Repairing Fiberglass Tub Cracks in Just a Couple of Hours

Choosing a fiberglass tub for your bathroom has its advantages and disadvantages. This style is lighter, easier to install and to keep clean then the iron type. However, fiberglass is not so durable and so you face more chances to have to deal with some cracks in the tub. If you get a crack in your fiberglass tub, follow the simple steps below to fix it on your own.

Tools and Materials

  • Resin
  • Hardener
  • Fiberglass cloth
  • Rag
  • Sandpaper
  • Plastic filler
  • Putty knife
  • Newspapers

Step 1 – Protect the Area Around the Tub

Use newspapers, rags or any other kind of materials come in handy to cover the area around the tub. Because you are working in the bathroom the tub is probably surrounded by other similar surfaces, covering them will prevent damaging or getting them dirty.

Step 2 – Sand the Cracked Area

Use sandpaper of 60 or 80-grit and sand the cracked area including also a surface at approximately 3 inches around the crack.

Step 3 – Check Your Tub Kit for Materials and Specifications

Check your tub kit for any specific instructions. The kit should include the resin, hardener and fiberglass patch cloth that you need to make repairs.

Step 4 – Prepare the Patches

Use the fiberglass cloth to make 3 separate patches. Use the crack dimension to set the size of the patches, starting by making one a little bit smaller then the crack, the second one smaller then the first and the last one smaller then the second. Follow the instructions in the kit to use the resin and hardener to make a mixture.

Step 5 – Place the Patches

Pass the 3 patches through the mixture, starting with the smallest patch, and place them one after another over the crack. Before doing anything else, you have to let them dry for a few hours.

Step 6 – Sand the Patches

Thoroughly sand the dried patches, and then wipe the remaining residues using a rag in order to get a very clean surface. Use a putty knife to apply some plastic filler over the treated area. Let it dry before proceeding to the next step.

 Step 7 – Do the Final Touches

Use the sandpaper to blend the dried filler into the surface of the tub and then use a proper colorant to bring the treated area to your tubs’ color so there will be no difference between the treated area and the rest of the tub. Check your tub kit instructions for more information on how to obtain the right color. After letting it dry for a few hours make the final adjustments by using first a 220-grit, then a 320-grit and finally 400-grit sandpaper to make the treated area undetectable.