How to Install Chemical Anchors in Concrete (Beginner to Pro Guide)

If you’ve ever tried mounting something heavy into brick or concrete - like a gate motor, handrail, steel bracket or shade structure - you already know that wall plugs and rawlbolts don’t always hold.
That’s where chemical anchors come in.
They are used by structural engineers, steel installers and professional builders because they create an incredibly strong bond between steel and concrete.

What Is a Chemical Anchor?

A chemical anchor uses a two-part epoxy resin that is injected into a drilled hole. When you insert a threaded rod or rebar, the resin hardens around it, creating a permanent bond.
Unlike mechanical anchors, chemical anchors:

  • Do not expand
  • Do not crack concrete
  • Work in weak or old masonry
  • Handle very high loads
  • Never loosen with vibration

What You Need

From the DISA range (all available in our store) you’ll need:

  1. AnchorFix Polyester or Vinylester cartridge
  2. Mixing nozzle
  3. Mortar caulking gun
  4. AnchorFix dust pump
  5. Threaded rod

Step-by-Step: How to Install Chemical Anchors

  1. Drill the Hole : Drill the correct diameter and depth into the concrete or brick. Always follow the size recommended for the threaded rod.
  2. Clean the Hole (Most Important Step) : Use an AnchorFix dust pump to remove all dust and debris. If dust stays inside, the epoxy will bond to the dust — not the concrete.
  3. Inject the Resin : Insert the cartridge into a mortar caulking gun and attach the mixing nozzle. Pump resin into the hole from the bottom up until it is about two-thirds full.
  4. Insert the Threaded Rod : Push and twist the rod into the resin. Excess resin should flow out - this means the hole is properly filled.
  5. Let It Cure : Allow the epoxy to harden (usually 30–60 minutes). Once cured, you can tighten the nut and load the anchor.

Polyester vs Vinylester – Which One?

Polyester - Best for light to medium loads, dry concrete, brick
Vinylester - Best for heavy loads, damp areas, cracked concrete

Why Professionals Use Chemical Anchors

Because they:

  • Hold massive loads
  • Never loosen
  • Work in old or cracked concrete
  • Are vibration resistant
  • Are approved for structural installations
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