Integral Waterproofing Liquid Admixture for Concrete and Mortar

BESTBUILD THAR is an integral waterproofing liquid admixture that minimises the water-permeability and increases the waterproofing properties of concrete and sand-cement mortars. It also reduces the water-demand and improves the cohesiveness, workability, and durability of concrete and plaster mixes.

  • Minimises Water Permeability: Reduces the permeability of water in concrete and mortar.
  • Reduced Water Demand: Reduces the water requirement in the mix design and makes the mix more cohesive.
  • Improves Workability: Improves compaction of concrete and mortar.
  • Improves Concrete Quality: Minimizes porosity and honeycombing, and produces denser concrete.
  • Reduced Shrinkage: Reduces development of shrinkage cracks in concrete and mortar.
  • Corrosion Resistant: No added chloride, hence does not attack re-bars.
  • Compatibility: Can be used with all types & grades of cements, except high alumina cement.
Standards Compliance

BESTBUILD THAR conforms to IS:2645-2003 and IS:9103-2000.


Available in 500 ml, 1 litre, 5 litre, 10 litre and 20 litre containers.

  • BESTBUILD THAR can be used in basements, roof slabs & screeds, external plastering, bathroom floors, water tanks, sumps, drains, etc.
  • 1. Charge the cement and sand/aggregate to the mixer and mix the dry materials for two minutes.
  • 2. Reduce approximately 15% water in the mix design to ensure no loss in strength.
  • 3. Add 75% of mixing water to the mixer and mix for two minutes.
  • 4. Add the measured quantity of BESTBUILD THAR to the remaining water and stir it well.
  • 5. Add the THAR-water mixture to the mixer and mix thoroughly to completion.
  • 6. Once the application is complete, cure the concrete/mortar as per the standard practice of water curing.
Dosage Use 125 ml of BESTBUILD Thar for every 50 kg bag of cement.
  • 1. Mixes using BESTBUILD THAR will require lesser water than normal mixes for the same workability. Therefore, water addition should be reduced up to 15% or more. The exact percentage should be determined at site after trials.
  • 2. Do not add BESTBUILD THAR directly to dry cement and sand/aggregate.
  • 3. If BESTBUILD THAR is added more than the recommend dosage, it may affect the cohesiveness, initial and final setting time of the concrete/mortar.
Shelf Life & Storage Shelf life is 12 months from the date of manufacturing, if stored in unopened original packaging. Store in cool & dry place, away from direct sun light.