How heat resistant is super glue

Superglue is only partially heat-resistant

Moisture, heat and air make superglue unstable

Cyanoacrylate is liquid at normal room temperatures and can be processed. When it escapes from the container and meets air, what is known as polymerisation begins. In a kind of chemical chain reaction, monomers are created, which consist of linked molecules.

When using superglue, a temporary air supply and after the formation of monomers, the end of the air supply is important. A permanent supply of oxygen can “fray” the protruding adhesive residues or wide joints. Permanent moisture also affects the superglue.

Maximum temperature resistance

These monomeric compounds can withstand heat or heat up to around 180 degrees Celsius. However, changes in the consistency can occur from around 150 degrees and reduce the stability of the adhesive connection. Using an activator does not increase the heat resistance either.

This heat resistance is only surpassed by special adhesives for high temperatures. Silicone adhesives and many epoxy adhesives can handle similar maximum temperatures. Epoxy metal putty can withstand up to around 250 degrees. Special furnace and fireclay adhesives made from quartz and sodium hydroxide (a so-called respirable fraction) withstand up to 1100 degrees.

Superglue can handle the average coolness of around four degrees in a refrigerator. In order to significantly increase its service life in the tube, it is recommended to store it there.

Possibilities of loosening adhesive bonds with heat

If the substrate can withstand heat, superglue can be removed from metal, for example, by heating. You can also work with heat if there is superglue in the lock. However, it must be ensured that there are no plastic components such as bolts in the lock cylinder.

Note the limited heat resistance of superglue when repairing dishes, cutlery and drinking vessels. Everything that you clean in the dishwasher and use in the microwave or oven should not be glued with cyanoacrylate. Toxic vapors can develop well before the maximum temperature is reached.

Author: Stephan Reporter
Article image: ontebeoteg / Shutterstock
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