Why choose NHL from Saint Astier®?

Saint-Astier® natural hydraulic lime is produced from a limestone that is unique in Europe and has exceptional mineralogical properties which have remained unchanged since extraction began at the underground quarry.

Pure raw materials

No additives are used in the production of Saint-Astier® natural hydraulic limes.

Dual setting

Saint-Astier® limes are both hydraulic (setting on contact with water) and carbonating (hardening on contact with air).

No additives required

The Saint-Astier® range of natural hydraulic limes allows you to choose the lime best suited to your work, with no added cement, plasticisers, water-retaining agents, water repellents, etc.

Compatibility and suitability

The wide range of Saint-Astier® limes with guaranteed properties offers the best compatibility of mortars with existing substrates, regardless of their age.

Contains free lime Ca(OH)2

Free lime gives lime-based mortars their flexibility and the ability to self-heal micro-cracks.

Versatile applications

Masonry and plastering mortars, grouting, injections, lime mortars, mixing with hemp or flax, and limewashes are all possible with Saint-Astier® natural hydraulic limes.

Good water vapour permeability

The good vapour permeability of Saint-Astier® limes allows moisture exchange between inside and outside, thereby reducing the risk of mould and contributing to a balanced indoor climate and greater room comfort.

Resistant to sulphates and salts

The absence of any additives such as gypsum or cement makes expansion due to sulphates and alkali reactions impossible. Salts present in the existing structure can migrate and eventually be removed. Saint-Astier® limes are excellently suited for use in marine environments.