Baking soda or other powders mixed with super glue to make small parts

[ebinmaine 67,286]

To be honest I kind of skipped through this. It looks very interesting for making small parts. Wondered if anybody else has heard of this or tried it...

 

 

 

[WHNJ701 4,165]

I build alot of scale airplane models, there's lots of tricks with ca glue, the baking soda works, use it for filling gaps.  If you add a drop of water it will accelerate it.  

[953 nut 55,091]

Cyanoacrylate Adhesive mixed with saw dust  is a great wood filler. Shelf life after it is opened is a problem, like @jabelman said, it likes water and container will harden in a day or two in humid conditions. I buy a package of smaller 1 oz containers.

[tom2p 2,394]

I also was into model kit building at one time - and not too long ago slot car racing 

 

used CA glue often - epoxy also 

 

when repairing and restoring vintage plastic bodies - sometimes created colored 'body putty' with a mix of CA glue and plastic 'dust' or shavings created when sanding a plastic body 

 

also would soak small plastic pieces in Testors liquid glue (cement) to make body putty ... must be the old school Testor's liquid glue (with toluene or MEK ?) ... plastic parts will soften or 'melt when soaked in that stuff 

 

Edited October 24, 2020 by tom2p

[Lee1977 6,647]

I have fixed interior plastic car panel that cracked with it and fiberglass cloth on the back side. Paper tape the front to hold it in place works great. Don't know how many tubes of JB weld I have used. 

[DennisThornton 4,769]

There's a kit with CA and superfine silica (sand) and it works great!  I guess using baking soda is the same but I'd think the silica would create a harder joint.  That could be a downside if it needs to be shaped after drying.  I haven't tried other powders but I'm guessing any including metallic powders would work.  I was intrigued by the alum casting!  I've not noticed any heat reactions though my repairs have only been with the silica and were so small that I wouldn't have noticed any heat.