natural hydraulic lime


  • Traditional European finish that stands the test of time.

  • Pure, natural hydraulic lime with no additives.

  • Rich, velvety texture for a naturally beautiful finish.

  • Breathable plaster that inhibits bacteria and mold growth.

  • Reabsorbs carbon during curing, reducing its environmental impact.

Pricing:
NHL 2 Plaster
NHL 3.5 Plaster
NHL 5 Plaster
Ecomortar F2
Ecomartar F3.5


$49.60 / 55 lbs bag
$45.75 / 55 lbs bag
$47.35 / 55 lbs bag
$45.58 / 77 lbs bag
$45.58 / 77 lbs bag

    click to return to styles and colors

  • overview

    the story

    St. Astier Natural Hydraulic Lime Plaster is a traditional European finish that has been used for centuries to create a look as easy on the eyes as it is on the environment. Its appearance improves with age, exhibiting a patina that deepens in color and takes on a character of its own. The rich velvety texture lures you in and makes the building seem one with its natural surroundings. With no chemical additives, St. Astier Natural Hydraulic Lime is the ultimate safe, natural building finish.

    performance

    St. Astier Natural Hydraulic Lime Finishes have been in production for over 150 years and contain no additives. Millions of tons have been used successfully in diverse climates around the world. The absence of detrimental chemicals like tri-calcium aluminate, potassium and sodium oxides, which are present in cement, protects the finish from chemical reactions such as sulfate or alkali attacks.

    The finish sets quickly, yet develops strength gradually over time. Its elasticity allows for minor movements, minimizing shrinkage and cracking. The binder used in the finish has a long lasting alkalinity that inhibits bacteria and mold growth. St. Astier Natural Hydraulic Lime Plaster can also be reworked within 8 to 24 hours, reducing waste and time required for application.

    Next: Health Issues
  • health

    at home

    St. Astier Natural Hydraulic Lime Plasters have no additives of any kind. They consist entirely of natural limestone and, unlike some clinker cement, do not contain any carcinogens.

    The plasters are also breathable, allowing moisture to escape from the wall behind it. When used indoors, this trait helps to balance humidity levels in the home.

    on the planet

    Natural Hydraulic Lime Plaster production requires approximately 1/4 of the amount of energy that comparable cement-based finishes do. The most eco-friendly feature of these finishes is that they re-absorb carbon dioxide while curing, which offsets the majority of carbon released during production.

    Natural Hydraulic Lime Plaster finishes last for generations when applied and maintained correctly. If for some reason the plaster is ever removed, or the building deconstructed, it may also be recycled into aggregate for new finishes, fertilizer, or can be used for water purification or hazardous waste treatment. Material safety data sheet

    Next: Use
  • use

    how much do i need?

    Quantities needed vary by type of plaster. Reference the PDF files on the colors and styles tab for recommended quantities.

    how is it applied?

    Lime plasters can be mixed in standard cement mixers. Standard Natural Hydraulic Lime Plaster will need to be mixed with sand or is available pre-mixed as “EcoMortar.”

    Application varies by type of plaster and coat (Scratch Coat, Brown Coat or Finish Coat) but in general can be sprayed or troweled on by hand. Product should be applied with temperatures between 40 and 85 degrees Fahrenheit.

    Avoid rapid drying due to high temperatures or strong winds by curing with a light water mist several times a day if necessary. Protect from frost, rain, direct sun and strong winds for a minimum of 48-96 hours, depending on plaster type.

    Reworking is possible within 8-24 hours, depending on the plaster used.

    application information

    NHL 2
    Pure and natural hydraulic lime, feebly hydraulic, used when elasticity, low strength or high vapor exchange are desirable.
    Recommended applications: finishes, mortars for weak stones.

    More information


    NHL 3.5
    Pure and natural hydraulic lime, moderately hydraulic, recommended when moderate strengths and better freeze-thaw resistance are required.
    Recommended applications: base coats, stone work

    More Information


    NHL 5
    Pure and natural hydraulic lime, eminently hydraulic, specified when strength and high freeze-thaw resistance are necessary.
    Recommended applications: slabs, mortars for hard stone.

    More Information


    EcoMortar F-2
    Premix based on pure and natural hydraulic lime (NHL 2) and fine sand.
    Recommended applications: for masonry work, plastering finish coats. Color packs for the EcoMortar F-2 are available in a wide range of colors.

    More Information


    EcoMortar F-3
    Premix based on pure and natural hydraulic lime (NHL 3.5) and fine sand.
    Recommended applications: for masonry work, plastering finish coats. Color packs for the EcoMortar F-3.5 are available in a wide range of colors.

    More Information

    Previous: Use


Related Products


American Clay