Product Data Sheet Show all documents
Feb® Rendamix

Feb® Rendamix

a water resisting, retarding and plasticising admixture.

Feb® Rendamix is a water resisting, retarding and plasticising admixture for use in sand: cement rendering mortars.  The product also acts as an inhibitor for efflorescence.

  • The utilisation of Feb® Rendamix air entraining and retarding properties allows larger working areas to be covered in a single application process.
  • Significant improvement in resistance to water penetration.
  • Significant reduction in water demand of a given mix, resulting in reduction in water bleed both on the ‘spot board’ and in situ.
  • Improved durability.
  • Inhibits transmission of hygroscopic salts.
  • Enhances insulation properties.
Freezing Point (°C)  -3 Water Absorption (dosage750ml/50kg cem) 5% compared to 15% for a standard 4:1 sand/cement mix Set time 100% longer than control.
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Product Data Sheet Show all documents

Usage

As an admixture to exterior or above ground cementitious render finishes such as dashing, harling, rough cast and internally after installation of injection DPC’s.  

Advantages

  • The utilisation of Feb® Rendamix air entraining and retarding properties allows larger working areas to be covered in a single application process.
  • Significant improvement in resistance to water penetration.
  • Significant reduction in water demand of a given mix, resulting in reduction in water bleed both on the ‘spot board’ and in situ.
  • Improved durability.
  • Inhibits transmission of hygroscopic salts.
  • Enhances insulation properties.
Freezing Point (°C)  -3 Water Absorption (dosage750ml/50kg cem) 5% compared to 15% for a standard 4:1 sand/cement mix Set time 100% longer than control.

Packaging

5ltr jerry

Colour

Yellow viscous liquid / gel

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Conforms to BS EN 934-3:2009 for air entraining properties.
Product Information

Shelf Life

2 years from date of manufacture.

Storage Conditions

Store between 5 and 25 ºC and protect from frost. Stir before use.

Density

1.01 - 1.05 g/cm3

pH-Value

10.7 - 12.7

Conventional Dry Material Content

9 - 11%

Total Chloride Ion Content

< 0.1% (w/w)

Application

Application steps

MIXING

Selection of materials and correct mix designs relative to substrate and exposure levels are of paramount importance. Selection of materials and application of the external render systems should be in line with BS 5262 1991, Code of Practice for External Render and BS8000 Part 10:1995 Code of Practice for Plastering and Rendering.

NB: Types of finish requiring strong mix designs should not be considered for weak backgrounds.

In seaside or marine environments where soluble salts in the background may be present sulphate resisting cement should be used as an alternative to OPC.

Addition

Feb® Rendamix is supplied ready to use and should be added to the mixing water at a rate of one part Feb® Rendamix to 20/40 parts water. This corresponds to a dosage rate of 500 ml to 1000 ml per 50 kg of cement. The plasticising action of Feb® Rendamix should be used to full effect by reducing the water/cement ratio; a reduction in water content up to approximately 20% is achievable compared to an unplasticised mix.

Care should be taken not to overmix.

Dosage

500 ml to 1000 ml per 50 kg kilos of cement.

Documents