How to repair a cracked sink

How to repair a cracked sink

Jeremy, construction site supervisor, Cardiff

Guide written by:

Jeremy, construction site supervisor, Cardiff

128 guides

Whether you've dropped a heavy object or just want to breathe fresh life into a old wash basin, it's easy to repair a cracked sink. You simply need to apply a two-part epoxy resin, sand everything down and repaint the sink using an epoxy paint. Follow our guide to find out how to repair a cracked sink.

Important features

  • Preparing the sink for repairs
  • Sanding the sink and preparing the resin mix
  • Applying the epoxy resin and sanding
  • Applying an epoxy paint
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How to repair a cracked sink with minimal fuss

There are two situations in which you might find yourself having to repair a cracked sink:

  1. Firstly, you might have dropped a heavy object in the sink. A bottle of perfume can easily slip out your hands and crack a wash basin and dropping a Dutch oven will certainly leave its mark on your kitchen sink!
  2. Alternatively, you might just want to freshen up an old porcelain enamel sink; perhaps you've managed to nab a bargain sink from a second-hand shop but need to repair a crack before you install it.

Either way, we'll talk you through the process of using a two-part epoxy resin to repair a crack or chip in a porcelain enamel sink. These kits are made up of two pastes or gels (depending on the product) that are designed to be mixed together then applied onto the surface that needs repaired.

In order to hide the repair job (as your resin patch will be visible) you'll need to finish by repainting the whole wash basin or sink using a special type of paint.

Steps

  1. Preparing the sink for repairs
  2. Sanding the sink and preparing the resin mix
  3. Applying the epoxy resin and sanding
  4. Applying an epoxy paint

Required skills


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Repairing a crack in a sink is a fairly straightforward task. However, you will need to read all instructions carefully and pay attention to the mixing ratios. You will also have to dismantle the sink, sand and paint.

Time required


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2 to 4 hours

Number of people required


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1 person

Tools and equipment


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  • A plumber's tool kit
  • Adjustable spanner
  • A grease-cutting cleaner
  • Sponges
  • Water pump pliers
  • A set of screwdrivers
  • A set of spreading tools
  • Fine-grit sandpaper
  • An epoxy filler designed for porcelain sinks or baths
  • Cloths
  • An electronic scale
  • Tape and protective tarp
  • Epoxy paint kit for porcelain sinks or baths
  • Foam paint roller

Personal protective equipment (PPE)


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  • Overalls
  • Gloves (suitable for handling epoxy)
  • Respiratory protection
  • Safety goggles

Please note: this is a non-exhaustive list. Be sure to match your personal protective equipment to the job at hand.

1. Preparing the sink for repairs

Please note that if your sink is not yet installed, your task will be easier.

Dismantling the sink


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  • Remove the sink from its position.
  • If your sink is attached to parts such as a plug, waste, overflow grid or tap fittings, you will have to remove these too.
  • Using an adjustable spanner, screwdriver set and/or a pair of water pump pliers, carefully remove all sink components.

Cleaning the sink

  • The porcelain should be cleaned before any product is applied.
  • Wearing PPE, use suitable cleaning products and sponges to clean and degrease the sink. Once you've finished, clean everything again! Remember: this isn't your usual cleaning routine – it's an important step in the repairs process. You will therefore have to apply a bit more elbow grease.

2. Sanding the sink and preparing the epoxy mix

Sanding the sink

  • Sand the entire surface of the sink lightly using sandpaper.
  • Be sure to pay special attention to the area that requires repairs.
  • Finish by cleaning again to remove all dust from the surface of the sink.

Preparing the epoxy resin mix


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  • Using an electronic scale, a resin repairs kit and a spatula, mix product A with product B according to the ratio set out in the manufacturer's instructions.
  • Leave the product to rest for the specified time and prepare for application.

3. Applying the epoxy resin and sanding

Applying the resin

  • Using a spreader tool, apply the mix to the crack you want to repair as well as any other affected areas.
  • Leave the product to dry for the time set out in the instructions.

Sanding the resin

Once the resin is dry, put your PPE back on. It is essential to wear a respiratory mask as fine epoxy dust particles are very toxic. Next, sand down the hardened epoxy resin until you end up with a smooth surface.

4. Applying an epoxy paint

The epoxy won't be exactly the same colour as the sink enamel.

  • Using a foam paint roller, apply a special epoxy paint kit (designed for the material) to the entire surface of the sink according to the kit instructions.
  • Wait for the paint to dry.

Once the sink is repaired and looking new, all that's left to do is install it!

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Guide written by:

Jeremy, construction site supervisor, Cardiff, 128 guides

Jeremy, construction site supervisor, Cardiff

Electrician by trade, I first worked in industrial estates where I installed, wired and fixed a large number of electrical installations. After this, I managed a team of electricians for this type of work. 10 years or so ago, I turned to building and construction. From the modest family home, to gyms and theatres; I have been able to coordinate, audit and organise all sorts of construction sites. for 4 years now, I am restaoring and bulding an extrension to a bungalow in the heart of the welsh countyside. My experience in manual work and my knowledge means I am proud to be of service. Terraces, interior design, roofing, plumbing, electricty, anything goes! We have, my wife, daughter and I, built almost everything we have from scratch! So to answer all of your questions, and to orientate and advise you on coosing your tools? Easy!

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