CALCITERM MGN is a traditional, dry premixed insulating mortar based on natural hydraulic lime and perlite aggregates. It can be applied wherever thermal insulation, the elimination of cold bridging and/or interstitial condensation is desired.
Perlite is a volcanic mineral that expands up to 13 times its former size when heated (much like popcorn), resulting in an incredibly lightweight, “fluffy” plaster.
Due to the expanded lightweight perlite, CALCITERM plaster has very good thermal insulation properties while being much lighter - about 1/5th of the weight - of traditional plasters).
Up to 40 mm can be applied in one layer without putting excessive strain onto the existing structure.
Here is some key technical data. Please see technical sheet below for more information.
1 - 5 mm
Vapour diffusion resistance (μ)
Thermal conductivity (λ)
Weight (kg / m³)
Consumption (kg / m² area / cm thickness)
Bag weight (kg)
- Hydrated lime, with more than 90% calcium hydroxide
- NHL3.5 Natural hydraulic lime, desalinated white
- Natural perlite
- Natural plasticisers