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Waterproofing Chemicals

LW Power

Integral liquid waterproofing compound for concrete & plaster

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Dubond's Hydrobuild LW Power is specially formulated integral liquid waterproofing compound composed of surface active plasticising agents, polymers & additives. It is used as an additive for cement concrete, mortar & plasters. It makes concrete cohesive and prevents segregation.

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Areas of Application

Waterproofing of concrete and sand-cement mortars used in ...


Roof slabs and screeds

Water tanks & water retaining structures

External plastering

Bathrooms and balconies

Sumps and drains

Features & Benefits

Corrosion Resistant - Makes concrete more cohesive, hence protects steel better against corrosion

Compatibility - Being a liquid, easily dispersible & compatible with concrete/mortar mixes

Permeability - It reduces the permeability of water into concrete

Strength - The setting time and compressive strength of the concrete remains within the specification limits

Shrinkage - Reduces shrinkage crack development in plaster & concrete

Workability - Improves workability of freshly mixed cement concrete

Durability - Increases durability by improving waterproofing of concrete

Method of Application

Surface penetration is most important step before application to get best results and avoid failure

Charge cement & aggregates to concrete mixer as per the mix design, mix in dry state for 1–2 minutes

Start addition of 75–80% mixing water & mix for 2-3 minutes

Hydrobuild LW Power is added as per the recommended dosage into the remaining mixing / gauging water, then add to concrete mixer & mix for another 2 minutes

Place the concrete or apply plaster, as needed

Cure the applied mortar or concrete as per good construction practices


  • Hydro lastik is applied with a fibre type brush or by trowel when a smooth finish is required. For large areas Hydro Lastik can also be sprayed, being the recommended nozzle size 3-4 mm and spraying pressure between 3.5 and 5.0 bar. When sprayed, it is recommended to finish the fresh coat with a trowel to make sure that the whole surface is covered completely
  • Apply two coats, using 1 – 1.5 kg/m² Hydro lastik per coat and allow a minimum of 16 hours and a maximum of 3 days between applications. Prior to application thoroughly wash down and saturate the surface, but do not leave free standing water. Thickness per layer should be 1 mm approximately, thereby being important to avoid very thin application or, on the opposite, a much thicker one. In those areas such as fissures, concrete joints and active cracks, once repaired and sealed
  • Place the mesh on a first coat of Hydro lastik with at least 20 cm wide of strip, and then apply a second coat of Hydro Lastik
  • Application conditions Optimum application temperature is between 10˚C to 25˚C. Do not apply below 5˚C or if lower temperatures are expected within the following 24 hours after application. Do not apply on frozen surfaces or if rain is expected 24 hours after application. Protect against quick drying by winds and direct sunlight with high temperatures, by fog spraying with water for two hours after application
  • Curing time required to put the product into service or to immerse it in water will depend on temperature and relative humidity conditions on site. Conditions in the range of 20˚C and 50% R.H will require a minimum of 14 days to ensure that the product has cured enough to be in permanent contact with water. Applications made at lower temperatures or sites without ventilation will require longer curing periods. After curing, wash the surface of Hydro Lastik with water before putting into service in permanent contact with water

Technical Information

Properties Specification  Result
Appearance Free flowing liquid
Colour Wine red
Sp. gr. @ 250C 1.05 - 1.070
Non volatile content 13.5 - 14.5%
pH value 9 – 13
Setting time, minutes IS : 2645 : 2003 Passes
Chloride Content IS : 2645 : 2003 Max. 2.00%
Water Permeability IS : 2645 : 2003 Passes
Compressive Strength N /mm² IS : 2645 : 2003 As per the standard

Other Information

Precautions & Limitations

  • Do not add Dubond's LW power directly to dry cement & aggregate mix
  • Maintain water-cement ratio as low as possible
  • Do not increase the dosage of Hydrobuild LW Power than the recommendation


200 ml per 50 kg bag of cement.


200 ml, 1, 5, 10, 20 & 100 ltr.


Best before 2 years from the date manufacture when in sealed pack and stored under proper condition. Store in a cool & dry place.

Health & Safety Precautions

  • Use rubber hand gloves & safety goggles, while using Hydrobuild LW Power
  • In case of contact with skin, wash with plenty of water
  • Keep out of reach of children

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