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Superglue on its own is not strong enough for this job. The tricks is to sprinkle some baking soda to form an instant cement.

Superglue (Cyanoacrylates, CA) + Baking Soda (Accelerators) = Super-hard instant cement (Exothermic reaction)

Step 1: Baking Soda + Superglue

When baking soda(accelerator) is added, superglue will set almost instantly (5 seconds).

Step 2: Add Few Layers for Stronger Bond

Add superglue to the surface and sprinkle with some baking soda. It will set almost instantly, about 5 seconds. Repeat the steps few more time for stronger bond. Do it on all sides of the broken area.

Step 3: Fixed

The broken part is as strong as original. The surface doesn't shrink, can be sand and paint.

<p>Do you know if this is waterproof ? I used it on an aquarium pump and submerged it after 15 minutes of cure time. It was running under cold water for about 10 hours. After removing it , everything appeared as strong as ever.</p><p>I know it survived 10 hours but what about a month or year ? Does anyone know ?</p>
<p>This is genious! Everybody should know this..</p>
<p>Voila, not viola (raped in french)</p>
<p>Thanks </p>
<p>Baking soda = Sodium Bicarbonate</p>
<p>Nice trick!</p>

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