Repairing an Acrylic or Fiberglass Shower Using a Filler Kit

Fiberglass or acrylic bathtubs and showers are easy to install and are often less expensive than other options, such as a cast-iron tub or ceramic tile shower stall, making them a favorite for budget-conscious homeowners. Over time, though, the acrylic or fiberglass surfaces can get dented or cracked, often because of flexing of the walls of the fixture over time. Sharp blows can also dent, crack, or punch holes in fiberglass or acrylic. A variety of options are available at this point, including wholesale replacement of the bathtub or shower, or installing a new liner inside the old tub or shower.

But one fix that is much more cost-effective is to fill the crack or hole using a fiberglass/acrylic repair kit. These materials include epoxy-like materials similar to the compounds used as filler in automobile body repairs. In fact, some people use these automotive body fillers to make repairs on tubs and showers, or even sinks and toilets.

Acrylic/Fiberglass Repair Kits
Rather than using automotive body filler, though, a better choice is to buy a repair kit that is factory-matched to your tub or shower. These kits have filler paste already tinted to match the color of your fixture, and will include much of what you need to make the repairs—only a few extra tools and materials are required. A single kit may provide enough material to make several repairs. One manufacturer of fiberglass/acrylic repair kits (but not the only one) is Multitech Products, who makes many of the official repair kits sold by the plumbing fixture manufacturers themselves.

There are many repair and resurfacing products available, so make your choice carefully. For simple cosmetic repairs, most people find that a paste-type fiberglass/acrylic kit is easier to use than a spray product. Paste kits may include:

Base coat paste and catalyst
Lightening and darkening toners
Rubbing compound or buffing bar
Wet/dry sandpapers

Some types of products also include a clear top coat that is sprayed or brushed on.

You Will Need
Acrylic/fiberglass paste-type repair kit, color-matched to your fixture
Utility knife
Power drill with small drum sander or grinding disks
Wet/dry sandpapers (220-, 320-, 400-, and 600-grit)
Nail polish remover or acetate
Clean cloths or paper towels
Heat gun
Buffing bonnet
Protective gloves
Ventilator mask

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