Since we love to talk about glues

[xkaes]

Instead of doing a SEARCH, I decided to start a new thread. Besides every situation is different.

I've got a piece of Bakelite that has fallen apart -- into three pieces -- probably from someone putting too much stress on a locking bolt.

Anyway, I'm wondering if there is a glue that will put Humpty back together again?

 

[Kino]

Bakelite is a tough one. When I was trying to repair old radios, I never really found a good glue for that material that was strong and not incredibly ugly after drying.

Might want to drill and place some wire pins in the part (in addition to the glue) if it takes any stress at all.

Avoid foaming glues like Gorilla Glue!

 

[retina_restoration]

Instead of doing a SEARCH, I decided to start a new thread. Besides every situation is different.

I've got a piece of Bakelite that has fallen apart -- into three pieces -- probably from someone putting too much stress on a locking bolt.

Anyway, I'm wondering if there is a glue that will put Humpty back together again?

An epoxy resin is generally best for these kinds of plastics.

 

[4season]

I am a fan of the original, 2-part gray JB Weld. As a bonus, it can be shaped when it has set but not fully cured.

 

[Dan Daniel]

I think it was based on a recommendation here that I tried Milliput epoxy modeling putty. I needed to build out the corner of a Rolleiflex metal casting. The black worked well, and a little stippling with a Testors black modeling paint got me a nice match.

Milliput - The epoxy putty with a thousand uses in modelling, DIY and industry

Milliput is one of the world's leading producers of epoxy putties. It is adhesive to most materials, tough and durable, and self hardening.

www.milliput.com

But I did like Kino suggested- added some wire pins. Drilled a couple of holes into the main body, put music wire pegs in so that they would be fully covered after final shaping. I am a big believer in multiple securing methods if possible. Each will have a failure mode of some sort. I have also used drill holes to allow epoxy flow in to form 'pegs; to reinforce in a situation where other materials weren't possible. So if pins won't work, think abut making divots or such to give the adhesive more both grab area and structural support.

 

[ivan35mm]

yes, plastics with low surface energy (polypropylene, nylon, polyethylene, bakelite, etc) are notoriously difficult to bond.

you might have some luck with a special 2 component adhesives (check out Loctite 3035). this will require a dual applicator gun for cartridges.

i don’t recommend epoxy, unless you know how to properly surface prep, and even then, the bond still might fail…

if you wish to use epoxy, use West Systems G/Flex 655. but properly abrade/scuff the surface and degrease with appropriate solvent, so that the adhesives has something to help mechanically bond to the Bakelite

 

[blee1996]

I use JB Weld 2-part epoxy glue with steel enforcement, and have been successful with all kind of materials.

 

[F4U]

No mention was made as to what the object is or the area of it that is broken.