Weber Saint-Gobain - Official website of the company

weber Plaster-Mix

weber Plaster-Mix

weber Plaster-Mix
weber Plaster-Mix

Product benefits

  • Suitable for all brick walls (cement and clay).
  • Convenient: Buy only that required to plaster area.
  • Interior and exterior application.
  • Can be applied up to 20 mm thick.
  • Can be used on a wide-range of surfaces

Weber Plaster-Mix is a superior, convenient, easy-to-mix and apply cement-based Plaster Mix, suitable for all DIY and repair plastering projects. Produced from carefully selected raw materials for consistency of product, it only requires the addition of water on site.

Product Features


Weber Plaster-Mix is suitable for plastering walls of all sizes.

  • Suitable for interior and exterior use
  • Suitable for use on walls

Features and Benefits

  • Ingredients: Washed Sand, quality cement (32.5 MPa), appropriate and necessary polymers to aid flow and adhesion to wall.
  • Suitable for all brick walls (cement and clay).
  • Mixing: Only needs the addition of 3-litres of clean water.
  • Coverage: Contents will enable 1m² to be plastered at 11 mm thick.
  • Convenient: Buy only that required to plaster area.
  • Tools required: Spade, Trowel, Wood/Aluminium Straight-Edge, Wheelbarrow or Bucket and Float.
  • Interior and exterior application.
  • Can be applied up to 20 mm thick.
  • Can be used on a wide-range of surfaces

Technical Data

  • Initial setting time: approximately 12 hours
  • Final setting time: approximately 24 hours
  • Pot life: approximately 2 hours
  • Water demand: approximately 3-litres per 20 kg
  • Temperature resistance: 70ºC
  • Application temperatures: Do not apply in temperatures below 5ºC or above 30ºC


We agree that Weber products meet the product specifications and will be free from any defect. Any guarantee with regard to the performance of Weber products will be subject to its professional and practical application of Weber products in accordance with our instructions and specifications.

However, we have no influence over specific site conditions and therefore, if in doubt, the user should first carry out sufficient tests to ensure that the product is suitable. In special cases, obtain advice. Should our product prove defective, we undertake to replace any defective material. This guarantee will fall away in the event of Weber products being contaminated by the addition of sand, cement or substance other than recommended by us.

Storage and shelf life

When stored, unopened in a dry place at temperatures above 5ºC, shelf life is 9 months from date of manufacture.


Send or download the documentation

You can either send the documentation to an email address, or download it.

Preparation & Application

Surface preparation

The following minimum curing periods should be observed before plastering commences:

  • New brick walls: 28 days

Ensure that all surfaces are clean, dry, sound and free from dust, grease or any contamination that could impair bonding. Make good any unsound areas and remove flaky or peeling layers before plastering. PVA paint and gypsum plaster must be chipped to expose 80% of the substrate. Enamel paint and bitumen should be scraped and chipped to expose 80% of the substrate.


  • Combine a 20 kg bag of Weber Plaster-Mix with 3-litre of clean water and stir until completely free of lumps.
  • Allow the mixture to mature for 5-minutes and re-mix thoroughly. The consistency can be adjusted by adding a small amount of water.
  • Do not mix more than can be applied within 2 hours.


  • Ensure that wall to be plastered is free of contaminants, loose material and dirt.
  • Mask off and protect surfaces that are not to be plastered.
  • For best results wet area to be bricked/plastered using a block brush and water.
  • Mix contents of bag with 3-litres of water, and allow to stand for 5-10 minutes before applying.
  • Using a plaster trowel apply Weber Plaster-Mix to wall and spread as evenly.
  • Using a Straight-Edge, level the plaster to suit.


Depending on the nature and evenness of the surface and method of application, approximately 1m² per 20 kg bag when applied 11 mm thick.

Packaging, Health & Safety


Weber Plaster-Mix is supplied in 20 kg bags.

Safety Instructions

Contains cement, which is alkaline when wet and can cause skin irritation. Use eye protection and gloves and avoid prolonged skin contact. Avoid inhalation of dust. Wash skin contamination away with warm soapy water. Remove splashes to the eyes by prolonged irrigation and consult a doctor. Do not ingest.