weber.tec 930
Product formerly named: DEITERMANN DSMineral cement-based waterproofing coating for earth-contacting building parts and drinking water tanks
Colours:
grey
Application thickness:
depends on water load; see figures herebelow under “Consumption / yield”
Water demand:
min. 4.0 - max. 4.75 liters / 25 kg, depending on required consistency
Drying time:
approx. 3 days
Storage:
The product can be stored for at least 12 months in its original unopened packaging if kept dry.
Fields of application
weber.tec 930 is used for achieving mineral waterproofing of earth-contacting (below ground level) building parts, water tanks, drinking water tanks, and other building structures (above ground level).
Suitable for the external waterproofing of building structures against ground damp, non-pressure water and pressure water (positive pressure up to 1.5 bar).
For internal waterproofing of basements, walls and floors resisting to negative water pressure.
For use indoors and outdoors.
Main features
- waterproof against pressure water
- can also be used in case of negative water pressure
- particularly resistant to mechanical and aggressive loads
- resistant to sulphate-containing water in the soil up to the “highly corrosive” level (up to 3.000 mg sulphate per litre of water) in accordance with DIN 4030
- suitable for long-term contact with drinking water
- no efflorescence and no harmful influences on concrete and masonry
- quickly able to withstand water load
General notes
- Comply with the national standards and/or guidelines; if not issued and if necessary, refer to the “Guideline for Planning and Execution of Waterproofing of Structural Components with Mineral Waterproofing Slurries” and the WTA leaflet 4-6 “Retrospective Waterproofing of Ground-Contacting Structures” (WTA = International Association for Science and Technology of Building Maintenance and Monuments Preservation). In case of doubt request technical advice.
- All characteristics mentioned in this data sheet are based on a temperature of +23 °C, without draught and a relative humidity rate of 50%.
- The slurry should only be applied to building structures that are crack-free and sufficiently stable.
- In case of positive pressure water restrict its application to concrete surfaces only; their immersion depth should not exceed 3 meters.
- In the case of waterproofing water tanks (positive pressure) their water head should not exceed 15 meters.
- In case of internal waterproofing (negative water pressure) the immersion depth of the building structure should not exceed 3 meters; at the same time, a sufficient tensile (pull-off) strength of the substrate is required.
- The thickness of each layer should not exceed 3 mm at any point and the total thickness 5 mm.
- After application keep the waterproofing coat damp for at least 24 hours and protect from direct sunlight and freezing for an additional period of 5 days.
- Do not apply on frozen substrates or in frost conditions. Do not apply in rain.
- The waterproofing slurry can also be used as preliminary waterproofing for the 2-comp. reactive waterproofing slurry weber.tec Superflex D 2.
- If a render is planned on top of weber.tec 930, apply the quick-setting stipple coat weber.san 951 S full-surface as bonding layer on the fully dried dry waterproofing layer.
- When waterproofing water tanks containing very soft water with a hardness level ≤ 3° dH (German hardness), corrosion on cementitious waterproofing slurries should be anticipated. For service water tanks without sewage residues (for ex. fire water tanks) we recommend weber.tec Superflex D 2.
- weber.tec 930 resists to aggressive ground water (containing sulphates) according to DIN 4030 (see above). In case of doubt, request technical advice.
- Avoid any direct contact with non-ferrous metals, for ex. aluminium, zinc or copper, and apply a full-cover anti-corrosion paint.
Special notes
- In all cases (except for waterproofing drinking water tanks) the polymer dispersion as bonding resin weber.ad 785 can be added to weber.tec 930 to improve the fresh and dry mortar properties.
- weber.tec 930 can be blended with oven-dried silica sand for use as repair/patching mortar. In this case weber.tec 930 (unblended) is first used as bonding coat.
- For both cases refer to the explanations herebelow “Specific applications”.