Waterproofing of construction and movement joints is critical to minimising water ingress and creating a secure waterproof system. Sika’s joint waterproofing solution, the Sikadur®-Combiflex® System, is a high-performance system designed to seal construction joints, expansion joints, connections and cracks in watertight concrete structures. The system accommodates irregular and multi-directional movement while maintaining a durable and secure waterproof seal, making it suitable for demanding structural applications.
Advantages of Sikadur-Combiflex® Joint Sealing System
- Provides reliable waterproofing for construction, movement and expansion joints, pipe penetrations and cracks
- Accommodates irregular and extreme joint movements
- Excellent adhesion to a wide range of substrates
- Resistant to high water pressure
- Easy to install and adapt to complex construction details
- Suitable for watertight concrete structures and precast components
- Simple to control and repair if required
- Approved for use in contact with drinking water
Typical Applications
Basements
- Water tightness with high durability
- Easy to control / repair
- Independent of concreting works
- High joint movement capacity
Bridges / Tunnels
- De-icing salt resistance
- UV resistant tunnel ventilation ducts
- Airtight
- Accommodates variable joint widths
Drinking Water Tanks
- Approved for use in contact with drinking water
- Long-term water resistance
- Ideal for new and repair works
- Easy to control / repair
Swimming Pools
- Resistance to ozone, chlorine and UV light
- Easy to clean
- Non abrasive to skin
Structural Repair
- Watertight crack sealing
- Resistant to water pressure from both faces / sides of the structure
Sewage Treatement Plants
- Resistant to sewage
- Good abrasion resistance
- Independent of concreting work
- High joint movement capacity
Ground Water Protection
- Chemically resistant
- High environmental security
- Watertight sealing
Facade Joints
- High joint movement capacity
- Overpaintable (adhesive)
- External weathering resistant
- UV light resistant
Our Range of Sikadur-Combiflex® Joint Sealing Products
Typical Types of Joints in Structures
Construction joints are designed to split areas of the structure into separate concrete sections for work scheduling reasons, or as a structural measure to transfer load, for example. The reinforcement in construction joints is therefore continuous through the joint.
Connection joints are flat or indented joints which split the concrete section through its full thickness without a defined joint gap. The reinforcement in connection joints is discontinuous. When the concrete section contracts, joint movement (joint opening) is possible. When it expands, pressure transmission is possible.
Movement or expansion joints split components through their full thickness with a joint gap of defined width. The reinforcement in movement joints is discontinuous. Movement joints allow differential movement due to temperature variations and/ or load or settlement in one or more directions of the areas, sections or structures separated by the joint.
Control joints in walls, for example, are intended for defined crack control by engineered concrete cross-section weakening and formation of a controlled point of cracking through the concrete. This relieves stresses due to temperature and shrinkage, which thereby prevents uncontrolled cracking in the wall. Cracking takes place in the designed and crack-induced position instead.