Quick Links - Click To Jump To Section:

   
• Features & Benefits
• Equipment
• Substrate Quality/Pre-treatment
• Substrate Preparation
• Application
• Limitations

Features & Benefits

• External render for application onto vertical masonry and concrete walls
• Bright white one-coat finish
• Only suitable for strong dense substrates
• Fine-scraped, float smoothed or trowel smoothed textures
• Conforms to EN998-1

Equipment

Substrate Quality/Pre-Treatment

Suitable Substrates:

• Dense aggregate concrete blocks
• Dense bricks*
• Breeze blocks (clinker)
• Stone/rubble stone
• Shuttered concrete*
• Clean, sound, well adhered existing render
• Base coats conforming to BS EN 13914-1
• Parex grey weather resistant base coats, e.g. Parmurex or Tradirex
• Below dpc applications and old substrates in accordance with BS8000 - 4 Code of Practice for Waterproofing

*These substrates will require a suction control coat of Microgobetis 3000

Unsuitable for:

• Ultra-lightweight & lightweight aggregate concrete blocks, clay blocks, standard low and normal density lightweight aircrete blocks
• Dry stacked inter-locking modular wall units e.g. Durisol, Velox etc
• Weak mortar or plaster (Gypsum) coated constructions
• Exposed vertical substrates with a backward incline above 10 ° - a backward incline may affect water run off and may have a tendency to hold moisture

Substrate Preparation

• Substrates must be clean, sound, dust-free and free of any material which may prevent adhesion
• Remove all traces of plaster, paint, etc
• Construction of the masonry must comply with BS 8000-3
• On low suction substrates e.g. shuttered concrete or high suction substrates e.g. lightweight aircrete or clay blockwork, first apply a coat of ready-to use Microgobetis 3000 or a Blanc Du Littoral keycoat made up by adding 0.5 L of 751 Lankolatex to the mixing water volume for a 25 kg bag of Blanc Du Littoral
• On wet or wet patchy substrates or where different materials have been used it is advisable to apply a key coat made up by exchanging 0.5 L of water for 0.5 L of 751 Lankolatex or Fixopierre for the mixing volume for a 25 kg bag of Blanc Du Littoral. Allow the key coat to fully dry a minimum of 48 hours before the application of the next coat. This suggestion will assist against the effect of ‘block ghosting’ and shade variation
• TV10 Mesh may also be required, dependent upon substrate condition and project specification
• Due to shrinkage differentials, avoid applying a thin base coat and a thicker top coat application as the shrinkage values of a thicker top coat could cause the render to delaminate from the base coat. The same effect is also caused by applying a very hard render over a softer base coat
• To avoid shade variations always apply and finish the render application to whole elevations at the same time

Application

For Weather Proofing Applications onto Concrete, Concrete Blocks, Bricks

Scraped Finish

• Apply a level, ruled compact 18 mm thick coat, level the surface with a straight edge, spatula or trowel flat. Allow to dry (3-16 hours) and depending on the substrate and drying conditions, scrape the surface in small circular motions using a scraping tool, removing no more than 3 mm from the surface
• This scraping process must remove any slight imperfections and bring the application to the specified finished thickness. Each elevation must be scraped at the same stage, as early scraping will result in a slightly darker shade and later scraping in a lighter shade.The minimum finished thickness after scraping is 15 mm
• After scraping, any dust on the surface should be removed by brushing with a clean soft bristle brush. Always stand back and examine the whole surface for blemishes and unevenness. Errors must be corrected at this stage as rectification later is not practical

Sponge/Float/Trowel Finishes

• For ease of application and finish, avoid using Axel 3000, Algirex or 751 Lankolatex in the top coat application of the trowel, float or sponge smooth finish
• Apply a level, compact, minimum 15 mm thick coat in 1 or 2 coats. Obtain the finish with a stainless steel floating trowel, wooden, sponge or plastic float

Due to construction variations, the minimum thickness must not be less than 15 mm after the Scraped, Float Smoothed or Trowel/Sponge Smoothed finishes.

It is recommended that a minimum depth of render to the back of the rustification/ashlar cut should be no less than 15mm. To achieve this depth will require the finished thickness of the main render to be increased to approximately 20 - 25 mm.

For Decorating Waterproof Concrete & Masonry Substrates i.e. Covered with an Existing Sound & Weatherproof Render

Scraped Finish

• Apply a level, ruled compact 13 mm thick coat, level the surface with a straight edge, spatula or trowel flat. Allow to dry (3-16) hours and depending on the substrate and drying conditions, scrape the surface in small circular motions using a scraping tool, removing no more than 3 mm from the surface. Then follow the same procedure detailed above

Sponge/Float/Trowel Finishes

• Apply a level, compact, minimum 10 mm thick coat. Obtain the finish with a stainless steel floating trowel, wooden, sponge or plastic float

Limitations

• Product intended for professional use. It is advisable when completing the different finishes, to take into account the hardening time, which will vary according to climatic conditions
• Avoid applications on substrates exposed to direct sun or in hot drying winds
• Do not apply on over heated substrates. In hot condition dampen the substrate prior to application. Dampen the render after application
• Do not apply to a frozen substrate or on thawing substrates. Do not use in freezing conditions. Take precautions during damp climatic conditions (Discolouration could occur)
• Do not apply on very wet substrates or where there are wet patches. (Discolouration could occur)
• Minimum application temperatures: +5 °C for light colours, +8 °C for dark colours
• Over 30 °C, special precautions must be taken. In order to reduce the risk of colour differences after drying, always use the same batch number for the same façade