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Rasante B2007 MGN

Water Repellent Lime Finish for External Renders
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Rasante B2007 MGN - Description

Rasante B-2007 MGN it is an air lime based levelling / finishing plaster. Containing a non-chemical natural water-repellent (hydrophobic) ingredient, it protects the plastering from wind driven rain and the effects of bad weather while at the same time guarantees the natural breathability of the wall fabric. 

When applied as a lime finish on external thermal rendering, it sheds the rainwater, protecting the lime render from becoming soaked by rain, allowing it to stay dry, retaining its thermal performance.

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
  • Water repellent of natural (non-chemical) origin

Technical Data

Granulation (mm)
0-1
Vapour diffusion resistance (μ)
11
Declared thermal conductivity - λ (D)
0.53
Water absorption
W0
pH
10.5
Adhesion (N / mm²)
0.6
Compressive strength (N / mm²)
CS II
Bulk density (kg / m³)
1500
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)
  • Green 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.

Work Specifications & Application

Here are the recommended work specifications for this plaster.

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Finishing

[4 mm] Lime finish applied as:

  • â–ˆ [2 mm] First half of the finish.
  • â–’ [Mesh] Fibreglass fine mesh (4 x 4 mm): embed a mesh into the finish for added flexibility.
  • â–ˆ [2 mm] Second half of the finish.

Application Instructions

Here are some key technical points about how to apply this material correctly. Please have your plasterer read / watch the application instructions before applying the product. If any questions, please contact us, happy to help.

  • 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. 
  • IMPORTANT: Dry to wet mixing: plasters with hydraulic ingredients should always be mixed from dry to wet (workable) state. Add your powder to a bit of water, start mixing and gradually add more water till the right consistency is reached. This is the right way. Mixing the other way – wet to dry mixing – by starting with lots of water then gradually adding powder to the right consistency, is incorrect. Reason: excessive wetting weakens the plaster, alters its hydraulic set resulting in less performant, more friable and shorter lasting plasters.
  • 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

Here are some key technical documents (spec sheets, application guide etc.) about this plaster.

Technical Sheet
Decl. of Performance

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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Completed Projects

Here are some of our projects using this plaster:

Solutions

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

Photo Galleries

Here are some photos demonstrating this solution. Click on any image to open the photo gallery.

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Similar Category 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.Â