[vcf-midatlantic] This is the coolest thing. Fixing broken/missing plastic with baking soda and super glue.

Herb Johnson hjohnson at retrotechnology.info
Tue Sep 24 15:03:05 EDT 2019

The video referenced, is a bit long and repetitive. Here's the short 

Materials needed: Baking soda and presumably generic superglue 
(cyanoacrylate) and some aluminum foil taped to a surface. Of course, a 
broken plastic part. You'll need some very small files.

The goal is to build up material on the broken part, to shape by filing 
with a file, into the desired shape for repair. The "desired shape" may 
be determined by comparison with an unbroken part. The aluminum foil, is 
a convenient non-absorbant and disposable surface. The baking soda 
provides some bulk for the glue and may help accelerate the glue to dry.


You have a part with a broken tip or point or area.
Plan in some fashion, the shape and size of the new repair.
Get some superglue and a teaspoon's worth of baking soda.
use aluminum foil as a working surface

tape the aluminum foil to your workspace table.
dump some baking soda on the foil.
dump ELSEWHERE on the foil, a glob of superglue
repeat the following quickly (less than a second)

dip the broken surface lightly into the superglue blob.
dip the wetted surface lightly into the pile of baking soda.

repeat that many times, to form a blob of hardened superglue/powder.
Try to make the shape of the glob "like" the size of your part.

It will harden quickly but give it some time to harden.
You may have to repeat the process to shape the built-up part.

Look at your "plans", and use the files to shape the built
up repair to the desired shape. Don't use cutting tools (snips,
saws) because they will bust it.

Try to fit or assemble your repaired part. Make adjustments as needed,
to either add more powder/glue or file it away.


The Mythbusters - who repair a LOT - cover this and other means of glue 
plus filler plus accelerants. They actually know WHY things work or 
don't, and tell you.

Herb Johnson

Herbert R. Johnson, New Jersey in the USA
http://www.retrotechnology.com OR .net
preserve, recover, restore 1970's computing
email: hjohnson AT retrotechnology DOT com
or try later herbjohnson AT retrotechnology DOT info

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