Complete Guide to Repair Acrylic Bathtub

While most bathtubs are durable and reliable, prolonged use can lead to various issues due to external factors. Homeowners may find this concerning because replacing a bathtub can be a costly expense. Therefore, they often seek repair methods. However, repair methods may vary depending on the material and finish of the bathtub. To address this, Giving Tree Home has prepared this acrylic bathtub repair guide to assist homeowners who already purchased acrylic bathtub. Let's dive in!

Recognizing and Identifying Acrylic Material

As expected, most people cannot discern the material of their bathtub. To ensure compatibility between this guide and your bathtub, you should identify whether your bathtub is acrylic. The best way is to inquire with the customer service of the brand from which you purchased the bathtub. However, if the brand has closed down, you'll need to identify it yourself.

The simplest method is to touch the surface of the bathtub. If it feels neutral or warm, it's likely acrylic but if it feels cold, it's probably not acrylic.

Additionally, you can use a magnet to check if it sticks to the bathtub. If it does, it's likely enameled cast iron, not acrylic.

Lastly, if your bathtub has been in use for a long time, check for yellowing or discoloration. Acrylic bathtubs typically have excellent oxidation resistance, so if you notice yellowing, it's probably not acrylic.

Remember not to rely on the texture of the bathtub's surface to determine if it's acrylic, different finishes can vary.

Acrylic Repair Kit

For DIY enthusiasts, minor defects in acrylic bathtubs can be addressed at home. Before you start, make sure you have the following tools and materials:

  • Filler
  • Resin
  • Colorant
  • Hardener
  • Sandpaper
  • Putty knife
  • Clean cloth
  • Alcohol
  • Polish
  • Polishing cloth

Repairing Acrylic Bathtub Scratches

Repairing Acrylic Bathtub Scratches

Due to the unique properties of acrylic, it's more prone to scratches from keys or other sharp objects compared to enamel bathtubs. However, these scratches can be repaired. The key is to assess the severity of the scratch. For minor scratches, use higher-grit sandpaper to restore them. For deeper scratches, start with 400-grit sandpaper to lessen the scratch, then use 800-grit sandpaper for finer processing. Finally, polish and rinse the surface to check how well it blends with the surrounding area.

Repairing Cracks or Holes in Acrylic Bathtub

Cracks or Holes in Acrylic Bathtub

This is a more severe defect and requires the use of filler, resin, hardener, and any colored pigments mixed together. First, check if there are any dirt or debris in the repair area. If so, clean the bathtub before applying the repair material to ensure proper adhesion. Afterward, use a dry cloth to wipe the bathtub and keep it dry.

Before starting the repair, familiarize yourself with the instructions included in the acrylic repair kit. Then, use a putty knife to apply the filler to the affected area. Work slowly to ensure the filler fills all cracks or holes. Aim for a smooth surface to minimize sanding later.

Wait for the filler to dry as per the kit instructions, usually a few hours. Once hardened, use 600-grit sandpaper to sand the area until it's level with the surrounding area. Be careful not to over-sand to avoid damaging the surrounding acrylic.

Next, apply some polish to a cloth and polish the repaired area. This step will restore the shine and ensure the repaired area matches the rest of the bathtub surface. Follow the polishing steps gently in circular motions until the surface achieves the desired gloss. You may need to repeat the polishing process once or twice, so make sure you do it correctly.

7 Things to Note When Repair an Acrylic Bathtub

  • Ensure the bathtub is thoroughly cleaned before beginning any repairs.
  • Make sure the bathtub is completely dry to avoid affecting the filler material.
  • Do not use abrasive, highly acidic, or highly alkaline cleaners, or cleaners containing bleach on acrylic bathtubs. Instead, use a gentle soap or dishwashing liquid mixed with warm water, or a specialized acrylic bathtub cleaner.
  • Ensure that the repair material matches the color of the bathtub to avoid color discrepancies.
  • Start with lower grit sandpaper and gradually move to higher grits for a smooth finish.
  • Regardless of the type of damage, always polish the repaired area after completing the repair.
  • For cracks or holes, make sure to check for leaks after the repair is complete.


While fixing acrylic bathtubs may seem challenging and time-consuming, it can be relatively easy and straightforward with the right tools and procedures. To ensure your acrylic bathtub remains well-maintained for long-term use, consider these tips. Regularly clean the surface with non-abrasive cleaners to prevent scratches from worsening. Avoid using harsh chemicals or rough materials during cleaning, as they may damage the surface. This means that if your bathtub sustains minor damage, you should repair it immediately and ensure it receives proper maintenance to prolong its lifespan and maintain its appearance. If the damage is severe or you're unsure about the repair process, it's advisable to consult with professionals.