How to set anchor bolts into concrete with epoxy

Written by c.l. rease
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Chemical set, or epoxy anchors, use a two-part epoxy adhesive to hold the anchor bolt in the concrete. To ensure that an epoxy set anchor bolt is structurally sound, you must properly drill and prepare the concrete hole. This includes using the manufacturer recommended drill bit and thoroughly cleaning the hole in the concrete before you install the anchor. Failure to comply with the manufacturer's installation instructions can result in serious injury to persons and property.

Skill level:
Moderately Easy

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Things you need

  • Safety glasses
  • Hammer drill with depth gauge
  • Masonry drill bit
  • Electrical tape
  • Round wire brush
  • Air nozzle
  • Epoxy anchor bolt kit
  • Fastener

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  1. 1

    Read the manufacturer's installation instructions to determine the appropriate sized masonry drill bit needed for your application.

  2. 2

    Insert the masonry drill bit into the hammer drill, and put on your safety glasses.

  3. 3

    Set the depth gauge of the hammer drill per the manufacturer's recommendations. Wrap electrical tape around the masonry drill bit, with the bottom of the electrical tape aligned with the hammer drill's depth gauge.

  4. 4

    Place the point of the masonry drill bit against the concrete wall in the location that you need to install the epoxy set anchor bolt.

  5. 5

    Drill the hole into the concrete, stopping when the depth gauge or the electrical tape meets with the surface of the concrete.

  6. 6

    Use a wire brush to remove the concrete dust that accumulated in the hole while you were drilling. Turn the wire brush as you push it into the hole, and pull it straight toward you to remove the concrete dust.

  7. 7

    Repeat Step 6 until no large quantities of dust emit from the drilled hole.

  8. 8

    Place the end of the air nozzle into the bottom of the concrete hole. Pump air into the hole to remove loose dust.

  9. 9

    Remove the plastic plug from the epoxy tube. Insert the tube of two-part epoxy into the mixing gun supplied with the epoxy kit.

  10. 10

    Attach the nozzle to the epoxy tube, and slide the end of the tube into the concrete hole.

  11. 11

    Squeeze the handle of the epoxy dispenser, and fill the concrete hole between half and two-thirds of the way full with epoxy.

  12. 12

    Push the fastener into the epoxy filled concrete hole, and turn the fastener in the hole to further mix the concrete.

  13. 13

    Steady the anchor until the epoxy hardens.

  14. 14

    Allow the epoxy to cure for the recommended length of time before you apply torque to the fastener.

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