Quck answer
To fix pin-sized holes in a stainless steel sink, follow these steps:
1. Clean the area around the hole with a mild detergent and water.
2. Dry the area thoroughly with a clean cloth.
3. Apply a small amount of stainless steel epoxy or filler to the hole, using a putty knife or a similar tool.
4. Smooth the epoxy or filler with the putty knife, ensuring it is level with the surface of the sink.
5. Allow the epoxy or filler to dry completely, following the manufacturer’s instructions.
6. Once dry, lightly sand the repaired area with fine-grit sandpaper to blend it with the rest of the sink.
7. Clean the sink again to remove any dust or residue from the repair.
Remember to always read and follow the instructions provided with the epoxy or filler for the best results.
There is no way to completely remove pinholes in a stainless steel sink, which is why replacing the sink may be the best option. Additionally, the corrosion that caused the holes may still be ongoing, and the holes could get bigger over time. However, if you want to save the sink, you can try patching the holes with two-part epoxy, as suggested by multiple posts on Contractor Talk.
Causes of Sink Holes
Despite its name, stainless steel is not completely resistant to chemical stains, especially those caused by chlorine and chlorides. When these chemicals come into contact with the surface layer of stainless steel and there is enough oxygen present, a reaction occurs that corrodes the surface and creates pinholes.
One common source of chlorides in a sink is salty water. If you frequently pour cooking water down the drain without rinsing it properly, the standing water can lead to pinholes. Cleaners containing chlorine bleach are even more aggressive and can cause the same type of pinhole corrosion if not rinsed off.
Repairing with Epoxy
There are limited options for repairing a hole in a sink. Welding is possible but not practical, while patching with epoxy is both possible and practical. However, it’s important to note that the repair will not make the holes disappear completely, so the corrosion will still be visible as long as you have the sink.
One commonly mentioned repair product for pinhole damage is J-B Weld, a two-part epoxy putty that is usually gray or white and comes in water-resistant formulations. If you prefer a clear adhesive, you can consider using a clear epoxy like Loctite or Gorilla Glue.
If the pitting has not gone through the metal, it is recommended to use a water-resistant product as you will need to apply it to the side of the sink that holds water. If the pinholes have gone through the metal, you can do the patching from underneath the sink where the epoxy will not be visible.
Applying the Epoxy
Epoxy adhesive is a liquid, although it has a high viscosity, and you can easily fill the pinhole depressions with a putty knife right after mixing it. You can also do this with epoxy putty, although it is thicker and more difficult to spread. After filling the holes, clean off any excess glue or putty with a rag and acetone to make the repair look as good as possible.
If the holes have gone through the metal, you can easily locate them by going underneath the sink and looking for light shining through. Apply epoxy putty to each hole by spreading it generously on the underside of the sink with a putty knife. Wait for the recommended cure time stated on the epoxy label before testing the sink.
