Skip to Content


Concrete bonding

With the right concrete adhesive, you can bond a wide range of construction materials with different textures to concrete or repair existing concrete structures. Read on to learn about suitable solutions and using concrete bonding adhesive for repairs.

Concrete blocks in a landscaping project

Concrete adhesive serves structural and aesthetic purposes for many projects.


Concrete adhesives can assume many forms, from polyurethane sealants and structural epoxies for concrete to repair mortar and bonding adhesives. Many products are formulated for specific purposes, such as installing insulation material or sealing cracks, and for various layer or gap thicknesses

A prominent crack in a concrete floor

The right concrete repair adhesive will make this floor look like new.


When selecting your construction adhesive for concrete, check the technical data sheet (TDS) whether it is formulated for vertical and/or horizontal applications, whether it is suitable for your concrete class, which materials it can bond, and how much it will shrink.


If you want to smooth out concrete, fill cracks or gaps, or repair damaged substrates, you need a good concrete repair adhesive, such as a filling compound or repair mortar. Many products are formulated for different layer thicknesses.

For example, use Polybit Polycrete MC for applications between 10 and 250 mm, while a product like Polybit Polycrete FC is ideal for smaller repairs.


Polyurethane sealants formulated for concrete will also seal joints and gaps in structures like floors and walls.


Many general adhesives bond concrete and other materials. However, concrete bonding adhesives produce better results when used with concrete. Many of them are formulated with specific projects and materials in mind.


This section gives hints on how to use Polybit Polycrete MC to level out concrete surfaces and repair damaged substrates. Before beginning, read your TDS for information such as application temperature and humidity. You can also watch this video from Henkel Polybit, which demonstrates key steps.

You need to accept cookies to play this video

  • Materials and safety. Wear gloves and safety glasses when applying concrete adhesives. You need clean water, a mixing container, a mixer, a steel/plastic trowel or sponge, tools to mechanically prepare the substrate, and agents to clean the concrete (if necessary).
  • Prepare the substrate. Remove any contaminants or standing water. Prepare the substrate mechanically (e.g. abrasive blasting, wire brushing, grounding, or milling).
  • Reinforcement. Prepare and treat any reinforcement bars/structures as stated in the TDS.
  • Contact layer. Moisten the substrate and apply the contact layer according to the product instructions.
  • Prepare mortar. Using the mixer, mix the contents of the package with water as per the TDS until you have a lump-free mass. Use cold water in warm temperatures.
Wet mortar in a container

Once there are no more lumps in your concrete adhesive, you can trowel it onto the substrate.

  • Curing. The solution usually features rapid drying. You can help the curing process with a non-degradable type of curing compound or wet hessian cloth.
  • Additional protection. Cover the surface of the project with acrylic paints or flexible insulation layers to protect it against water, aggressive agents, corrosion, and other factors.
Looking for more Premium Products?

You can find mortars and other products for masonry on Polybit’s site.

  • Mortars & Auxiliaries
    Mortars & Auxiliaries

You may be interested in ...

  • Porcelain Tile Adhesive

    Selecting the best product for the job 

  • PU Waterproofing

    Easy and effective 

  • Waterproofing Concrete

    With a spray gun or brush 

  • Epoxy Sealers

    Heavy-duty protection 

  • How to fix Cracks in Walls

    Get cracking! 

  • Acrylic Waterproofing or Silicone-Rubber

    Weighing your options 

  • Outdoor Tile Adhesive

    Choose the right one for durability 

  • Epoxy Tile Grout

    Expert Recommendations 

  • Basement Waterproofing

    Primed and sealed right with bitumen systems 

  • When to use Primer on Walls

    Expert tips and products 

  • Mosaic Tile Adhesive

    Tips on application and products