Injection is well-established as the 'go-to' solution for restoring the integrity and function of inadequate, deteriorated, or damaged structural waterproofing systems in existing concrete and masonry structures. Additionally, in modern construction, injection is often included as an integral part of the engineered waterproofing system, designed and installed to provide long-term structural sealing and waterproofing in critical areas.
Injections in masonry structure
Injections in concrete structure
Common Problems
Underground structures, particularly in basements, station boxes, and turbine houses whether newly built or existing, often face challenges like cracks, water leakage, and sealing issues. These problems can compromise the structural integrity and long-term performance of the structure. Below are some common problems where injection techniques are applicable.
In existing structures
- Structural crack repair
- Water stopping / waterproofing of cracks, joints and cavities in masonry or concrete
- Damp proof courses in masonry
- Area and curtain injections
In new structures and construction
- Water stopping/ waterproofing of cracks, joints and cavities
- Sealing of pipe ducts
- Structural crack repair
- Area and curtain Injections
- Injection hoses
- Membrane compartment systems
Examples in Practice
We dive deeper into three common problem areas, and explore the target to solve these problems, along with the benefit and most recommended Sika solutions.
- Wet, dripping, leaking or flowing water in cracks, joints or honeycombs
- Failed water bars and leaking expansion joints
- Leaking construction joints
Target:
Temporary water stopping
Permanent waterproofing
Benefit:
Large expansion upon water contact
Fast reaction, efficient, one-component pump
Recommended solutions
Target:
Permanent waterproofing
Benefit:
Extreme adhesion and flexibility
Cleaning with water only
Recommended solutions
Target:
Designed waterproofing
Hose injection (SikaFuko®)
Benefit:
Unique steel passivating resin
Multiple re-injections possible
Recommended solution
Choose the Right Products for Your Specific Problems
If your basement is leaking, you will first have to find out the source of the water ingress and assess the condition of the structure and site to define which solution would fit for your purpose. Injection products come from various technologies – epoxy, cement, polyurethane, acrylate, etc. – each with different features and applications.
If you are not sure about the situation, contact our waterproofing and injection expert for solid technical advice. Sika has extensive experience in a variety of project types across different countries. We also have local technical departments ready to support you on your job sites.
Author
Matthias Ohnesorge
Corporate Product Engineer
Target Market Waterproofing
Sika Services AG
Advantages of SikaInject® Systems
Injection can permanently seal even the smallest cracks and voids, providing a comprehensive waterproofing solution.
The materials used for injection can adapt to the movement and settling of the structure or the ground. Injection can be applied at any time— whether during initial construction or later to extend the service life during subsequent repairs or renovations— depending on the project’s specific requirements.
Injection can often be performed without extensive excavation or demolition, making it a less disruptive solution for existing structures or ground. This approach avoids the expensive costs associated with structural repairs and reduces operational downtime.
High-quality injection materials can provide long-lasting waterproofing protection, enhancing the lifespan of the structure.
Very often, injection is the only effective solution to repair an existing structure with water leakage.
Main SikaInject® Materials and Their Uses
Rigid injection materials
Rigid injection materials for cracks and joints, as well as structural repair:
- Epoxy
- Cement
- Structural polyurethane (PU)
Flexible injection materials
Flexible injection materials for water stopping at cracks, joints, cavities in masonry, curtain, compartments:
- Polyurethane (PU) - resin and foam
- Acrylate
