Sealing waterstop based on a special mixture of natural and synthetic rubbers and hydro-expansive hydrophilic agents: in contact with water, it increases its volume up to over 3 times the original size. SEALGUM 20.20 is a simple and easy to apply sodium bentonite waterstop; it does not require any special preparations of the media, pre-shaped seats etc.
Shelf-life: 12 months
Density: 1.26 kg/dm³
Hydroexpansive product: +300 %
Resistance to water pressure
B 2 _
- Roll 5 m
- Box: 9 x (Roll 5 m)
1.1 m/m: Use 1 metre of SEALGUM 20.20 for each linear metre, being careful to place 5-10 cm of the product alongside the end/start roll points to guarantee the permanent water tightness of the system.
Rigid construction joints and connections with safe and permanent hydraulic seal.
SEALGUM 20.20 must be laid on the bed surface and fixed by nailing (a steel nail plus washer approximately every 25 cm). The joints between the waterstop kerbs are sealed by simply flanking and not by overlapping the ends. The positioning must ensure a coverage of 18-20 cm in the concrete, in order to contain the expansive action generated hydration.
In the case of particularly uneven or rough surfaces, it will be possible to apply SEALGUM 20.20 with the aid of the hydro-expansive sealant in cartridge FLEXSEAL 300.
- Cement-based or lime-based mortars
Carry out preliminary expansion tests in case of aggressive groundwater or with a high salt content.
Waterstop, hydro-expansive kerb in sodium bentonite and expanding rubber. The bentonite water-stop joint bestseller. Reliable, high quality and cheap!
Hydro-expansive in extrudable cartridges. To use in all cases where it is difficult or impossible to install hydro-expansive kerbs (example: cove at the foot of a wall, waterproofing a caisson blade, etc.)
Waterstop, hydro-expansive, rubber kerb, to use in thin manufactured parts not subject to constant presence of water.
CLAYSEAL 25.20 SW
It is the version of CLAYSEAL 25.20 specifically for salt water and derivates of industrial or agricultural production (leachate or polluted water).