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Home Lime Binders Saint-Astier® Natural Hydraulic Lime
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Saint-Astier

Saint-Astier® Natural Hydraulic Lime

Rated 5.00 out of 5 based on 20 customer ratings
(20 customer reviews)

$6.00 – $60.00

Benefits

  • Pure & Naturally Occurring
  • High Vapor Permeability
  • Excellent Modulus of Elasticity
  • Resistant to Sulfate Attack & Alkali-Silica Reaction
  • Low Carbon Footprint
  • Allows Reuse of Masonry
  • Autogenously Healing
Clear
SKU: N/A Categories: All Products, Lime Binders, Lime Mortars, Lime Plaster & Stucco Tags: 2, 3.5, 5, Binder, brick mortar, Hydraulic, laying bricks, Lime, lime binder, lime mortar, limestone, Mortar, Natural, NHL, old mortar repair, old plaster repair, Plaster, Saint-Astier, St. Astier, stone mortar, Stucco
MPN: N/A
Brand: Saint-Astier
  • Description
  • Additional information
Description

Product Details

Description

Saint-Astier® Natural Hydraulic Lime

Saint-Astier® Natural Hydraulic Lime (NHL) is an industry-standard used for historic restoration mortar, stucco, and Plaster with no harmful portland cement present or required. Saint-Astier® NHL is pure and natural, free of additives, and has been in use throughout the world for over 150 years. To learn more about Saint-Astier® visit StAstier.com.

Why SAINT-ASTIER® NHL?

Click here to get the PDF.

Need Pre-mixed material?

Check out our premixed Ecologic Mortar, based on Saint Astier Natural Hydraulic Lime.

Need something more custom?

We do custom simulations for mortar, brick, stone, terracotta, and paint. Visit “Ordering a Custom Formulated Simulation” to learn more.

Benefits

Slide
Compatible with historic masonry
Compatible with historic masonry
Compatible with historic masonry
Compatible with historic masonry
Compatible with historic masonry
Compatible with historic masonry
Lime Binders
High Vapor Permeability
Concrete
Immune to Salts and Sulfates
Concrete
Immune to Salts and Sulfates
Limewash and Mineral Paint
NHL 3.5 will reach 750 PSI
Contains No Portland Cement
Contains No Portland Cement
Contains No Portland Cement
Contains No Portland Cement
Lime Binders
Low modulus of Elasticity
Concrete
Low Carbon Footprint
Limewash and Mineral Paint
Allows Reuse of Masonry
Limewash and Mineral Paint
Pure and Naturally Occuring
Limewash and Mineral Paint
Ships Nationwide

Benefits

Maintaining good vapor permeability in the exterior envelope of an historic building will allow the historic masonry units themselves to have an even longer service life thus keeping them in a better state of conservation. Vapor permeability is also key to the longevity of new sustainable construction projects. Saint-Astier® NHL has low capillarity and high vapor permeability. Independent studies have shown Saint-Astier® NHL to have a higher level of vapor permeability than all mortar mixes containing any amount of Portland cement. This remains true while achieving comparable strengths for many applications without the need to add Portland cement or a Pozzolan to achieve proper and effective mix designs.

Immune to Salts and Sulfates
Saint-Astier® NHL is completely immune to sulfates and salts. Alkali-silica reactions, common with Portland cement mortars do not take place with Saint-Astier Natural Hydraulic Limes. This is due to the absence of tri-calcium aluminates only created in high temperature fired kilns which are required for the production of Portland Cement.

Modulus of Elasticity
Saint-Astier® NHL has an excellent modulus of elasticity. Unlike Portland cement-based mortars, Saint-Astier® NHL mortars limit the requirements for strategically placed control joints in walls. The breathability of mortars made with Saint-Astier® NHL also reduces, if not eliminating, the requirement for weep vents in curtain or veneer walls.

