This article summarizes the official Earthaus Marble Installation Guide — covering substrate preparation, the Stone Plaster base coat, Marble Plaster finish coats, burnishing, and sealing. You can also view the full Earthaus Marble Finish Application Guide (PDF).
Description
The Earthaus Marble Finish is inspired by traditional Italian Venetian plaster. It is a fine-grained formula designed to be polished by burnishing, producing an ultra-smooth and reflective surface. Darker colors reveal more variation and mottling when polished.
Not suitable for shower use.
Materials Summary
Total system thickness: 1/16"
Substrate preparation: Prime with Earthaus Primer Grit additive over level-4 drywall or previously painted wall.
Stone Plaster: One 1/32" coat.
Marble Plaster: Two coats, together totaling 1/32".
Mineral Pigment Pack: One pack per bag of Stone and Marble Plasters.
Olive Oil Soap Sealer: One coat.
Why this matters: Thin, consistent layers ensure both durability and aesthetic quality. Over-thickness increases the risk of cracking.
Properties
Made from US-quarried lime, pumice, mineral pigments, and plant-based binder.
100% natural materials. Zero VOCs or chemical additives.
Excellent adherence and workability.
Absorbs CO2 during curing and becomes limestone. Mold and mildew resistant.
Preparation
Tools needed:
Plaster mixing: 1200 RPM drill, egg beater paddle, 5-gal buckets, mesh strainer, sponge, hawk, trowel.
Sealer: 1-gal bucket, roller or brush.
Safety precautions: Highly alkaline when wet. Wear dust mask, safety glasses, gloves, protective clothing.
Substrate preparation: Use low or zero VOC primer with Earthaus Primer Grit (1 cup per gallon). Apply evenly, allow to fully dry.
Application Sequence
Base coat — Stone Plaster.
Mixing: Add 2.4 gallons water, add pigment, strain. Add plaster, mix 3 min. Thick milkshake consistency.
Application: Apply 1/32" thickness. At 60% dry, smooth ridges. Let dry fully.
Finish coats — Marble Plaster.
Mixing: Add 3 gallons water. Add Marble plaster while mixing. Mix 3 min until smooth. Strain through mesh strainer.
Application:
Apply a very thin tight coat.
While damp, apply the second tight coat. Do not let the first coat dry.
As plaster firms, burnish with a clean trowel for sheen.
For matte finish, stop here. For polished finish, continue to sealing.
Sealing — Olive Oil Soap Sealer.
Wait until Marble surface is completely dry (at least 12 hours).
Dilute 1 quart sealer in 1 gallon warm water.
Apply with brush or roller in small sections.
Start at the bottom of the wall and avoid drips.
Disclaimer
Performance depends on correct handling, preparation, and installation techniques. Earthaus does not assume responsibility for outcomes beyond its control.
Copyright 2025 Earthaus Plaster LLC.
Still have questions? Email [email protected] or text 1-800-917-2414.