Diasen · Insulation
Diathonite Thermactive
Diathonite Thermactive by Diasen combines recycled cork, natural hydraulic lime (NHL 5), perlite, cellulose and pumice in a machine- or trowel-applied insulating stucco. It serves as continuous insulation and a substrate for interior plaster or exterior stucco, without foam boards or joints.
Its vapor-permeable composition supports moisture absorption and release, making it well suited to masonry retrofits and historic buildings where moisture management is critical. The monolithic application follows the substrate and provides a continuous insulating layer.
- Applications
- Interior masonry walls, Exterior stucco, Continuous insulation, Historic retrofits
- Properties
- Recycled cork, Natural hydraulic lime, Vapor-permeable, Joint-free, Class A
- Composition
- Recycled cork, NHL 5 lime, perlite, cellulose and pumice
- Thermal resistance
- Approximately R-4 per inch (475 brochure, EN 12667)
- Density
- 15.6 lb/ft³ · 250 kg/m³ (±15%)
- Vapor permeability
- 45 US perms / inch (EN ISO 12572)
- Fire resistance
- Class A (ASTM E84); A1 (EN 13501)
- Application
- Machine or trowel
- Minimum thickness
- 15 mm (approximately ½ in)
- Maximum per layer
- 40 mm (approximately 1½ in)
- Bag weight
- 15 kg (approximately 33 lb)
Uses+
Interior and exterior masonry insulation, including historic interiors and exterior stucco retrofits.
Continuous insulation and a finish-ready substrate for the selected plaster or stucco system.
Installation Notes+
Machine- or trowel-applied in layers. Follow Diasen's current instructions for substrate preparation, mixing, reinforcement, curing and finishes.
Thermal performance depends on installed thickness. Confirm the supplied formulation and project-specific requirements with 475 before specifying.
Material Details+
Made with recycled cork and natural mineral ingredients, without gypsum, cement or concrete according to 475's brochure.
Vapor-permeable, lightweight and monolithic, with an alkaline lime composition that inhibits mold and fungal growth.
