To remove super glue from a padlock, the most effective method, especially for dried super glue, is to use acetone.
Super glue (cyanoacrylate) is a common adhesive often used maliciously on padlocks by vandals because it's cheap and hardens very quickly. However, its chemical structure makes it susceptible to dissolution by certain solvents.
Using Acetone (Nail Polish Remover)
According to sources, super glue should be dissolved relatively easily by acetone, which is commonly found in nail polish remover.
Here’s how you can typically approach this:
- Gather Materials: You will need acetone (ensure it's high-purity acetone, not acetone-free remover), cotton swabs, a small brush (like a toothbrush or wire brush), and possibly a small container.
- Safety First: Work in a well-ventilated area. Acetone is flammable and its fumes can be strong. You may want to wear gloves to protect your skin.
- Apply Acetone:
- For dried super glue on the surface of the padlock, carefully apply acetone using a cotton swab. Dab it directly onto the affected areas. Avoid letting it drip into the internal mechanism if possible, as acetone can potentially damage other materials or lubricants inside the lock.
- If the super glue is blocking the keyhole or shackle mechanism, you might need to carefully apply a small amount directly into the affected opening. Using a dropper or the tip of a cotton swab can help control the application.
- Allow Time: The reference states that dissolving super glue with acetone "will take a while." Be patient. Let the acetone sit on the glue for several minutes to allow it to penetrate and soften the adhesive. You may need to reapply acetone as it evaporates.
- Work the Glue: As the glue softens, gently try to pick or brush it away. A small wire brush or even a sturdy pin can help, especially in tight spots like the keyhole or around the shackle. Avoid forcing anything that could damage the lock components.
- Repeat: Continue applying acetone and gently working at the glue until it is dissolved or removed. This process may require multiple applications and patience.
- Clean and Lubricate: Once the glue is removed, clean any residue with a cloth. It's recommended to use a suitable lubricant (like graphite lubricant or a lock lubricant) on the lock mechanism afterwards, especially if acetone got inside, to ensure smooth operation.
Important Considerations:
- Patience: Dissolving super glue with acetone is not instantaneous. It requires time for the solvent to break down the bond.
- Accuracy: Be precise with your application, especially near sensitive parts of the lock.
- Alternative Tools: For hardened glue inside mechanisms, specialized tools like lock picks might be used carefully by someone experienced, in conjunction with the solvent, to try and break up the softened glue.
Using acetone is a recognized method based on its chemical properties and its ability to dissolve cyanoacrylate adhesive, making it a primary solution for tackling super glue on surfaces like a padlock.
