Product Overview
EcoMortar® F3.5 Finish is a dry, ready-mix lime plaster crafted with Saint-Astier® Natural Hydraulic Lime NHL 3.5. Designed as the final stucco coat in exterior lime render systems, it delivers outstanding adhesion, breathability, and flexibility — all without cement or artificial additives. EcoMortar® F3.5 Finish This finish coat offers enhanced strength and weather resistance, making it ideal for everything from historic restoration to high-performance modern exteriors. When applied over EcoMortar® Base, it completes a fully natural, breathable stucco system that’s built to last and made to impress.
It’s what your walls wear when they’re ready to stand out.
Key Benefits
● High Compressive Strength: Achieves up to 3.6 N/mm² after 90 days, ensuring long-lasting durability.
● Vapour Permeable: Facilitates moisture movement, reducing the risk of trapped moisture and associated damage.
● Cement-Free Composition: Composed solely of natural hydraulic lime, ensuring compatibility with historic masonry and sustainable building practices.
● Enhanced Elasticity: Offers superior flexibility compared to cementitious products, accommodating minor structural movements.
● Environmentally Friendly: Produced with lower energy than cementitious mixes and contributes to CO₂ re-absorption during curing.
Recommended Applications
● Finishing Coat for External Lime Renders: Provides a durable and breathable top layer in lime render systems.
● Restoration Projects: Ideal 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 NHL 3.5
● 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.
Notable Projects
● Historic Building Restoration: Utilized in the conservation of a 19th-century stone building, ensuring compatibility with original materials and enhancing breathability.
● Eco-Friendly Housing Development: Applied in the construction of a sustainable housing project, contributing to energy efficiency and environmental goals.
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.
