Salt Retarder



Salt retarder is a water repellent admixture which inhibits the permeation of salts and water when added to cement/sand renders. Salt retarder is a 3 in 1 admixture which provides water and salt resistance to cement/sand render and plasticises the render mix. Using Salt retarder in cement/sand render mix eliminates the need for separate plasticisers and water-proof additives.

Recommended Uses:

Salt retarder is recommended as a water repellent admixture for a cement/sand render specifically after the installation of a silicone damp course to prevent residual salt and water migration. It may also be used on a new wall to provide water/salt-resistance to cement/sand render. Salt retarder can also be used as a water repellent admixture for cement/sand mortars. Some of the important features of Salt retarder include:

  • Non-toxic water-based formulation.
  • Improves workability of cement/sand renders.
  • Increase adhesion of cement/sand renders.
  • Reduces water penetration, efflorescence and water-borne staining.
  • Does not significantly change vapour permeability of cement/sand renders.
  • Easy to use and cost effective.

As cement/sand renders vary significantly, a test MUST be carried out prior to application to find out the suitability of this product for the purpose.

Use Instructions:

Please read the product information for the correct application and safe handling before use.

For maximum effectiveness the cement to sand ratio should be 1 to 3. Other cement to sand ratio may be used, however, the performance of Salt retarder may be affected. Therefore, trials must be conducted to determine the best cement to sand ratio to suit the individual application.

Lime, plasticiser or other admixtures may be added but is NOT recommended. Applicators must perform trials on a small scale before application to determine the best render ingredients in the render mix containing Salt retarder to suit their individual applications.

If a typical mix contains 40Kg of cement and 120 kg of sand, the procedure is: Measure out 1 litre of Salt retarder and dissolve it in 20 litres of clean water. Blend the cement/sand render mix while adding this Salt retarder solution. Add clean water if required to attain the desired consistency.

Dosage rate

1 litre of Salt retarder per 40kg of cement is recommended for a general cement/sand render mix. However, as masonry materials vary, dosage rate may vary significantly from 0.75 to 1.5 litres per 40kg of cement. The applicator should carry out trials to determine the best dosage rate for their particular application.

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