How to Renew a Shower With Epoxy Paint

Bathtub with slate tile surround and bronze hardware
Campwillowlake / Getty Images

A shower or tub surround that becomes dingy or scarred with age can be an expensive proposition to replace. If full-out replacement is not practical, one last-resort option is to refinish the tub or shower with option is painting or resurfacing. Normally, resurfacing—basically a process of painting the tub or shower with a two-part tub-and-tile epoxy paint—is done by pros who specialize in this kind of thing, but a budget-conscious homeowner might opt to do it themselves. These products, sometimes marketed as refinishing kits rather than paint, are said to work on ceramic tile, porcelain, fiberglass, acrylic, cast iron, or steel surfaces. These DIY products are widely available at home improvement centers, paint stores, and online retailers.

Realistic Expectations

Be aware that the effectiveness of these products is limited, and some homeowners who pursue this option come away somewhat disappointed with the results—and weary from the effort and work involved. Epoxy painting/refinishing requires extensive preparation of the surfaces in order to be effective, and the finished appearance usually falls a bit short of perfection. But epoxy tub-and-tile paint/refinisher can be an option for a bathroom that sees infrequent use or as a stop-gap measure in a bathroom where a more full-scale remodeling is planned for the future.

Before going down this path, remember that painting a shower is permanent. Future renovations will likely involve full-scale removal and replacement of the shower. Epoxy paint will stick very well, and you won't be able to remove it without damaging the shower materials. If you do end up with some failures, such as cracked, bubbled, or peeling paint, you can repair those spots, but you'll have to buy an entire paint kit to do so. This is because epoxy paint, once mixed, must be used in a matter of hours. You can't keep an old can of epoxy paint in your basement and pull it out for touch-ups. 

How Epoxy Refinishing Paint Works

Tub-and-tile epoxy paint is sold in a kit containing two cans of paint material—part A and part B. One part is a resin, the other a hardener/catalyst. When the two parts are mixed together, they undergo a chemical reaction and immediately begin to harden or cure. This chemical reaction is what makes epoxies so permanent and so strong. By contrast, conventional paints merely dry through a process of evaporation, not a chemical reaction. Not surprisingly, epoxy paints emit strong fumes and must be used with care, following the manufacturer's instructions precisely. Ventilate the work area with plenty of fresh air, using fans to pull fresh air into space and exhaust the fumes outdoors. You may be required to use respirator gear when using epoxy paints, and DO NOT ignore this recommendation.

Tools and Supplies You Will Need

  • Screwdriver
  • Drain wrench and adjustable wrench
  • Wire brush
  • Bucket
  • Scrub sponges
  • Bleach
  • Abrasive cleaner
  • Lime-away cleaner
  • Utility knife
  • Paint scraper or putty knife
  • 400/600-grit wet-dry sandpaper
  • 2-part epoxy refinishing paint
  • Respirator (if required)
  • 100% isopropyl alcohol (if needed)
  • Paint bucket
  • Roller tray
  • Paintbrush (fine-bristle varnish brush)
  • Roller with 1/4-inch roller cover
  • Rags

Instructions

The process for preparing a tub/shower and applying the epoxy refinishing paint differs slightly between products. Rustoleum's Specialty Tub and Tile Refinishing kit is a typical product; it is the basis for these instructions.

Remove Hardware, Clean and Repair the Surfaces

The success of a refinishing project depends on very careful and thorough preparation. This phase is considerably more time-consuming than the actual painting, but it is critical to a successful refinishing job.

  1. Remove metal drains and hardware, using the necessary screwdrivers and plumbing tools. Faucets do not need to be removed, but escutcheon plates should be removed, and tub spouts should be removed to provide access to all surfaces.
  2. Remove loose paint and rust with a wire brush or sandpaper.
  3. If damage is present, repair any chips and cracks with a patching compound appropriate to the wall material, such as Liquid Steel or Bondo.
  4. Remove any dirty or stained surfaces with an abrasive powdered cleanser and scrubbing sponge. Rinse with clean water and allow the surfaces to dry completely.
  5. Scrub the surface with an abrasive pad and a mineral-dissolving product such as Lime-Away. Rinse the surfaces, and repeat with a second scrubbing if necessary.
  6. Use a utility knife and putty knife or paint scraper to remove all caulk. Use isopropyl alcohol to clean surfaces that were caulked. For proper bonding, all surfaces must be perfectly clean of contaminants.

Scuff the Surfaces

  1. Use 400-grit wet/dry sandpaper to thoroughly sand the entire surface. (Check the refinishing kit instructions; rougher sandpaper may be recommended.) This sanding roughens the surface and makes it possible for the epoxy refinishing paint to bond. This is arguably the most important and time-consuming step of the entire project; do it thoroughly.
  2. Use a vacuum cleaner or clean cloths to wipe away sanding residue.
  3. Wipe down all surfaces with a tack cloth to remove the last traces of dust before painting.

Apply the Epoxy Refinishing Paint

For best results, epoxy refinishing paint should be applied at temperatures between 50 degrees and 90 degrees Fahrenheit, and at a humidity level below 85 percent. Make sure to ventilate the area well by opening windows or using fans.

  1. Open the resin container (usually called Part B), and mix the contents thoroughly.
  2. In a clean paint bucket, mix together the contents of pigment base and hardener/catalyst (Part A) containers. If the paint appears too thick, it can be slightly thinned by adding no more than 10 percent of isopropyl alcohol. Once mixed, the paint will remain workable for about 6 hours under normal conditions.
  3. Apply a complete coat of paint to the tub/shower surfaces using good-quality fine-bristle varnish brush or good-quality 1/4-inch-nap roller. Brush in one direction to ensure a smooth surface, and feather the edges to avoid hard lines between brush or roller strokes. Avoid excessive brushing and rolling. The goal is a smooth, even coat; don't worry about thick coverage with the first coat.
  4. Let the paint dry for at least 1 hour, then apply a second coat. Let dry overnight. Clean up brushes using isopropyl alcohol.
  5. Inspect the surfaces, and, if necessary, apply a third coat of epoxy refinishing paint.

Finish the Project

Allow the paint to cure for at least three days before reattaching all hardware. Conclude by applying new tub-and-tile that matches the epoxy paint color.