastic Bonder Body Panel Adhesive and Gap Filler Syringe, however, definitely made the cut! Will JB Weld work with plastic? without any hesitation they said it would not hold & they advised against trying it. Has anyone successfully used JB Weld or something else on the plastic tank to stop the leak until that gets here and I'm able to change it out this weekend? [ View Follow Ups] [ Post Followup] [ Return to Forum] Posted by Popster (MD)` on November 10, 2002 at 20:46:51 from (66.82.9.46): I was going to use some MarineTex to repair a sonar transducer. I generally don't go much above 12psi or so. In fact, to get a good Nylon to Metal bond we need to use a few different products, one for each material and stick them together. Generally do n't go much above 12psi or so my mother, in arts & classes... The blade broke in the plastic pieces model giant robot kit together and i by break!, but not on Nylon but won ’ t bond to metal they... 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