Product Overview
EcoMortar® Base is a dry, ready-to-use lime mortar formulated with Saint-Astier® Natural Hydraulic Lime. Specifically designed to serve as the scratch and brown coat in a lime render or stucco system, it provides excellent adhesion, flexibility, and breathability — all without cement or synthetic additives. As the foundation layer in traditional or modern lime plaster systems, EcoMortar® Base is used to level and build up the wall surface in preparation for the final finish coat. Its natural composition makes it ideal for both new construction and restoration work, ensuring compatibility with a wide range of masonry types. Durable, eco-conscious, and easy to apply, EcoMortar® Base is the trusted starting point for long-lasting, breathable stucco systems. Pair EcoMortar® Base with EcoMortar® F3.5 Finish to complete your stucco system, a perfect match for long-lasting, natural, and breathable exterior finishes.
Recommended Applications
● Base Coat for External Lime Renders: Provides a solid foundation for finishing coats in lime render systems.
● Restoration Projects: Perfect for use in the conservation of historic buildings requiring breathable and compatible materials.
● Eco-Friendly Construction: Suitable for new builds aiming for sustainability and natural building practices.
Packaging and Storage
● Available Sizes: 77 lb bags
● Shelf Life: 12 months from the production date when stored in dry conditions and in original packaging.
● Storage: Keep in a dry, cool place to maintain product integrity.
Composition
● Binder: Saint-Astier® Natural Hydraulic Lime
● Aggregates: Well-graded fine sands
● Additives: Natural additives to enhance workability and curing
Application Guidelines
● Mixing: Combine with clean, potable water to achieve a workable consistency.
● Application Conditions: Apply at temperatures between 8°C and 30°C. Protect from frost and rapid drying conditions.
● Curing: Maintain moisture for at least 5 days post-application to ensure proper curing.
● Reworking Time: Mortar remains workable for up to 24 hours; remixing does not reduce performance.
Technical Specifications
| Property | Value |
| Dry Bulk Density | 1400 kg/m³ |
| Compressive Strength | 7 days: 1.2 N/mm² 28 days: 1.9 N/mm² 90 days: 3.6 N/mm² |
| Elasticity Modulus | 5000 MPa |
| Vapour Permeability | 0.85 g/m²·h·mmHg |
| Capillarity | Type C and F |
| Maximum Grain Size | EF: 0.8 mm TF: 1.3 mm F: 1.8 mm M: 2.5 mm |
Note: “EF” refers to the Extra Fine granulometry, “TF” to the Thin Fine, “F” to Fine, and “M” to Medium.
