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Diathonite Deumix+ Sale
Breathable insulating plaster for moisture and salt control in masonry walls. Regulates rising damp, prevents efflorescence, and improves durability. Free shipping in Canada.
From $231.19 CAD
Buy Diathonite Deumix+ from $231.19 CAD
Natural moisture regulating plaster
Diathonite Deumix+ is a powerful thermal insulating plaster designed to combat moisture and salt deposits in masonry walls. Made from natural ingredients like Hydrated lime, NHL 5 binder, clay, cork, and diatomaceous earth, this breathable and capillary-active plaster offers superior insulation properties. Deumix+ excels in managing excess moisture and rising damp while regulating humidity, creating a healthier and more durable environment. It's the perfect solution for walls facing persistent moisture and salt-related issues, ensuring long-lasting protection and insulation.
Weight: 20 kg
For additional inquiries, please submit our Contact form.
- Regulates rising damp and moisture movement in masonry
- Prevents salt efflorescence and spalling
- Breathable and vapor-permeable — allows walls to "breathe"
- Improves thermal performance (λ = 0.08 W/mK)
- Fire-resistant (Euroclass A1)
- Contributes to LEED, WELL, and BREEAM credits
- Suitable for historic and restoration projects
- Enhances indoor air quality by reducing mold risk
Yield: 4.40 kg/m² per cm thickness (±10%), 0.90 lb/ft² per inch thickness (±10%)
Density: 450 kg/m³ (±10%), 28.09 lb/ft³ (±0.62%)
Grain size: 0–3 mm, 0 – 0.11 in
Application temperature: +5°C to +30°C (+41°F to +95°F)
Thickness: Minimum 1.5 cm, maximum 2.5 cm (2 cm for ceilings)
Drying time (T=23°C; U.R. 50%) : 15 days
Fire reaction: Euroclass A1
Compressive Strength: 5.1 N/mm² (739.69 lbf/in² (psi))
Flexural strength: 1.4 N/mm² (203.05 lbf/in² (psi))
Dried mortar porosity: 71.64%(17.83% macroporosity and 54.94% microporosity)
Vapour permeability coefficient (µ): µ = 4/WVT = 14 grains/h·ft²
Thermal conductivity: 0.08 W/mK
Thermal resistance (R) for 1 cm/ 0.4 in thickness: 0.125 m²K/W
Adhesion onto the support (brick): 0.258 MPa = N/mm² U
Storage: 18 months
Packaging: 20 kg (44 lb) paper bag
What is Diathonite Deumix+ used for?
It's designed to regulate moisture and prevent salt deposits in solid masonry walls — ideal for basements, historic buildings, and exterior walls with damp issues.
Can it be used on interior walls with rising damp?
Yes — Deumix+ is perfect for interior masonry walls suffering from rising damp or moisture migration.
How does it prevent salt damage?
It manages moisture movement through capillary action, reducing salt buildup and preventing spalling and efflorescence.
How thick should it be applied?
Typically 1.5–2.5 cm, depending on structural and insulation needs. Can be applied in multiple layers.
Do I need a primer for Diathonite?
It depends on the substrate.
Use Aquabond Adhesive Primer on:
• Smooth concrete or plaster
• Painted surfaces
• Cementitious boards (e.g., Durock, HardieBacker)
• Wood, glass, or metal
• Any non-absorbent or low-porosity surface
You do NOT need a primer on:
• Absorbent masonry (brick, stone, rough concrete)
• Existing Diathonite layers
• Properly prepared, porous substrates
Aquabond adds texture and improves adhesion — it’s not required for all applications.
How is it installed?
By hand trowel or spray machine. We recommend professional installation for structural or restoration projects.
Is it fire-resistant?
Yes — classified as A1 (non-combustible) under EN 13501-1.
Can I paint over it?
Yes — once cured, it can be painted with mineral or lime-based paints.
Package: 20 kg (44 lbs)
Coverage: 4.4 kg/m² (±20%) per cm of thickness/0.90 lb/ft²(±10%) per inch of thickness.
Per Package: 4.5 m² (49 ft²)
4,40 kg/m2
(±10%) per cm of thickness.
- Concrete
- Masonry
- Plaster
Questions? Contact us for answers!



