Clayseal 25.20 SW
Clayseal 25.20 SW is a simple and easy to apply sodium bentonite waterstop; it does not require any special preparations of the media, pre-shaped seats etc. It is easily fixed by nailing and does not require any special protection. In contact with water (even salted or polluted), it increases its volume through the formation of a stable colloidal system that guarantees the permanent hermetic sealing of the connection; the initial expansion is delayed through a retardant coating with respect to the first contact with water, to avoid deformations in the initial hardening phase of the fresh concrete.
The expansion of Clayseal 25.20 SW in salt water or water with leachate and pollutant content, is at least 180% (just under twice its initial volume). Potential expansion in case of contact with clean water could be significantly higher (even of the order of 1000%).
Fields of application
Producing rigid construction joints (non-expanding) and safely and permanently hydraulic sealing connections in environments with salt water, sea water, organic leachate and pollutants of various kinds (for example landfills, biogas digesters, etc.).
Allowed supports
Concrete
Cement-based or lime-based mortars
Prefabricated concrete
Rock walls
Preparation of supports
Prepare the smoothest and most planar laying surface, using Repar Tix to compensate for any inhomogeneity, and accurately remove crumbling, non-adhering, powdery parts.
Mode of use
Apply by hand the waterstop in sodium bentonite Clayseal 25.20 SW in the provided position. The product should be secured with nails: a steel nail and a washer about every 20-25 cm. The sealing of joints between the waterstop beads is ensured by the simple approach of at least 10 cm and not by overlapping the ends.
For particularly complex applications, is available the specific cage of steel wire Bentonet, with square mesh of 13x13 mm, in profiles of 1 meter each.
The positioning must ensure a concrete covering of 10-12 cm in order to contain the expansive action generated by hydration.
Although the product has a delayed expansion of 48h, it is not recommended for use in cases of earlier time-frames or with excessive humidity (for example in the presence of puddles).
Technical specifications
Longitudinal elongation at break
60 %
Consumption
1.1 m/m: Use 1 metre of Clayseal 25.20 SW 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.
Packaging and dimensions
Box: 6 x (Roll 5 m)
Pallet: 48 x (Box 21 Kg)
Storage and conservation
Store the product in its original packing, in a fresh and dry environment, avoiding frost and direct sunlight.
Warnings
The general information, along with any instructions and recommendations for use of this product, including in this data sheet and eventually provided verbally or in writing, correspond to the present state of our scientific and practical knowledge.
Any technical and performance data reported is the result of laboratory tests conducted in a controlled environment and thus may be subject to modification in relation to the actual conditions of implementation.
Azichem Srl does not assume any liability arising from inadequate characteristics related to improper use of the product or connected to defects arising from factors or elements unrelated to the quality of the product, including improper storage.
Those wishing to utilise the product are required to determine prior to use whether or not the same is suitable for the intended use, assuming all consequent responsibility.
The technical and characteristic details contained in this data sheet shall be updated periodically. For consultation in real time, please visit the website: www.azichem.com. The date of revision is indicated in the space to the side. The current edition cancels out and replaces any previous version.
Please note that the user is required to read the latest Safety Data Sheet for this product, containing chemical-physical and toxicological data, risk phrases and other information regarding the safe transport, use and disposal of the product and its packaging. For consultation, please visit: www.azichem.com.
It is forbidden to dispose of the product and/or packaging in the environment.
