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Weber.rend aid is a polymer modified cement and sand mix. The powder blend includes an integral bonding agent so that it requires only the addition of clean water on site
  • To achieve a good key for rendering onto smooth or otherwise unsuitable but sound surfaces
  • Ideal as a pre-treatment for renderings required to resist severe exposure conditions
  • Equalises suction on mixed backgrounds
  • Provides excellent suction control across both high and low suction substrates
  • Resists the penetration of external water to improve the weather resistance of rendering systems
  • Quality controlled and factory blended to give a consistently high quality product
  • Apply with a hawk and trowel or an open hopper spray gun, apply a tight layer 2 - 3 mm thick to the substrate. Texture the surface using a well loaded roller
  • Suitable substrates: dense concrete brickwork blockwork masonry clean, sound, well adhered existing render (<19mm)

Technical specification

25 kg
For each mm of thickness, you will require approximately 1.4 kg per m2. When trowel applied to a thickness of 2 - 3 mm, coverage is approximately 7.5 m2 per 25 kg bag.
Time to Set
Cure for 2 - 3 days
Pre Render
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per bag (Inc. VAT)
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