Waterproof polymer bonding aid and mortar additive

Cempatch SBR is a pure polymer emulsion, designed to improve the mechanical and waterproofing properties of sand/cement based screeds, mortars and renders. The addition of Cempatch SBR has a strong plasticising effect, thereby allowing a reduction in the water/cement ratio, further improving the flexural, tensile and compressive strength and enabling screeds to be applied down to 10 mm and renders down to 6 mm. 

The addition of Cempatch SBR will also significantly increase resistance to chemical attack, abrasion and freeze-thaw cycling.


Cempatch SBR is available in 25 and 200 litre containers.

Consumption/Dosage Rate

Typically 10 - 20% v/w on the OPC weight i.e. 5-10 litre of Cempatch SBR per 50 kg of OPC.


Protect from frost and store under dry warehouse conditions at a temperature between 10°C and 30°C. 

Shelf Life

Cempatch SBR has a shelf life of 12 months in unopened containers and stored under good conditions.


  • As a bonding agent for bonding new concrete to old.
  • Patch repair compounds.
  • Industrial floors and screeds.
  • Water-resistant renders and screeds.
  • Lining effluent tanks.

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Don Construction Products Ltd.

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Hawthorn House;
Helions Bumpstead Road, Haverhill CB9 7AA, United Kingdom;
Tel: +44 1 4407 66360 
Fax: +44 1 4407 68897

Email: info@donconstruction.co.uk
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