This article summarizes the official Earthaus Breathable Sealer Product Data Sheet, adapted for clarity and ease of reference. To view the full document, see the Breathable Sealer Product Data Sheet (PDF).
What Is Breathable Sealer?
Earthaus Breathable Sealer is a chemically reactive, deep-penetrating siliconate concentrate designed for unsealed exterior Lime Stucco and Lime Slurry finishes. Within 48 hours, the sealer fully reacts, forming an insoluble membrane inside the material — delivering complete water resistance while maintaining breathability.
What It Does
Water repellency: Reduces water absorption and minimizes moisture ingress; curbs freeze/thaw damage.
Durability: Shields surfaces from chemicals, salts, UV exposure, acid rain, and alkali attack.
Maintenance: Inhibits mold, mildew, and dirt buildup.
Non-yellowing: UV resistant; remains clear upon application.
Composition
Potassium Methylsiliconate concentrate
Packaging
1 quart bottle
1 gallon bottle
Properties
Appearance: Clear, flat finish
VOC: Zero VOCs
How to Apply Breathable Sealer
Ensure substrates are fully cured, clean, and dry.
Dilution: 7 parts water : 1 part sealer (stir thoroughly).
Apply with low-pressure sprayer, roller, or brush.
Apply until saturation ("point of rejection").
Drying: 1–3 hours to touch; 48 hours to full cure. Keep substrate dry for 48 hours after application.
If finish remains highly porous after 48 hours, apply a second coat.
Size & Coverage
1 Quart → makes 2 gallons → covers up to 400 ft²
1 Gallon → makes 8 gallons → covers up to 1600 ft²
Storage
Store in cool, dry area (40°F–95°F). Avoid freezing.
Shelf life: 2 years (opened or unopened).
Safety Information
Breathable Sealer is highly alkaline.
Wear chemical-resistant gloves and safety glasses.
Wash hands thoroughly after handling.
© 2025 Earthaus Plaster LLC. All rights reserved.
Still Have Questions?
Email support@earthausplaster.com or text 1-800-917-2414.