Super Glue and Bicarbonate of Soda: The Simple Repair Trick

A chair leg splitting just before guests arrive, a drawer handle coming away in your hand, or a small plastic item that seems ready for the bin: everyone knows how a tiny breakage can spoil an entire day. In my grandfather’s workshop, an old box of bicarbonate of soda always sat beside a tube of glue. At first glance, there was nothing remarkable about it. Yet this modest pairing is now reappearing in garages, DIY forums and on the kitchen worktops of busy households. It is no substitute for a new part or a skilled craftsperson, but it can rescue plenty of small items. The result is often unexpectedly effective.

The overlooked combination that gives objects a second life

The idea relies on an almost ordinary pairing: cyanoacrylate glue, widely known as “super glue”, and bicarbonate of soda. When brought together, the powder speeds up the glue’s setting process and forms a hard material that can fill a crack or rebuild a small missing section. It begins as a white dust, then turns into a solid, resin-like substance within seconds. The process can seem almost too straightforward to work. That simplicity explains why it has become popular again: you do not need a large workbench or expensive equipment to save an everyday item.

A neighbour recently told me how he repaired the broken bracket for his driveway gate remote using this approach. The thin black plastic part had split around the screw hole, the sort of damage that makes an item unusable even though everything else still works. He brought the edges together, added a drop of glue and sprinkled over a pinch of bicarbonate of soda. After applying several very thin layers, he sanded away the excess. More than a year later, the repair is still holding up despite daily handling. A replacement part would have cost nearly £30, excluding delivery.

There is nothing magical about the reaction, however much it may look that way. Bicarbonate of soda acts as a filler and speeds up the hardening of the glue, which works its way into the surface’s tiny irregularities. The repaired area then becomes very rigid, at times more rigid than the neighbouring plastic. It is useful for small brackets, chipped corners, worn screw threads and decorative objects. To be honest, nobody really does this every day. But when a casing tab breaks or a toy loses a small peg, this trick may prevent a needless purchase.

Using super glue and bicarbonate of soda: thin layers and patience

For the neatest result, prepare the surface before opening the tube. Clean and dry the item, remove any crumbly material, then place the parts to be joined in position. Apply a very small amount of glue to the crack or recess, then add a light dusting of bicarbonate of soda. Wait a few seconds, tap away the surplus and repeat if the gap is deep. Building up the repair in thin layers is preferable to creating a large lump that will be difficult to sand down. A fine file or fine-grit abrasive paper can then restore a cleaner shape.

The most common mistake is trying to work too quickly by using a large drop of glue and a whole spoonful of powder. The mixture heats up, can sometimes give off an unpleasant smell, and may become gritty or brittle. It is better to work near an open window, protect the work surface and keep your face well away. Do not use this method on an item intended for food contact, a toy that a child puts in their mouth, damaged electrical cable or a part involved in vehicle safety. A home repair has limits, and recognising them prevents a great deal of trouble.

For items subject to only slight stress, my grandfather’s rule remains surprisingly relevant: do not try to save everything; reinforce what can genuinely be reinforced. Precision matters more than quantity. Wear safety glasses and avoid cotton gloves, as cyanoacrylate glue can react with the fibres and become very hot.

“A successful repair does not always show: it simply makes the object useful again.”

• Clean and thoroughly dry the cracked area.
• Use a small pinch of bicarbonate of soda, never a large heap.
• Apply the glue in fine layers and allow it to harden between each application.
• Sand gently once the material is fully hardened.
• Keep this method for non-critical parts that do not need to flex much.

Repairing small things changes how we view what we own

There is something reassuring about this modest repair: it slows the impulse to throw something away as soon as it shows a weakness. A box, handle, frame, appliance foot or the corner of a toy can sometimes return to use with ten minutes of care. It is not solely about saving money, although that matters when expenses build up. It is also a way of regaining some control over ordinary possessions. Repairing is not cut-price DIY: it means deciding that an object deserves another chance.

Glue and bicarbonate of soda will never replace welding, suitable fixings or the work of a professional. Some materials remain too flexible, some breaks are too extensive, and items exposed to heat or heavy loads require another solution. Still, this method recalls something people once understood well: before replacing an item, it can be worth taking a closer look. Where is the weak point? Can the part be reinforced? Simply attempting a repair, even an imperfect one, already reflects a different relationship with the home and everything in it.

Perhaps you have an item at home that everyone has avoided for weeks: a wobbly coat hook, a cracked battery cover or a small furniture fitting put aside “for later”. Taking it out of the cupboard and viewing it differently can sometimes be the start of a very simple repair. The next time a plastic part appears beyond saving, that forgotten white powder at the back of the cupboard may change what happens next. The best tips are often the ones shared over a coffee, without much fuss.

Key point	Detail	Benefit for the reader
The glue-and-bicarbonate pairing	Bicarbonate of soda speeds up cyanoacrylate glue setting and helps fill small gaps.	Quickly repair minor cracks or broken pegs.
The thin-layer technique	A small amount of glue followed by a light coating of powder produces a neater, stronger finish.	Reduces excess thickness, heat and sanding.
Limits to observe	Do not use it for food, electrical, medical or safety-related applications.	Use this method without taking unnecessary risks.