This article summarizes the official Earthaus Stone Plaster Product Data Sheet, adapted for clarity and ease of reference. To view the full document, see the Stone Plaster Product Data Sheet (PDF).
What Is Stone Plaster?
Earthaus Stone Plaster is an interior lime plaster formulated for a smooth finish that can be left matte or burnished. Made from 100% natural materials, it provides a breathable, durable, and eco-friendly finish. Stone Plaster offers excellent workability, strong adhesion to compatible substrates, and superior moisture management properties. It is ideal for creating organic, timeless aesthetics on interior walls in residential, commercial, and heritage restoration projects.
Composition
Hydrated lime
Pumice aggregates
Cellulose binder
Packaging
Bag size: 32 lbs
Pallet quantity: 60 bags
Properties
100% natural materials
Zero VOCs or chemical additives
Durable, breathable, and mold-resistant
Absorbs CO₂ during curing, reverting to limestone
Usage
Designed for interior applications only, applied over:
Level-4 finished drywall
Painted walls
Sand Plaster in the BUILD Interior Plaster Assembly
Installation
For drywall or painted walls: see the Stone Finish Installation Guide.
For BUILD system use: see the BUILD Interior Finishes Guide.
Limitations
Not suitable for exterior use.
Not suitable for showers or wet applications.
Color
Standard: white with a light grey undertone.
Tinting: can be pigmented with Earthaus mineral pigment colors or universal colorants.
Applied Thickness & Coverage
Over drywall or previously painted surfaces: 150 ft² per 32 lb bag.
Applied in two 1/32" coats for a total thickness of 1/16".
As part of the BUILD system: applied over a Sand Plaster basecoat.
Sealing
Stone Plaster can be sealed with Earthaus Olive Oil Soap Sealer.
Creates a water-resistant yet vapor-permeable surface.
Storage
Mixed plaster: store covered at room temperature for up to 14 days. Remix before use.
Unmixed bags: store in dry conditions, low humidity, up to 1 year.
Disposal
Allow excess Stone Plaster to dry completely.
Dispose of dried plaster in household trash.
Safety Information
Hydrated lime is strongly alkaline and may cause severe injury on contact with skin or eyes. Inhalation of dust can irritate the respiratory system. Use appropriate PPE.
Required PPE: gloves, eye protection, long sleeves, dust mask or respirator.
Avoid: skin and eye contact, prolonged dust inhalation.
Emergency response:
Eyes: Flush with water; seek medical attention immediately.
Skin: Wash with water and mild soap; consult physician if irritation persists.
Inhalation: Move to fresh air; seek medical attention if symptoms persist.
Ingestion: Do not ingest; seek medical attention immediately.
Disclaimer
The performance and appearance of Stone Plaster depend on proper handling, preparation, and installation techniques, which are outside Earthaus's control. Earthaus does not assume responsibility for final outcomes.
© 2025 Earthaus Plaster LLC.
Still Have Questions? Email support@earthausplaster.com or text 1-800-917-2414.