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ArgiLolla MGN

Lime Plaster with Clay & Rice Husk Bio-plaster
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ArgiLolla MGN - Description

ArgiLolla MGN is a premixed mortar based on very high-purity air lime (over 90% calcium hydroxide), a small percentage of natural white hydraulic lime, washed river sands without impurities, clay and rice husk. 

Due to the extremely high-quality raw materials it is suitable for bio/green buildings, for internal application only.

Here are some of the benefits of the clay based plasters:

  • Antistatic: the addition of clay to the plaster slows down the degradation and breakdown of plaster, reducing the risk of dust inhalation, contributing to the prevention of respiratory diseases such as asthma and allergies.
  • Odour absorber: clay being a colloid (mix of insoluble particles), it can greatly reduce dust, gas and odours present in the air, keeping the environment clean and healthy.
  • Humidity regulator: it absorbs water from the air when it is too damp, and exhales it when the air is too dry. This way the relative humidity is maintained in optimal conditions between 50% and 70%.
  • Thermal regulator: it has good thermal inertia so it keeps temperature of the rooms stable.
  • Sound absorber: it has excellent sound-absorbing properties, especially in large rooms, where under normal conditions rumbles and unpleasant sounds could occur. Clay plaster absorbs low-frequency sounds, thus improving living comfort.
  • Electrosmog absorber: according to a study by prof. Schneider of Moncao di Baviera, 2.5 cm of clay plaster removes 75% of the radiation developed by a high voltage system. A wall built with normal raw clay bricks can eliminate up to 98%.
  • Versatile: Thanks to the many properties of raw clay, it can be used in any type of construction, old or new.
  • Fire resistant: clay makes the fibrous aggregates of natural origin (e.g. straw) fireproof.

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.  
Excellent Humidity Regulator
Can effectively buffer humidity variations, maintaining low internal humidity, preventing condensation.

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
  • Clay: selected clay of highest quality
  • Natural rice husk: from Italian bio-farming rice fields
  • Natural river sands: washed river sands, free of salts and impurities, certified according to EN 13139 standard

Technical Data

Granulation (mm)
0-4
Vapour diffusion resistance (μ)
5.9
Declared thermal conductivity - λ (D)
0.50
Water absorption
W0 to W2
pH
10.5
Adhesion (N / mm²)
0.1
Compressive strength (N / mm²)
1.5
Bulk density (kg / m³)
950
Bag weight (kg)
20
Water intake (litre / bag)
5
Consumption (kg / m² / cm)
9
Application temperature (°C)
5-30
Fire rating
A2
Chloride content (%)
None
Harmful substances
None
Colour
Beige / Ivory
Recommended thickness (mm)
20

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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Main

[20 mm] Clay rice husk second coat, applied in a single coat.

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.

  • Clean the masonry: the plaster must be applied on a cleaned and uniformly wet substrate. All crumbling and loose parts must be removed by brushing so the masonry is free of dust, salts and oils. If possible, also wash the walls with a pressure washer; this will clean and wet the walls in one go. Close larger holes with lime mortar and pieces of bricks.
  • 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.
  • Wet the wall fabric abundantly before applying the plaster, as well as in-between each subsequent coat. Lime plasters need moisture as they set slowly in a damp environment. If the walls are already damp, there is no need to wait to become drier, you can proceed with the application of this plaster. 
  • Application: apply the plaster in 10 mm coats.
  • Recommended thickness: the recommended application thickness is about 20 mm.
  • Finish options: main lime coats can be optionally left without finishing. To have a finished surface any MGN finish can be applied: Calcina Fine MGN (white lime finish), Intonachino Arenino MGN (coloured lime finish) or Marmorino MGN (Venetian Marmorino finish).
  • 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).

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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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. 

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.