Can You Paint Over a Fiberglass Bathtub? (Here’s How)

Is your fiberglass tub looking a little dated? Keeping your fiberglass tub looking new can be challenging, but it can be done with the right paint and preparation.

Yes, you can paint a fiberglass tub. For best results, use spray paint explicitly formulated for plastic surfaces. Suppose the surface is in good condition and has been well-maintained. In that case, your fiberglass tub should be ready to prime and paint after a thorough cleaning with TSP (trisodium phosphate) or any heavy-duty degreaser.

This article will teach you how to paint a fiberglass tub like a pro. Follow these simple steps to give your tub a fresh new look.

What is a Fiberglass Bathtub?

Fiberglass is a plastic material made from fiber and resin strands formed and pressed together. Fiberglass bathtubs are covered with a gel coat, similar to paint but much more durable.

What Paint Can Go On Fiberglass?

Not every paint is compatible with every surface. Before you begin, make sure to read the label on your spray can carefully to verify that it’s formulated for plastic surfaces. Never use one type of spray paint categorized as “for metal” or “for wood.” It won’t stick to the fiberglass surface at all.

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Can You Paint A Fiberglass Bathtub?

Yes, you can paint a fiberglass tub with a spray paint formulated for plastic. This plastic-specific spray paint is available at most hardware stores and home improvement centers.

If you choose not to use special paint, your tub will be protected from the elements so long as the gelcoat remains intact.

Is Painting A Bathtub A Good Idea?

If your fiberglass tub looks old and outdated, painting it can give it a fresh, new look. If you don’t want the hassle of installing a completely new tub, but your fiberglass model has become damaged or worn from many years of use, it’s worth considering painting it to make it look better again.

How to Paint on Fiberglass Bathtub: Step by Step Guide


The cleaner your fiberglass tub is before you paint, the better results you’ll get. To prepare the surface for painting, use TSP (trisodium phosphate). This heavy-duty degreaser can be purchased at most home improvement stores and hardware stores.

Mix it with water and scrub down the entire surface with a sponge or brush. Rinse with a garden hose.


In addition to cleaning, you’ll need to rough up the surface of your fiberglass tub so that the paint will adhere properly. Use a medium-grit sanding pad and sand in crosshatch motions along the surface of the tub. Continue sanding until you see all dirt and debris removed from the fiberglass.


Apply a primer formulated for plastic surfaces according to the manufacturer’s directions. After allowing ample time to dry, apply two coats of spray paint formulated for plastic surfaces. Let dry completely between each coat.


The polyacrylic transparent acrylic sealer provides the perfect protection for your newly painted fiberglass tub. Use it in place of polyurethane or any other type of spray polyurethane. Be sure to follow the manufacturer’s directions for application and drying time before using your tub.

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Now your fiberglass tub can look great for years to come! This project is doable on the weekend, but it does require several supplies and some hard work. If you are uncomfortable with painting, hire someone to do it for you.

Can You Use Enamel Paint On Fiberglass Tub?

You can use enamel paint on the fiberglass tub to change the color, but you will need to take special precautions. Enamels are thicker than spray paints designed for plastic surfaces, so multiple thin coats must be applied to prevent drips and runs. Also, do not apply a clear coat over top of enamel paint.

Can You Use High Heat Spray Paint On Fiberglass Tub?

Spray paint manufacturers vary on whether their spray paint is safe for use in high heat areas, such as near heating elements.

Read the can carefully before purchase to make sure that any new coating you apply will be able to stand up against intense temperatures over time.

Can A Fiberglass Tub Be Recoated?

No, fiberglass tubs are not recordable. Once it’s painted once, the only option is to purchase a new one.

Can You Paint Directly Over Fiberglass?

Yes, you can paint directly over fiberglass. However, it’s essential to prepare the surface properly before painting to maximize adhesion and prevent damage from occurring.

What Is The Best Exterior Paint For Fiberglass?

Polyurethane paint is considered the best exterior paint for fiberglass. It provides excellent adhesion and water resistance to help prevent chipping, peeling, and flaking over time.

Can You Use Spray Paint On Fiberglass?

Yes, you can use spray paint on fiberglass surfaces. However, it’s essential to choose the right paint for the job. Spray paints are formulated for plastic or metal surfaces, not fiberglass. However, many spray paints are designed to adhere well to both types of material.

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For best results, use a high-quality spray paint designed for use on plastic surfaces.

How Do You Get Paint To Stick To Fiberglass?

  • Before purchasing paint, ask the manufacturer whether it is safe to use on fiberglass. Some paints will damage the surface of your tub.
  • When the sealer has dried completely, place a small amount of liquid soap in a spray bottle with water and shake well. Spray the entire surface and wipe clean for easy maintenance between regular washes.

Frequently Asked Questions

Can You Paint A Fiberglass Shower Stall?

Yes, it’s possible to paint a fiberglass shower stall. The process is the same as painting any other surface that requires priming and painting. Follow all safety precautions described on the can before starting this project.

How much does it cost to paint a fiberglass bathtub?

The cost of painting a fiberglass bathtub varies widely depending on what materials are required for the job. For instance, if you want to hire someone to do this for you, it will cost an extra around 300$ to 1000$.

Can you paint on fiberglass tub surround?

Yes, you can paint on your fiberglass tub surround. After cleaning and sanding the surface, apply a primer coat in a well-ventilated area.

Once that’s dry, follow directions for painting the tub and surrounding wall to provide an updated look and prevent damage from occurring due to moisture penetration.

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