That sinking feeling when you spot damage in your porcelain sink—we’ve all been there. It’s frustrating, but before you call a plumber, take a breath. This guide will teach you how to repair a porcelain sink yourself, saving you money and hassle.
Why Do Porcelain Sinks Crack?
Before we cover how to repair a porcelain sink, let’s explore why it cracks. One reason is temperature stress from sudden shifts between boiling and ice-cold water.
Impact damage from heavy objects also plays a role. Even minor bumps can create hairline cracks over time. These can worsen with further temperature stress, especially from hot water. Damaged sinks can easily suffer from leaks and will eventually require professional replacement if not treated on time.
Assessing the Damage
Before starting your porcelain sink repair, assess the damage. Is it a minor surface scratch or a large divot?
Hairline cracks are fixable, while larger chips might require a full sink replacement.

How to Repair a Porcelain Sink: A Step-by-Step Guide
If the chip is manageable, you can repair it yourself. First, gather your supplies and clean the area. Epoxy won’t set right over dirt.
Gathering Your Supplies
Whether you shop online or at a local store, these are the essentials for porcelain sink repairs:
- All-purpose cleaner.
- Sponge.
- Towel.
- Fine-grit sandpaper.
- Porcelain filler.
- Two-part epoxy.
- Porcelain touch-up paint.
- Utility knife.
- Silicone adhesive/caulk.
- Caulking gun.
Having all of the right building materials will make repairing porcelain significantly easier.
Repairing Minor Chips and Scratches
Small imperfections might just need porcelain touch-up paint. Clean the damaged area before starting. When choosing paint, consider the brand of your fixtures. Some paints specialize in matching colors.
- Deep clean your sink, paying special attention to the damaged area.
- Lightly sand the edges of any nicks or cracks, wipe, and dry thoroughly. Remove any remaining dust with compressed air, if available.
- Mix a small amount of two-part epoxy, such as resin and hardener, and apply it following the product instructions. This is helpful for a DIY porcelain sink.
- After the epoxy cures, remove any excess with sandpaper.
- Cover the repair with matching porcelain touch-up paint.
- Let it dry completely for at least a day before using the sink.

Tackling Larger Chips and Cracks
Larger chips are more challenging but can still be repaired with epoxy. This can save you from a full sink replacement.
- Clean the porcelain around the damage with an all-purpose cleaner, ensuring any cleaning chemicals are fully removed.
- Dry the porcelain and protect any decorative finishes with masking tape.
- Lightly sand the edges of the divots. Using a porcelain sink repair kit could also be helpful.
- For holes larger than half an inch, consider backfilling with plumber’s putty or compacted tinfoil.
- Mix the two-part epoxy thoroughly. Apply it firmly into the damage, filling it completely.
- Remove any excess epoxy with a flat object like a popsicle stick. You can get this at your local store.
- Once the epoxy hardens, lightly sand for a seamless finish. Apply matching touch-up paint.
Sealing and Preventing Future Cracks
After patching up your sink, take steps to prevent future cracks. Replacing a porcelain sink is a hassle you’ll want to avoid. Remember your safety equipment when doing DIY projects.
- Inspect your sink annually for hairline cracks, and patch them promptly. These can worsen quickly with thermal stress.
- Handle your sink with care. Avoid dropping heavy objects and consider a sink protector. Limit the use of harsh chemicals.
Conclusion
Learning how to repair a porcelain sink is a rewarding DIY project. With the right preparation and a little effort, you can fix chips, dents, and cracks yourself. Use a repair kit if desired, but there are other ways of repairing porcelain as well. This guide helps you avoid costly replacements and keep your sink in good condition.
Contact us today for more information or to schedule a free consultation.