How to Fix a Crack in a Plastic Bathtub: A Comprehensive Guide

April 27, 2023

Plastic bathtubs are a popular choice for many homeowners. They are affordable, easy to clean, and come in a variety of colors and styles. However, plastic bathtubs can also be prone to cracking. Cracks in a plastic bathtub can be unsightly and can also lead to leaks, which can cause damage to your home. If you have a crack in your plastic bathtub, it’s important to fix it as soon as possible to prevent any further damage. In this article, we will provide a comprehensive guide on how to fix a crack in a plastic bathtub.

What causes cracks in plastic bathtubs?

Before we dive into how to fix a crack in a plastic bathtub, let’s first explore what causes these cracks. Here are some common causes of cracks in plastic bathtubs:

  • Age: As a plastic bathtub ages, it can become brittle and prone to cracking.
  • Improper installation: If a plastic bathtub is not installed properly, it can lead to stress fractures and cracks.
  • Heavy impact: If a heavy object is dropped on a plastic bathtub, it can cause a crack.
  • Extreme temperature changes: Rapid changes in temperature can cause a plastic bathtub to warp and crack.

How to Fix a Crack in a Plastic Bathtub

Now that we know what causes cracks in plastic bathtubs, let’s explore how to fix them. Here are the steps you’ll need to take to fix a crack in a plastic bathtub:

Step 1: Clean the affected area

Before you can fix the crack, you’ll need to clean the affected area. Use a mild detergent and warm water to clean the area thoroughly. Once the area is clean, use a towel or cloth to dry it completely.

Step 2: Sand the crack

Next, use sandpaper to sand the crack. Sanding the crack will help the repair material adhere to the bathtub. Use a fine-grit sandpaper and sand the edges of the crack to create a rough surface.

Step 3: Apply the repair material

Once the area is clean and sanded, it’s time to apply the repair material. There are a variety of repair materials available, but for plastic bathtubs, an epoxy resin is often the best choice. Follow the instructions on the packaging of the epoxy resin to mix it properly.

Using a putty knife or plastic spatula, apply the epoxy resin to the crack. Make sure to work the epoxy resin into the crack and smooth it out as much as possible.

Step 4: Allow the repair material to dry

After you’ve applied the epoxy resin, you’ll need to allow it to dry. The drying time will vary depending on the type of repair material you used, so make sure to follow the instructions on the packaging.

Step 5: Sand the repair material

Once the repair material is dry, use sandpaper to smooth out any rough edges. Sand the area until it is completely smooth.

Step 6: Paint the bathtub

If your bathtub has a color, you may need to paint over the repair area to match the rest of the surface. Use bathtub paint to cover the repair area and make it blend in with the rest of the bathtub.

Preventing Cracks in Plastic Bathtubs

While it’s important to know how to fix a crack in a plastic bathtub, it’s even more important to prevent them from happening in the first place. Here are some tips for preventing cracks in your plastic bathtub:

  • Don’t use abrasive cleaning materials: Scrubbing your plastic bathtub with abrasive cleaners can cause scratches and lead to cracks over time.
  • Use a bathmat: A bathmat can help prevent slips and falls, which can be a cause of heavy impact on your plastic bathtub.
  • Don’t use hot water: Extremely hot water can cause plastic bathtubs to warp and crack. Stick to warm water instead.
  • Be careful when installing: If you’re installing a plastic bathtub yourself, make sure to follow the manufacturer’s instructions carefully to prevent stress fractures.


A crack in a plastic bathtub can be a frustrating problem to deal with. However, by following the steps outlined in this article, you can fix the crack and prevent any further damage to your home. Remember to take preventative measures to avoid future cracks in your plastic bathtub. With the right care and maintenance, your bathtub can last for many years to come.



Leave a Reply


I enjoy designing and curating experiences both virtually and in 3-dimensional reality. I have a Bachelor of Architecture from the Illinois Institute of Technology and currently practice professionally, but I also manage a few other ventures.
see more from me




What is Architecture Adrenaline?

Architecture Adrenaline is a digital platform for exploring the most sophisticated spatial concepts from across the globe. Discover innovative building techniques and materials available, worldwide.
Return PolicyShipping PolicyTerms & ConditionsPrivacy PolicyLogin
%d bloggers like this: