Thermal smoothing lime-based plaster to be used in combination with the cork-based thermal renders, to improve the general insulation of the system. Ecological material made of natural raw materials and aggregates.


1.2 kg/m²

± 10%. Value referred to a 1 mm thickness.
3.6 kg/m± 10% for 3 mm of thickness on Diathonite plasters

Drying time


With 20°C/68°F of temperature and 50% of relative humidity.



Colors shown are for illustrative purpose.


25 kg paper bag

Agratherm is a lime-based smoother skim coat to be used as a finishing plaster over Diathonite renders: it is enriched with special fibers and aggregates which contributes to improve its thermal properties, ensuring a total thermal system when used is combination with Diathonite thermal and dehumidification plasters.

Furthermore, thanks to its granulometry size, Argatherm is a perfect smoother to obtain a typical textuted look, without adding too much weight to the system, as it is a lightweight material. 

The material is composed by natural hydraulic lime, hydrated lime, micro-fibers and special thermal fillers, that is why it owns a certified thermal conductivity value of 0,128 W/mK.

Argatherm is suitable for indoor and outdoor applications, for internal walls, façades, ceilings and it can be easily applied by trowel and plastering machines.

Key benefits

  • Very good thermal properties: it improves the general thermal insulation of the system
  • Composed and formulated by natural raw materials, harmless for the environment and for human health
  • Reinforced by ecological and non-toxic fibers
  • It avoids mould and condensation
  • Lightweight material
  • It ensures fine textured aspect


Aspect: Powder

Components: One-component

Thermal conductivity: λ = 0.128 W/mK (category T2)   

Breathability: µ ≤ 15

Fire reaction: class A1

Compression Resistance at 28 days  15 (Class R2)

Item Specifications

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