NHL 2 Description & Coverage

NHL 2 (Natural Hydraulic Lime)

  • Feebly Hydraulic lime is used where the highest amount of “free lime” is desired along with the greatest modulus of elasticity, low strength or high vapor exchange. It sets with air and water and cures in about four days
  • Very soft pointing mortars used for repairing around friable historic masonry

NHL 2 Bag Coverage for Plaster and Stucco

Ratio
1:2 1:2.5
Thickness Coverage ft2
1/8″ 269 324
1/4″ 134 162
3/8″ 89 108
1/2″ 67 81
3/4″ 44 54
1″ 33 40

NHL 3.5 Description & Coverage

NHL 3.5 (Natural Hydraulic Lime)

  • Moderately Hydraulic lime is recommended for use when moderate strengths and better freeze-thaw resistance is required.
  • Used for applications such as laying or repointing brick, stone and terra cotta units even in extreme freeze-thaw climate cycles.
  • It can be used to make scratch, brown and finish coats of exterior stucco
  • Quick Estimation Numbers

NHL 3.5 Bag Coverage for Plaster and Stucco

Ratio
1:2 1:2.5
Thickness Coverage ft2
1/8″ 203 221
1/4″ 101 110
3/8″ 67 73
1/2″ 50 55
3/4″ 33 36
1″ 25 27

NHL 5 Description & Coverage

NHL 5 (Natural Hydraulic Lime)

  • Eminently Hydraulic lime is specified when strength and high freeze-thaw resistance are necessary.
  • Used for applications such as building or repairing wall head copings, pointing and parging the water table or foundation of a building and making lime concrete. Sea-bearing walls can be built and repaired with NHL 5 since it has only trace amounts of soluble salts.

NHL 5 Bag Coverage for Plaster and Stucco

 

Ratio
1:2 1:2.5
Thickness Coverage ft2
1/8″ 203 230
1/4″ 101 115
3/8″ 67 76
1/2″ 50 57
3/4″ 33 38
1″ 25 28

Submittal and Installation Data

Application and Product Data

  • NHL 2
  • NHL 3.5
  • NHL 5

Technical Specifications

  • Ecologic™ and Saint-Astier® Stucco and Plaster Comparison Chart
  • The 5 Most Important Steps
  • Los Cinco Pasos Más Importantes Para la
    Preparación del Producto
  • NHL Breathability
  • Physical & Mechanical Data
  • NHL Reworking
  • Sea Water Resistance
  • 24 Month Tests

Saint-Astier Datasheets

  • NHL 2
  • NHL 3.5
  • NHL 5
  • Product Leaflet

Specifications

  • Masonry Cladding

Safety Data Sheets (SDS)

  • NHL 2
  • NHL 3.5
  • NHL 5
  • NHL Quality Control

General Installation Guidelines

  • Guidelines
  • More info at stastier.com

Videos

Reworking Lime Mortar after 24hrs

Is it Lime or Cement Mortar?

Mix Lime Mortar…Like A This!

The Impact of Natural Hydraulic Mortars

Blogs

St. Astier Natural Hydraulic Lime for Historic Restoration, Conservation and New Build Projects

Another Successful Straw Bale Building with Natural Hydraulic Lime Plaster – Little Rock Arkansas

Israel Nature and Parks Authority The Conservation of the Archeological Parks The use of St. Astier Natural Hydraulic Limes

How do Natural Hydraulic Lime Mortars Compare to Common Type-O Mortars Containing Portland Cement?

Historic Brownstone Restoration With Breathable Natural Hydraulic Lime

The Mysterious Newport Tower, Restored Using Natural Hydraulic Lime

What Sand Should I Use With Natural Hydraulic Lime For Repointing My Building? FAQ Friday

One quick question on Natural Hydraulic Lime, FAQ Friday

Differences Between Repointing with Natural Hydraulic Lime (NHL) Mortars vs. Cement-Based Mortars FAQ

Workshops

ARTisAn Objective® Workshop MAS-01 Basics of Repointing Brick & Stone Using Lime Mortar

ARTisAn Objective – Workshop MAS-02 – Repointing Special Joint Profiles Using Lime Mortar

Notable Projects

LW_Tales3
22 Mar

A Tale of Two Sites

The Story of How Two Historic Preservation Projects were Restored After Devastating Hurricanes The environment in which a person ...
Mt. Vernon
19 May

Restoring Mt. Vernon’s Upper Garden Wall

by Debra Grube and Samantha Horvath LimeWorks.us is providing a custom blend of our Ecologic™ Mortar for the restoration of Mt. V...
st-patricks-cathedral-spires-536x400
21 Oct

Restoring St. Patrick’s Cathedral

An Undertaking of Passion and Love LimeWorks.us is a big part of helping to restore a prominent landmark in New York City, St. Patri...
UVA Rotunda
28 Feb

Repair Campaign at the Rotunda, University of Virginia Restores with Lime

We’re so proud to be part of an incredible restoration campaign currently taking place at the University of Virginia. The Rotunda is...
The Old Parry mansion
10 Aug

