Baumit MultiContact MC 55 W

Versatile Adhesive Mortar for Facade Renovation

Baumit MultiContact MC 55 W is a factory-prepared dry mortar designed for manual or machine application. It serves as an adhesive layer for concrete or a thin-layer mineral plaster for facade renovation, combining ease of use with high durability.

Key Features of Baumit MultiContact MC 55 W

• Weather Resistance: Withstands harsh weather and frost.
• Hydrophobic Properties: Prevents moisture absorption for added durability.
• Vapor Permeability: Allows walls to breathe, reducing condensation.
• Easy Workability: Enriched additives simplify application and processing.
• Reinforced Strength: Contains textile fibers for enhanced durability and crack resistance

Advantages

• Versatile Application: Suitable for concrete, mineral plasters, thermal insulation boards, and more.
• Improved Adhesion: Ideal as a bonding layer under base and top plasters.
• Long-Lasting Durability: Frost- and weather-resistant for lasting facade protection.
• Crack Prevention: Flexible structure bridges minor cracks, preventing future damage

Applications

Baumit MultiContact MC 55 W is used as a base leveling coat, reinforced with fiberglass mesh, on mineral substrates, thermal insulation plasters, resin-based plasters, and insulation boards. It can also be applied as a thin-layer finishing plaster. It complies with WTA 2-4-94 standards for renovating cracked facades.

Technical Specifications

• Classification: CS II (EN 998-1)
• Minimum Layer Thickness: 3 mm (topcoat) / 3–5 mm (reinforced layer)
• Compressive Strength: 3.5–7.5 N/mm²
• Vapor Diffusion Resistance: ≤ 25 (approx. 10)
• Thermal Conductivity:
  • ≤ 0.820 W/mK (P=50%)
  • ≤ 0.890 W/mK (P=90%)
• Grain Size: 0–1.2 mm
• Consumption: 1–2 kg/m²/mm
• Yield: Approx. 24 liters of wet mortar per 25 kg bag
• Water Requirement: 6–7 liters per 25 kg
• Packaging: 25 kg bag, 42 bags/pallet (1050 kg)
• Storage: Store in a dry, cool place on wooden pallets for up to 12 months.

Application Instructions

1. Surface Preparation:
   • Ensure surfaces are clean, dry, and free from loose particles, grease, or dust.
   • Remove peeling paint or film-forming substances like wax or form oil.
   • For highly absorbent substrates, pre-wet or use Baumit MultiPrimer.
2. Application:
   • Apply 3–5 mm thick using a trowel or machine.
   • Embed fiberglass mesh into the fresh layer to reinforce crack-prone areas.
   • Wait one day per millimeter of thickness before applying additional layers.
3. Finishing:
   • Create texture on the fresh surface by felting if desired.
   • When used as a topcoat, apply a hydrophobic paint for protection.

Precautions

• Apply at temperatures between +5°C and +25°C.
• Protect from direct sunlight, strong wind, or rapid drying conditions.
• Clean tools with water immediately after use.

Technical Data Sheet  MC 55W