Negative Sealing Using Crystal Technologies and Injections

Negative Sealing Using Crystal Technologies and Injections

Apart from the familiar and traditional sealing systems used (often) for positive sealing, our company practices implementation and study of advanced sealing techniques .This is done in order to refine the range of the solutions offered to its customers and to provide a complete sealing envelope even in cases requiring custom design.

Injection sealing is performed using low- or medium-pressure electrical or pneumatic systems of liquid polyurethane agents (double or single component), acrylic gel or crystalline bonding materials applied to existing cracks in placed or sprayed concrete surfaces.
These injected materials have unique qualities of reacting to moisture or water. As part of the treatment process, materials that chemically react by expanding or solidifying upon contact with water or moisture are inject at pressure into cracks or voids (including pockets of segregated concrete), thus preventing passage of water through the wall into the building.

The injection sealing method is suitable for places where water permeates (groundwater or rainwater), most often in underground structures: basements, shafts, car parks, bomb shelters — where negative sealing (from the inside) is required. However, injection sealing can be performed both from the outside (positive side) and the inside of the building, against the water pressure from outside.

Basic Procedure for Injection Application

  1. Mapping, examining and marking all the cracks to be sealed.
  2. Examination of the concrete’s condition and measuring its thickness.
  3. Drilling in the concrete for insertion of the injection valves (packers) at a planned angle..
* This sealing method requires professional and skilled personnel certified by the manufacturer or importer of the materials.
Crystal sealing systemsare designed to address negative and positive sealing. The system is specified as an additive to placed concrete or as an application system to be implemented after building the concrete frame or element. The system is applied by rubbing or impregnation of the sealant on the concrete to be sealed. The crystalline material’s properties are to be absorbed and migrate in the concrete base. Upon an encounter with moisture and water, a catalytic process of reaction and crystallization of the materials is created, thus rapidly preventing the passage of liquid molecules, but not of air molecules. The treatment is analogous to inoculation — the reaction can occur even years after the system is applied. This technique has been proven to have significant benefits in extending the life of buildings, preventing corrosion and rust, and it also resistant to chemicals and carbonation and can be applied positively or negatively.

Basic Procedure for Application of a Crystalline Sealing System:

  1. Performing preliminary concrete rehabilitation
  2. Mapping areas to be sealed by the crystalline system
  3. Application of the system by brush, roller or spray either positively or negatively.
* This sealing method requires professional and skilled personnel, certified by the manufacturer or importer of the materials.