Joints in between construction elements can be found in different parts of a construction, e. g. between precast concrete elements in facades, around windows and doors, between floors and walls, around storage tanks, etc.
Joint sealants have to meet various requirements depending on function and location of the respective joint.
The purpose of joint sealing generally is to:
- Prevent passage of media (air, water, chemicals, smoke etc.)
- Provide thermal and sound insulation
- Enhance the visual appearance of the construction
Our Range of Joint Sealing Solutions
Sika Provides a Full Range of Joint Sealants
- Long-term elasticity to accommodate joint movements
- Good and durable adhesion to common construction materials to ensure durable tightness
- Perfect handling for eicient, reliable and attractive joint sealant application
- Visual appearance that meets the demands of architects and owners
- Excellent mechanical properties, chemical resistance and weatherability ensuring sustainable performance even under most adverse conditions and loads
- Technical support and training for architects, speciiers and applicators
- Many approvals, external testing and best references
- Global supply chain
Why Elastic Sealing?
Temperature changes due to climatic, solar and weather efects results in expansion or contraction of the building elements. For the sealants connecting them this leads to permanent movement. In case of increasing temperatures, the elements expand, the joints become smaller and the sealant is compressed. In case of decreasing temperatures, the elements shrink, the joints become larger and the sealant expanded or elongated. In the latter case the adhesion of the sealant to the substrate is crucial. Thermal movements are considerably in case of large elements or when diferent materials are used for example a brick wall and vinyl window frame.
Structural movements can have several reasons. They can originate from settlement of the structure, vibrations or other loads like wind. Structural movements change the initial joint dimensions and consequently can apply considerable stress to the sealing material, often shear stress.