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Rasante B40 MGN

Levelling-Finishing Lime Plaster
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Rasante B40 MGN - Description

RASANTE B40 MGN is a lime levelling plaster suitable for levelling uneven or mixed substrates.

Due to its high adhesion, high elasticity and excellent workability, it can be used for multiple purposes:

  • Levelling or smoothing plaster for mixed surfaces: it can be applied on top of uneven, cracked or mixed surfaces surfaces, (e.g. a mix of cement, lime, natural hydraulic lime (NHL) surfaces), dating from different time periods. It is also used on lime floors as a levelling coat under the finish. 
  • Bridging plaster: it can be used on concrete surfaces (e.g. concrete slabs, beams, ceilings etc.), acting as a bridging plaster between concrete and lime – in case a lime finish needs to be applied on a cementitious surface.
  • Protective-decorative finish for thermal plasters: it can be used as finish for thermal insulation plasters, providing a better mechanical protection than general-purpose lime plasters.

Key Features

Here are some key features of this product.
Breathable
Being a lime plaster, it's naturally vapour permeable or breathable.
No Cement. No Chemicals
This plaster does not contain chemicals or cement - it only contains natural materials.
Suitable for Listed buildings
This plaster is suitable for historic or listed buildings and heritage renovations.  

Composition

  • Natural air lime: highest purity lime containing min 90% CaO, classified as CL90S according to EN-459-1 standard
  • Natural hydraulic lime NHL 3.5, certified according to EN-459-1 standard
  • Natural river sands: washed river sands, free of salts and impurities, certified according to EN 13139 standard
  • Natural plasticisers: of food / plant origin to improve workability

Specifications

Granulation (mm)
0-1
Vapour diffusion resistance (μ)
11
Declared thermal conductivity - λ (D)
0.59
Water absorption
W0
pH
10.7
Adhesion (N / mm²)
0.2
Compressive strength (N / mm²)
CS II
Bulk density (kg / m³)
1570
Bag weight (kg)
25
Water intake (litre / bag)
5
Consumption (kg / m² / cm)
10
Application temperature (°C)
5-30
Fire rating
A1
Chloride content (%)
None
Harmful substances
None
Colour
White
Recommended thickness (mm)
3-4

Certifications

  • UNI EN 998-1:2016 – Certified General Purpose Plaster for Internal / External Use (GP)
  • Minimum Environmental Criteria (CAM) Declaration: a “green purchase” environmental declaration, indicating that this product satisfies the environmental requirements of the Italian Government, representing the best ecological solution for a project when taking into account the entire life cycle of a product from manufacturing to disposal.
  • CE Marking: this product complies with all relevant European Union regulations, meeting all performance requirements required by the CE marking.

Completed Projects

Here are some of our projects using this plaster:

Solutions

This material can be used in the following applications or solutions:

Videos

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Similar Products

Here are some other similar products of the same category (e.g. other main coats or finishes). Depending on your application, you could use these as alternative products. 

Product Combinations

Although all MGN plasters can be used on their own, in many applications they perform best when certain materials are applied together as a plastering system complementing and reinforcing each other.

Here are some other plasters which are recommended to be used with this one.

Any Questions? Need Technical Advice?

If you have any questions about a project, a problem, a solution, or any of our plasters - please get in touch.

We understand that each project is unique. Using the contact form below feel free to ask us any question. Give us as much detail as you can about your project so we can get back to you with more relevant answers. 

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Application

Here are some key technical points about how to apply this material correctly:

b40-main-core-conservation

Finishing

  • Mixing: mix the material with clean tap water only without adding anything else (no other material or additive), until a homogenous, creamy-consistency mix is obtained. 
  • Recommended thickness of the finish: 3-4 mm. For best results, the finish should be applied in two “half-coats” of 2 mm each, with a fine 3-4 mm fibreglass mesh embedded in-between. The mesh makes the finish more flexible, minimizing the appearance of fine cracks.
  • Various textured finishes can be achieved, depending on the finishing technique used:
    • Coarse finish: by finishing the surface with a sponge or wooden trowel.
    • Smooth finish: by using a stainless steel trowel, compressing and smoothing the semi-dry surface, the sand granules are pushed into the material, resulting in a smooth finish.
    • Washed finish: by finishing the surface with a sponge trowel. After the surface has hardened, the surface is washed with water and blotted with a sponge to bring out the aggregate, its specific texture and colour.
  • Painting: as this is a breathable lime plaster, wall surfaces should be painted with a breathable mineral paint. Wallpapers and modern emulsion petrol-based paints, with no or limited breathability, should be avoided.
  • Application conditions: ambient and wall temperatures must be between +5 to +30°C during application. Surfaces should be protected from rain and humidity until they have completely dried (approx. 3 – 10 days depending on weather conditions).

Downloads

Technical Sheet
Safety Sheet