How to Epoxy Plumbing Fittings


Plumbing fittings may develop leaks after some time. If you can't replace the fitting, then an epoxy fix may be just what you need. Epoxy can be used on all types of plumbing fittings including, plastic, steel, copper, pot metal and even concrete. Most epoxy mixes dry fast and become hard like concrete. You may also bond fittings together using epoxy glue.

Things You'll Need

  • Eye protection
  • Gloves
  • respirator
  • Knee pads
  • 400-grit sandpaper
  • Two-part epoxy
  • mixing container
  • Wooden mixing stick

Epoxy Leak Repairs

  • Put on all protective gear.

  • Turn off the water supply to the plumbing fitting you are working on. Let it dry for several hours because the water will need time to drain out. Most epoxy glues have to be applied to a dry surface, although some can be installed underwater.

  • Lightly sand down the area where the leak is, using 400-grit sandpaper.

  • Apply a two-part epoxy by mixing the two agents in a small plastic container. Use a small wood stir stick to do this. Mix well, so the two agents bond.

  • Apply the epoxy mix to the leak area. Wrap the fiberglass tape around the leak area, overlapping it as you go. Apply more epoxy to coat the fiberglass tape. Let the epoxy thoroughly dry overnight.

Bonding Plumbing Fittings With Epoxy

  • Clean the plumbing fittings with a good degreaser.

  • Apply the epoxy mix directly to each fitting that you want to bond together.

  • Twist or turn the fittings until tight. The epoxy usually sets up fast, so you don't have much time to work. Allow drying time.

Tips & Warnings

  • Some epoxy repair kits come with a fiberglass tape that you apply before the epoxy itself.

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  • Photo Credit plumbing image by Inger Anne Hulbækdal from
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