Why use epoxy glues for concrete? (2023)

You can’t use just any glue on a tough, porous material like concrete – you need a high-strength two-part epoxy glue for concrete.

Concrete epoxy adhesives: A quick intro

If you do a lot of DIY projects, you’re probably already familiar with two-part epoxy glues. Epoxy glues for concrete are no different – they consist of a resin and a hardener that, when mixed together, form incredibly strong and durable bonds.

Which epoxy glue for concrete do I need?

To decide which epoxy glue for concrete is best for you, first look at the object in need of repair and note down what all of the parts that need to be bonded to the concrete are made of. You will then need to find a two-part epoxy glue that can bond to all of those materials.

Unibond’s Repair Express Power Epoxy Putty can be used for filling gaps and repairing most building materials. When the two parts are combined, this high-strength, shock resistant epoxy putty forms a malleable paste-like substance that can also be moulded, sanded, drilled and painted.

How to use two-part epoxy glues for concrete

Now you’ve got an idea of the two-part epoxy concrete glue you’ll need, it’s time to find out how to use it.

  • Get ready. Make sure that the space you’re working in is well-ventilated and put on gloves. Gather your tools – utility knife and mixing tool, and put a protective cover on your work surface.
  • Clean and dry the surfaces you’re bonding thoroughly. Wash with warm soapy water, dry and make sure to pre-fit all the parts, so you know precisely how they go together.
  • Mix the two-part epoxy glue for concrete. Whether you choose to use an epoxy putty or an epoxy glue, you will need to mix equal parts of the resin and hardener together.

If you choose to use a syringe system, start by removing the plug and cut the ends off both syringes.Turn the syringe upside down and retract the plunger slowly to get rid of any air bubbles.Then press the plunger in, dispense equal parts of the two components and mix them together. At this point, you’re ready to apply the epoxy glue for concrete and make the repair.

If you choose to use Unibond’s Repair Express Power Epoxy Putty, you’ll need to mix the two parts of the putty by hand, following the instructions on the pack.

  • Apply the two-part concrete epoxy. Apply the epoxy glue or putty to one or both surfaces, as per the instructions, and remove any excess epoxy glue as quickly as you can.
  • Leave it to dry. Support or clamp the bonded surfaces together and leave them to dry for the time specified on the product’s instructions. Also: check how long you need to leave the repair until you can sand, paint or drill it.
  • Finish. Clean away any excess epoxy glue immediately (before it sets) using a cotton ball dampened with acetone or vinegar. If you see excess epoxy once the project has dried, you can cut this off using a sharp knife.

Need to add other glues to your DIY arsenal?

Check out Unibond’s full range of adhesives.

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