Jb Weld

[Caddo]

Hi all

 

I've seen many posts where mostly scratch builders [i'm not]talk of JB Weld. JB Weld make urethane & epoxy adhesives, with a large range of product lines.

 

Which JB Weld product is most commonly used for gluing metal bushes & bracing of motors to 1/32 plastic chassis?

 

Cheers

 

Caddo

Edited May 28, 2017 by Caddo

[munter]

I dont use it for gluing bracing. I prefer an araldite two part type epoxy glue for that sort of thing.

JB can peel away from a smooth surface such as a chassis...or maybe it is the flex in the chassis plastic as the JB goes pretty hard.

[kalbfellp]

I have used JB weld Epoxy with very good results. It is harder than Aradite. But both are best when applied to a roughened up clean surface.

 

[SlotsNZ]

I only know of 2 JB Weld products, both consist of a grey hardener, and a black adhesive part.... or is it the other colour way around... been a while since I had access to my bench. Both set completely rigid, whereas all other 2 parts I now set "rigid" or "firm" but have some give, and soften with heat - eg motor heat.

 

The standard, and the one known as JB Quik - which has a - obviously - quick set time instead of 24 hours in the standard product.

 

I used both, The quik for non-stress situations, and the slow set for anything that has to survive knocks.

 

The advantage on one side of the ledger is that because it sets like concrete it has a fixed rigid shape, and doesn't flex like most 2 part epoxys. In my experience that makes for smoother drive trains where you want to prevent flexing in say a scalex chassis where you are gluing in upgrade parts, bracing the motor to the drive side - where I usually use some brass rod or piano wire encased in glue.

 

The downside is as munter was saying, is because it has no flex, it has a bit higher likelyhood of cracking off of the surface it is bonded to than a flexy 2 part.

 

And like Phil says, a key to reducing that risk is mainly to make sure the surfaces you glue to are clean - especially de-greased. But roughing up a motor surface, increasing contact area, and even part wrapping the brass around the thing you are gluing it to - all help.

 

Overall, it is still my first go-to product for gluing things together.

[munter]

I sometimes use JB for filling a body master but never for gluing. I use some cheap two part epoxy from the dollar store for gluing bracing, axle tubes, body posts etc. The latest purchase actually sets to a milky white just like the stuff of old. The tubes are nearly empty and I have some Uhu two part that I got from an art supply store sale. We shall see how good that is.

[slotmadmac]

I have used it to brace rear bushes for years. Never had an issue.

[Yngwie]

Caddo

 

https://www.jaycar.com.au/j-b-weld-epoxy/p/NA1518

 

Regards

[David Carter]

i always use JB weld for bracing and never had a problem

i always give it a little bit of a roughing up and good clean

roughing up the contact points gives the glue a better bite/hold to the surface

[Caddo]

Thanks guys

 

As per John's link above, is this the version of JB Weld all are using?

 

https://www.jaycar.c...-epoxy/p/NA1518

 

If not, please post a pic or link of your own type, thanks

[SlotsNZ]

That's the one I was using.