JB Weld Plastic Bonder, PSA - I'm a fan Options

[DennisV]

I don't know about you, but I've had very limited success in repairing broken plastics. I've tried a lot of variations ranging from household super glue to 2-part speciality plastic products with activators. They rarely withstand any force applied. Yet I keep trying.

This week I happened upon J-B Weld Plastic Bonder. I used it on two different components of the fresh air blower. The black plastic tabs of the housing, which I think is phenolic resin. Also some areas where the fan blades attach to the cage, which I think is probably Nylon. I snapped a plastic spoon to have a pointed tip to apply it with. I actually found it a benefit that it gets tacky pretty quickly.

After 8 hours, both seem quite secure. I had first tried Loctite plastic bond and it failed with the slightest of pressure. We'll see how they do long term, and if the tabs will remain when I try to attach the clips.

[tygaboy]

(IMG:style_emoticons/default/agree.gif) I've had good luck with JB Weld products and also used it for an air box repair. It can be sanded to shape, painted, etc. Good stuff.

[Chris H.]

(IMG:style_emoticons/default/agree.gif) I was able to fill a hole in a plastic intake that had a sensor tapped in to it. Still holding fine 12 years later.

[friethmiller]

Yes, this is good stuff. I used JB weld, fiberglass, and a plastic weld gun to completely resurrect my OEM LE front valance (see posts: #581 and #611).

[Chad911sc]

I second the plastic welder….
The epoxy’s work very well on most non loaded pieces, but if done correctly with a plastic welder it can hold permanently. I’ve actually built entire pieces that were missing from body work on crashed sport bikes. All you need is metal tape to shape the part needed and fill it in. Sand it to shape afterwards.

[Artfrombama]

Wear gloves!
That stuff is great on plastic but will stain your skin for days.

[scrz914]

I just used the JB Weld 2 part epoxy putty for a shower pan repair. Waterproof and dries hard. So far no problems bearing weight.

[Justinp71]

Yea the plastic bonder is great. Also works to bond plastic parts to metal if needed!

I repaired a race car radiator with JB weld (kwik weld) it held for years!

Regular JB weld is commonly used to seal random steel to aluminum thread exteriors on the air cooled engines. Like on my six its used to seal off cam tower and case studs that would otherwise slowly drip.

Need like a full drawer of all the JB weld products ready to go for these cars (IMG:style_emoticons/default/smile.gif)...

[Ninja]

I've got EVERYONE beat with a J-B weld repair...

A friend of mine with zero money had a mid 90s FWD Toyota Celica with a severely blown head gasket.

It was MISSING a chunk of aluminum between two cylinders. His daughter had driven in in an overheated condition until it just would start anymore...

Used engines were too expensive and the junkyards would not sell heads off of them...

Using J-B weld super duty metal epoxy, a bead blaster, wax paper/glass pane/heavy weight and hand filling I built up the trough, "dremeled" it into submission and fixed that head.

I gave zero warranty, it lasted 9 months until it died its final death.

But, I replaced missing material between two combustion chambers with zero machining and it functioned for nearly 10,000 miles!

Done right it can work miracles...
(IMG:style_emoticons/default/ninja.gif)

[porschetub]

None better ,I got the first starter kit like 18 plus years ago when there was the first distributor in my country ,I sold the guy a porsche part to him and he sent me a starter kit for free .
I'am super fussy when prepping to repair, structural plastics done with the 2 parts being roughed with medium sandpaper to "key" the epoxy to the plastic parts you are joining,I always leave this product 24hrs to fully set .
I have repaired a lot of NLA parts and been real happy ,that's my take on it ,cheers