Waterstops Hydroexpansive


Waterstop for casting joints subjected to high hydrostatic pressure. Based on synthetic rubber. Used to seal horizontal and vertical joints. Suitable for tunnels, car parks, water treatment plants, tanks, pipelines, sewer trunk lines and for any underground work in general subject to occasional or permanent contact with water.

- Up to 5 bar water seal capacity
- Not subject to washout
- High expansion capacity
- Chemically stable, resistant to alcohols, weak acids, many solvents and salts in solution


synthetic rubber

Specific weight:




Hydrostatic load resistance:

up to 50 m column of water



Expansion: min 150% max 200%


(20 x 10) mm; reel length: 10 m.
Solubility in water: not soluble
Density at 20°C: 1.3-1.6 g/m
Resistance to tensile stress : da 1.75 a 2.30 kg/cm2
  non corrosive

The application surface must be even, in good condition, clean and dry.
The waterstop must be secured using nails with a wide head and/or specific adhesives.
It is important that the product adheres to the support, even during the first concrete casting stage.
In joints between one tape and another, the tape must be applied so that the transversal section of the first tape adheres to the transversal section of the second, or so that the two tapes overlap by at least 10 cm. Side confinement must measure at least 8 cm. In the case of very damp concrete, it is advisable to start pouring the cast as soon as possible and anyhow within 24 hours of the waterstop coming into contact with the water.
Considering that the aforementioned waterstop is not reinforced, it is strongly advisable not to pull or elongate the waterstop during application. Always secure the waterstop in compliance with its original length (10 m per roll).

The products are produced with the best row materials available on the market in order to obtain a high quality product. Our guarantee covers the quality of the product but not its applications which cannot be under our control..


Mibo S.r.l. - Head and Operative offices: Via Chiavegoni, 11 - 36040 Brendola (VI) Italy
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