Mapei Mapetherm Thermal Insulation Adhesives: Strong Bonding with AR1 GG, AR1 Light, and Kleber
In External Thermal Insulation Composite Systems (ETICS), one of the most critical factors determining the overall performance of the system is the quality of the adhesive mortar. Mapei’s Mapetherm range offers professional solutions with high bonding strength, ease of application, and long-term durability.
Among the series, three products stand out: Mapetherm AR1 GG, Mapetherm AR1 Light, and Mapetherm Kleber.
What Is the Mapetherm Series?
Mapetherm is a complete product family developed for exterior insulation systems. It includes adhesive mortars, base coats, reinforcing meshes, and finishing coatings. This integrated system approach ensures compatibility between components and long-term performance.
1. Mapetherm AR1 GG
Mapetherm AR1 GG is a cement-based, fiber-reinforced mortar that can be used both as an adhesive and as a base coat render.
Technical Features
- Single-component (mixed with water)
- Density: approximately 1.4 kg/m³
- Bond strength: ≥ 0.6 N/mm²
- Consumption: 4–6 kg/m²
- Working time: approximately 4 hours
- Temperature resistance: -30°C to +90°C
Applications
- EPS insulation boards
- XPS insulation boards
- Mineral wool panels
- Concrete and rendered surfaces
Main Advantage
A versatile solution that allows both bonding and rendering with a single product.
2. Mapetherm AR1 Light
Mapetherm AR1 Light is a fiber-reinforced adhesive and rendering mortar formulated with lightweight aggregates and reduced density.
Technical Features
- Density: approximately 1.2 kg/m³
- Consumption: 4–5 kg/m²
- Bond strength: ≥ 0.6 N/mm²
- Drying time: approximately 3–5 hours
- Reduced carbon footprint
Applications
- Lightweight façade insulation systems
- EPS insulation boards
- Mineral wool insulation panels
Main Advantage
Its lightweight composition improves workability while supporting environmentally conscious construction practices.
3. Mapetherm Kleber
Mapetherm Kleber is a polymer-modified, cement-based adhesive mortar specifically developed for bonding insulation boards.
Technical Features
- Single-component
- Density: approximately 1.4 kg/m³
- Consumption:
- EPS boards: 4–4.5 kg/m²
- Mineral wool boards: 5–6 kg/m²
- Mixing ratio: 24–26% water
- High bond strength
Applications
- EPS insulation boards
- XPS insulation boards
- Mineral wool panels
- Concrete, brick, and mineral-based substrates
Important Note
This product is designed exclusively for bonding applications and is not intended for rendering or base coat use.
Technical Comparison
| Product | Type | Density | Consumption (EPS / Mineral Wool) | Mixing Ratio | Bond Strength | Key Feature |
|---|
| AR1 GG | Mortar | ~1.4 kg/m³ | 4–6 kg/m² | 21–24% | ≥ 0.6 N/mm² | Bonding + rendering |
| AR1 Light | Mortar | ~1.2 kg/m³ | 4–5 kg/m² | 21–24% | ≥ 0.6 N/mm² | Lightweight and eco-friendly |
| Kleber | Adhesive | ~1.4 kg/m³ | 4–4.5 / 5–6 kg/m² | 24–26% | High | Bonding only |
Frequently Asked Questions
Can Mapetherm Kleber be used as a rendering mortar?
No. This product is designed exclusively for bonding insulation boards.
Which product is the lightest?
Mapetherm AR1 Light is the lightest option due to its reduced-density formulation.
Which product should be selected for bonding-only applications?
Mapetherm Kleber is specifically designed for adhesive applications.
Which insulation boards are compatible with these products?
They are compatible with EPS, XPS, and mineral wool insulation boards.
Conclusion
The Mapei Mapetherm Series offers tailored solutions for various insulation projects through AR1 GG, AR1 Light, and Kleber products. Selecting the correct adhesive mortar directly impacts the performance and longevity of an ETICS system.
With the appropriate product choice, contractors can achieve more durable, energy-efficient, and long-lasting thermal insulation systems that contribute to improved building performance and sustainability.