Positive sealing with a variety of systems

There are several positive sealing systems available in the market:
Cementitious systems (polymeric cement based), bituminous systems (by-product of crude oil refining process, or by the other name “tar”) and polyurethane systems.
Implementation processes and integration of critical impact systems on project success.
Combining concrete restoration systems together with plaster systems and decorative finishing on a variety of types requires the use of material systems that know “talk to each other”, enabling continuity between the different systems without creating failure between the layers.
Therefore, every project requires a complete and broad specification that defines the systems and their interrelationships – including curing times, types of applied color families, types of adhesives and the interval of application (window of time) between system and system.

Preparing the area before applying the sealing system is crucial to the success of their chosen sealing solution.

1. Complete or partial removal (as needed) of the previous sealing system until stable infrastructure is required if concrete restoration is required for the infrastructure.
2. In case of sealing on existing tiles, care should be taken to roughen and remove the shine of the tiles and in addition, ensure full sealing of the existing joints (fugues).
3. Complete drying of the sealing infrastructure.
4. Cleaning the infrastructure from loose particles, dust and other contaminants.
5. Application of rollers (rounded / triple casting) to horizontal (floor) to vertical (wall) fences to allow good sealing and cracking in the corners of the infrastructure.
6. Filling nozzles / holes (including segregations) / Handling cracks and stitches in existing infrastructure while creating a homogeneous, smooth, uniform texture before applying the sealing system.                                                                                                                                                                                                                                                                                                       7. Videor / gradient creation in existing infrastructure (1.5-2%) assuming that the sealing system implemented transfers the existing surface and no gradients can be repaired.
8. Treatment and preparation of drains, sleeves and other types of pipes that are expected to pass through the surface intended for sealing.

Choosing a sealing system as a suitable sealing solution over time is a direct derivative of a number of characteristics that influence the writing of the technical specifications.


feature\System type Cement sealing system Bitumen sealant system Polyurethane sealing system
UV sun resistance No resistant No resistant(Requires coating) resistant and even reflective
Application Restrictions Priority for application on cementitious infrastructure such as water reservoirs or concrete walls Priority for application in non-sun exposed areas on a variety of infrastructure Can be applied to all types of infrastructure, including metal debts
Use in a damp / wet environment Can be applied to moist infrastructure Can be applied to moist infrastructure Is not resistant and even sensitive to moisture and water (up to 4% moisture)
Using a foundation layer Not required required Usually not required
Drying speed Quick – half an hour to an hour for touch Medium – hours to days for final drying Fast to medium – several hours
Make a cure Yes – mandatory no no
Adapted to negative sealing yes no no
Flexibility with the other systems Low (30-40%) High ( above 500%) Medium (100-200%)
Adapted for drinking water yes no yes-Depends on the product
System parts Single / Two Components Usually single components Usually single components
Application Method Brushing / scrolling Brushing / scrolling / splashing in dedicated earls Brushing / scrolling / splashing in earls
“Green” version yes no yes
Costs compared to other systems Medium inexpensive expensive