Conserving A Pennsylvania Treasure, New Hope’s Historic Parry Mansion

The Parry Mansion located in downtown New Hope Pennsylvania is one the finest relics of the river town’s historic past. Benjamin Par...
Sand for Natural Hydraulic Lime
02 Mar

What Sand Should I Use With Natural Hydraulic Lime For Repointing My Building? FAQ Friday

How to choose sand for Natural Hydraulic Lime Quick and short of it…. when choosing sand for Natural Hydraulic Lime, make sure the ...
Eldridge Street Synagogue
12 Jan

Restoration of the Eldridge Street Synagogue in New York City with Ecologic™ Mortar

In the heart of what is now Chinatown on the Lower East Side in Manhattan lives the Eldridge Street Synagogue. A very important Jewi...
Additional information
Weight N/A
Dimensions N/A
Brand

Saint-Astier

20 reviews for Saint-Astier® Natural Hydraulic Lime

5.0
Based on 20 reviews
5 star
100
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%

Customer Images

Image #1 from Brian
Image #2 from ALLEN JOHNSON
Image #3 from ALLEN JOHNSON
Image #1 from Brian
Rated 5 out of 5

Brian

September 2, 2021

With all of the info LimeWorks provides and the great products they sell, I was able to match our repairs perfectly to the 114 year old stucco on our house. Truly a great product and a great company! Picture is during the finish coat application so you can see what's new and what's existing. On this area and many others we used 12x 55lb bags of NHL 3.5 and a little over 1T of sand, the Lime was consistent throughout all of it.

(2) (0)
Image #2 from ALLEN JOHNSON
Rated 5 out of 5

ALLEN JOHNSON

June 9, 2022

Quick shipping and excellent Customer Support. I had a couple of questions about the lime mortar to sand ratio. My questions were answered within thirty minutes each time. Anthony Hita, Architectural Conservator, was great to work with. Following Anthony's guidance, the mix was easy to work with and I am confident that my Great-Grandfather's slotted tombstone will stand for another hundred years.

(0) (0)
Image #3 from ALLEN JOHNSON
Rated 5 out of 5

ALLEN JOHNSON

June 9, 2022

Quick shipping and excellent Customer Support. I had a couple of questions about the lime mortar to sand ratio. My questions were answered within thirty minutes each time. Anthony Hita, Architectural Conservator, was great to work with. Following Anthony's guidance, the mix was easy to work with and I am confident that my Great-Grandfather's slotted tombstone will stand for another hundred years.

(0) (0)
Image #1 from Brian
Image #2 from ALLEN JOHNSON
Image #3 from ALLEN JOHNSON
  1. Brian
    Verified Customer
    September 2, 2021
    Rated 5 out of 5

    With all of the info LimeWorks provides and the great products they sell, I was able to match our repairs perfectly to the 114 year old stucco on our house. Truly a great product and a great company! Picture is during the finish coat application so you can see what’s new and what’s existing. On this area and many others we used 12x 55lb bags of NHL 3.5 and a little over 1T of sand, the Lime was consistent throughout all of it.

    Image #1 from Brian
    (2) (0)
  2. Ben J.
    Verified Customer
    August 4, 2021
    Rated 5 out of 5

    I ordered a 55lb bag of NHL 5 to restore the parging of a wall in my 100-year-old basement (the mix was 2½:1 with all purpose sand from Home Depot). The bag was packaged with bubble wrap and placed in an appropriately sized cardboard box with all seams sealed with tape. Natural Hydraulic Lime is somewhat of a rare material in the US, so I was pleased that Limeworks offers fast shipping at a reasonable rate.

    (1) (1)
  3. Anonymous
    Verified Customer
    April 26, 2021
    Rated 5 out of 5
    (0) (1)
  4. Matthew
    Verified Customer
    March 31, 2021
    Rated 5 out of 5

    Great service, I will definitely be back!

    (0) (1)
  5. Kenneth Allan
    Verified Customer
    December 30, 2022
    Rated 5 out of 5
    (0) (0)

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LimeWorks.us Brands

Links To Other Conservation Organizations

Links To Other Conservation Organizations

National Park Service

National Trust for Historic Preservation

U.S. Green Building Council

PTN

APT International

AIC

Sealant, Waterproofing & Restoration Institute 

The Construction History Society

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