Super strong glue for plastics

[Veloo]

Anyone know of a glue that makes plastic as good (or better than) as new?

Frame pump mount cracked.

Handy for other things too, of course.

[rnhood]

The maker should just send you a replacement. No big deal. But I'd be looking at another pump if it were me. If it broke once then it'll probably break again.

[Black Dog]

JB- Weld plastic epoxy. There is nothing stronger. BTW, I have tried every type of glue, nothing comes close.



Here is a test of various plastic glues and epoxies.

https://www.google.ca/url?sa=i&url=h...AAAAAdAAAAABAN

[Veloo]

Where have you found this BD?
Crappy Tire has red and black but not yellow.

[Bentley]

Amazon has it. Appears the color is tan, not yellow

Ray

[Black Dog]

Originally Posted by Veloo

Where have you found this BD?
Crappy Tire has red and black but not yellow.

The red and black is more or less the same. Different cure time is the difference. I use the Red and Black. It sets in 15 minutes and is easier to work with since it has more open time.

[wallymann]

Originally Posted by Veloo

Anyone know of a glue that makes plastic as good (or better than) as new?

i dont think such a thing exists, especially if you have limited surface-area available to bond.

if you have a larger area to bond area and aesthetics dont matter too much -- adhesives can work because and can work even better if you can reinforce the joined bond with something mechanical like rivets or screws.

[Veloo]

Thanks.
Does a tube have much shelf life or does it tend to dry up like Krazy Glue after the one application?

Originally Posted by Black Dog

The red and black is more or less the same. Different cure time is the difference. I use the Red and Black. It sets in 15 minutes and is easier to work with since it has more open time.

[p nut]

My pump mount cracked earlier this year. I just used super glue and sprinkled baking soda on top of it. Instant bond and is holding so far.

[weisan]

You would be surprised a lot of these frame pump mounts are interchangeable. I got a bunch of them from the co-op, they all work the same way, you pop the pump into the holder and it's really just the velcro strap that is holding it tight so it doesn't fall off.

[alancw3]

Originally Posted by Black Dog

JB- Weld plastic epoxy. There is nothing stronger. BTW, I have tried every type of glue, nothing comes close.



Here is a test of various plastic glues and epoxies.

https://www.google.ca/url?sa=i&url=h...AAAAAdAAAAABAN

I would agree. jb weld is the best and like the poster I have tried them all. nothing comes close to jb weld. personally I like the 5 minute set time one.

[Tony]

Methylmethacrylate is what you what in a two part glue. It bonds certain types of plastic on a molecular level. Not all plastics can be glued, some need to be welded.

[JAGI410]

Originally Posted by Veloo

Thanks.
Does a tube have much shelf life or does it tend to dry up like Krazy Glue after the one application?

I just finished the 2 year old tube I had in my garage. As long as put the cap back on quickly, it'll be fine for a while.

[duff_duffy]

Just an FYI, some Epoxy’s may change color over time. Used the JB epoxy on tub a while back, looked great at first but turned yellower over time where the epoxy was still visible. Just an FYI if some leaks out or is used as a bit of filler (my crack did not come completely together some of this filled in gap).

[benb]

That JB Weld is $8

It might be more expensive than a new mount for the pump from the manufacturer.

Only thing with Epoxy is the long set time means you better have a clamping solution for the part, which might be tricky with a little pump mount if you're not in the habit of doing stuff like this.