Ecorend MR1 Monocouche Render 25kg – Portland Stone

Supplied as a dry, cement-based render, MR1 is mixed with clean water and applied to a compatible, correctly prepared background. The material is built up in two passes as a single render coat, then scraped to create its characteristic textured finish.

The render is coloured throughout and formulated for water repellence, breathability and adhesion. This provides both the decorative finish and weather protection without requiring a separate painted topcoat.

Product details:

• Colour: Portland Stone
• Product type: Monocouche one-coat render
• Bag size: 25kg
• Finish: Scraped stone effect
• Application: Manual or spray
• Recommended finished thickness: 15mm
• Indicative consumption: 1.5kg per mm per m²
• Mixing water: Approximately 4.5–5 litres

Natural raw materials can cause slight differences between manufacturing batches. Use consistent batch numbers up to natural breaks in the elevation and obtain a sample before ordering material for the full project.

Ecorend confirms that all three are legitimate MR1 colours and that MR1 is a BBA-approved, through-coloured monocouche render with W2-class water repellence.

FINISHING TOOL
Scrape Float

SUBSTRATE PRIMER
S10 or K11 (Dependent on substrate)

SUITABLE SUBSTRATE
Concrete, Clay, Lightweight Block and Brick Pot Life 1 Hour + Water Demand Approx. 4.5 - 5 litres per 25kg bag Ready to Finish 3-16 hours @ 5˚C - 25˚C

PREPARATION
All surfaces must be sound, clean, dry and free of any material which may impair adhesion. Do not apply to shiny surfaces. Scaffolding must be independently tied to allow for uninterrupted application. Any faults in the structure, particularly those which may lead to moisture penetration, must be rectified. Mask around the areas where material is to be applied. Masking tape must be removed before the material has dried out. Beads and expansion joints should be included as required by the substrate and BS standards and carried through all applied materials.

PRIMING
When applying to concrete block, prime with Ecorend S10 Bonding Primer When applying to clay, lightweight block and brick, prime with Ecorend K11 Key Coat Primer

MIXING
Ecorend MR1 Monocouche One Coat Render should be mixed with clean water at a rate of approximately 4.5 - 5.0 litres per 25kg bag using a suitable paddle or pan mixer. Mix for 2 minutes, allow to stand for 2 minutes then re-mix. This process allows the additives to dissolve and activate.

APPLICATION
To avoid dampness and discolouration rendering should be avoided below DPC or within 150mm of ground level. Ecorend MR1 Monocouche One Coat Render should be applied in a one-coat 2 pass operation to 17mm and finished to 15mm thick. The 1st pass should be applied to the primed substrate with a stainless steel trowel or spray pump, and for ease of application a serrated feather edge and finishing spatula will help. Apply the 1st pass to approx. 8mm thick with fibre-reinforcing mesh included in the 1st pass ensuring that the mesh is overlapped 100mm at the mesh joints. Additional fibre-reinforcing mesh stress patches of 500 x 500 mm should be added at all openings i.e. windows and doors, and also window reveals for additional substrate stress protection. The 2nd pass should then be applied to approx. 9mm thick, wet on wet to the 1st pass and levelled flat. Then leave the render to harden but not fully set for between 3-16 hours dependent on the temperature. This will allow the surface to harden, ready to finish once you can imprint your nail but not your thumb print, at this point the render is ready to scrape. Scraping should take place using a scraping float, scrape the surface in a tight circular action. It is essential that this operation is done carefully and evenly, the objective is to only remove 2mm from the complete surface. During the operation of scraping the render, use a straight edge to ensure any high spots are evened out. Immediately following the scraping process (preferably use a second man for this process), use a light soft brush to remove all loose material. Carrying out this process may highlight any un-scraped areas. Un-scraped areas must be scraped immediately to avoid colour variation that will occur if scraped when the product has started to set. Small blemishes or holes can be repaired at this stage by using material freshly scraped from the wall and pointed in. Once the product is fully scraped the minimum finish thickness should be 15mm. Specification Clauses relating to this product can be found in NBS Section M20 Rendering. BS 5262 Code of Practice for External Rendering and BS 8000-10 must be followed.