How to Repair a Porcelain Sink in 6 Simple Steps
Hint: Make sure you match the right color repair kit to your porcelain sink
- Blow dryer
- Porcelain sink repair kit
- Cloth
- Cleaning supplies
- Sandpaper
- Cotton swab
You're washing your hands and notice a little water has leaked onto your foot. Upon further inspection, you find a crack, chip, or hole in your porcelain sink. Sinks take a lot of wear and tear over the years, and water, caustic cleaning products, and other forms of corrosion can eventually lead to damage. Before deciding it’s a total loss, consider repairing your porcelain sink.
Learn how to repair a porcelain sink in this six-step guide—no praying to the porcelain gods necessary. Also, learn when damage may warrant a total sink replacement from a sink installer.
Prepping to Repair Your Porcelain Sink
You’re ready to fix your porcelain sink once and for all. The first thing you’ll need is a porcelain sink repair kit. These cost between $14 and $40 and come with everything you need, including a color-matched adhesive. Look for a kit specifically for porcelain, which you can use on various porcelain items, including sinks, tubs, toilets, and appliances.
Clean Your Porcelain Sink
Photo: Юля Шевцова / Adobe StockBefore you start, you must clean your entire sink. The reinforcing product from the repair kit will only work if the adhesive is in direct contact with the porcelain. So, whether it’s a pedestal sink or a vanity sink, you’ll need a large area around the repair site to be clean and dry.
Use a mild cleaning agent like dish soap and warm water. Cracks, holes, or dents can sometimes result from overexposure to caustic cleaning products. Before proceeding, use a dry cloth or a blow dryer to dry the entire sink.
Sand Down the Hole or Crack
Read the directions from your kit carefully. In most cases, the first step will be to sand down the rough edges surrounding the hole or crack. Your kit should come with a medium-grit emery cloth or a similarly graded piece of sandpaper.
Only sand around the damaged portions of the hole or crack. Then, use a cloth or a towel to wipe away any excess materials in the sink. You can also use a blow dryer to blow it away, too.
Mix Your Adhesive Compound
Most repair kits come with two jars that you mix together to activate the sealing compounds. Again, read the instructions carefully and follow the directions. Wear gloves for this portion, as most adhesives shouldn't make direct skin contact.
Apply Adhesive to the Porcelain Sink Crack or Hole
Gently apply your mixed adhesive compound to the porcelain crack or hole in your sink with the provided wooden stick or syringe. Some kits also come with tiny razors that you can use to apply the repair material to hairline cracks. Use the same tiny razor to smooth out the edges after you've applied the adhesive. Make sure there are no clumps anywhere along the crack.
If You Over Apply the Adhesive, Use Cotton
Sometimes accidents happen. If the adhesive gets messy, grab a cotton swab and dip it in nail polish remover. Wipe away any extra adhesive or spills.
Let It Dry
Some products—especially more expensive porcelain sink repair kits—dry in minutes. Others can take as long as 24 hours to firm up. Follow the instructions on your package before running hot or cold water in your porcelain sink.
DIY Porcelain Sink Repair vs. Hiring a Pro
You can fix most minor cracks, chips, holes, and even dents. To fix larger sections of damage, you may need to take additional steps, like drilling directly into porcelain. If the sink is structurally compromised, you may decide your best option is to install a new bathroom sink.
However, if you make an error, these tasks can be time-consuming and costly, so proceed carefully. If these tasks feel out of your wheelhouse, consider contacting a local sink reglazing professional who can get your sink looking shiny and new.
Sink installation cost varies, but the average cost falls between $225 and $650, depending on the size, materials, and labor. If bathroom remodel costs for a full makeover aren’t in your budget right now, repairing your porcelain sink or installing a new one can give your bathroom a fresh feel.
Lauren Bongard and Ben Kissam contributed to this piece.
Frequently Asked Questions
Hairline cracks—tiny cracks in the surface—in porcelain sinks can happen due to age, chemical damage from cleaning products, dropping heavy objects on the sink, thermal shock from drastic temperature changes, stress during repairs, and manufacturing errors. Hairline cracks often start very small and grow longer and wider over time. While they may appear problematic, hairline cracks don’t indicate structural problems and may not impact the performance of sinks. However, they can eventually cause water leaks and mold growth if left to grow.
It is possible to resurface porcelain sinks—in fact, it’s a smart thing to do for aesthetic and functional reasons. If your porcelain sink has scratches, chips, or dings, resurfacing or recoating it can make it look new and prevent further damage. Depending on your budget, the sink's value, the extent of the damage, and your DIY abilities, you can resurface the sink yourself or hire someone to do it. You can buy DIY porcelain sink resurfacing products at home improvement stores, and sink resurfacing contractors offer reglazing and recoating for sinks, bathtubs, and other porcelain surfaces.
Porcelain and enamel sinks have very similar appearances, but they aren’t the same. Porcelain is a ceramic made from natural clay, while enamel is a strong powder that’s glazed over a metal sink. Use a magnet to determine whether you have an enamel or porcelain sink. If a strong magnet sticks to the sink, it’s likely enamel. If it doesn’t, you probably have a porcelain sink. You can also use the model number on the sink (often found on the underside of the bowl) or information from the manufacturer to determine the material.
