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Technical Information


Packaging: 50 lb. or 63 lb. recyclable bags.


Storage: Store indoors elevated off the floor. Plaster should acclimate within 72 hours to the environment.


VOC's (Volatile Organic Compounds): Zero-VOC's.


Mold Resistance: 0% mold growth, per test results from procedure ASTM D3273-00. To learn learn more about American Clay Earth Plasters' humidity bufferring qualities, watch our short video demonstration comparing clay plaster against paint in a highly humid environment. You

can also download a handout explaining the demonstration.


Flame Spread: ASTM E84, rating of 5; UBC Class I. NFPA Class A. Smoke development 0.


Sound: ASTM 423-07; SAA: 0.09; NRC: 0.10. ASTM 90-04; STC:31.


Permeability: ASTM E-96; 45.76 perms; 16.91 grains/hr-ft2.


Recycled Content: 72% post-industrial by weight.


Carbon Footprint: 0.026 pounds of CO2 per pounds of product. In comparison, Paint is 0.729 pounds of CO2 per pounds of product.

  • Source: Inventory of Carbon & Energy (ICE); Published by Geoff Hammond & Craig Jones, 2008


Application: Complete application instructions can be downloaded from our website, under Product Application.


Clean Up: Water with a damp sponge or rag.


Drying Time: Climate will affect product drying time. 2-4 hours per coat in dry climates and 6-10 hours per coat in humid climates. Dehumidifiers and increased air circulation using fans will decrease dry time.


USGBC LEED Credits: One of the oldest and most natural building materials, clay offers durability, sustainability and beauty unrivaled in other finishes. American Clay is dedicated to preserving and respecting the world around us. As a result, all of our plasters are clay-based, continuing the tradition of people the world over for thousands of years.


With our plasters, your walls will stand as long as your home or office does, removing the need for continual repairs typical of other, more artificial products. American Clay is dedicated to recycling and reusing content, maintains low-energy production standards to reduce energy consumption, and sources locally to keep fuel shipment costs low.


The longevity, recycled content and low maintenance of American Clay finishes allows us to contribute to the U.S. Green Build Council's (USGBC) LEED credits. Depending on your location and the nature of your project, up to ten LEED credits are available (under the LEED-NC rating system, version 2.2). Using renewable resources, recyclable packaging and containing zero volatile organic compounds (VOC's), American Clay Earth Plasters will help make your project better for your home in your city, as well as your home on Earth.


For more information on American Clay and LEED credits, please read our explanation and breakdown.


Easy To Use and Zero Waste: Take your time and work with confidence, our plasters have a long working time and can be reworked even after they dry. There is no waste; excess plaster can be dried and re-hydrated for repairs.


American Clay Enterprises, LLC Warranty:

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