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Bonding hard to bond plastics

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Some plastics like this fridge shelf part refuse to bond whatever the glue you use. Super glue would not stick to it and epoxy resins could peel out. Here's the solution.

DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.

The glue to use for hard to bond plastics

The trick is in the tube shown to the left: a chemical activator available for sale within glue kits for hard plastics made of the activator tube and a super glue tube.

The activator lasts longer and can be used with super glue of different brands like the case pictured here:

Pass 1: the plastics bonding activator pen

Apply a first pass with the activator on both ends and wait for 5 minutes

Pass 2: the super glue of any brand, any type (liquid or gel)

After waiting for 5 minutes, apply one drop of super glue to one side of the broken part.
Do not use excess glue, 2 drops per each 3 cm are enough.
Do not breathe the super glue vapor, it irritates eyes.
Avoid having glue on your hands, see further below on what to do if super glue reaches your fingers.
Remove excess glue with a tissue.
Work piece by piece, area by area, do not put drops of super glue on all the parts to bond at a time. Start a new area after you finish the previous one.
​Now press firmly the parts to bond together for a few seconds.
It is not important to press longer, rather to press stronger:
Wait at least 2 hours before reassembling the repaired part and applying any load to it.

What to do if some super glue sticks to your fingers

Put your fingers immediately under the hottest water you can afford.
This will eliminate most of the glue and soften the remaining part.
​Super glue will completely vanish from your fingers on the next day upon repeated hand washing.

Buy your plastics and rubber glue here, make sure of their use: