KYK MegaFuga Rustik D106 | Rustic Grout for 4–20 mm Wide Joints

20/07/2026

KYK MegaFuga Rustik D106 | Rustic Grout for 4–20 mm Wide Joints

KYK MegaFuga Rustik D106 | Rustic Grout for 4–20 mm Wide Joints

KYK MegaFuga Rustik D106

Rustic appearance and technical performance for natural stone and decorative brick applications

KYK MegaFuga Rustik D106 is a cement-based, single-component grout specially formulated for wide joints ranging from 4–20 mm. Its polymer-modified composition provides flexibility, durability, and long-lasting performance. Suitable for both interior and exterior wall applications, it delivers an attractive rustic finish while ensuring excellent technical performance.

Product Description

  • Composition: Cement-based, polymer-modified
  • Suitable Joint Width: 4–20 mm
  • Key Feature: Rustic and natural surface appearance
  • Resistance: Resistant to water, frost, and sudden temperature changes

It creates a full, textured joint profile that enhances the architectural appearance of natural stone and decorative brick installations.

Applications

Interior Walls

  • Ceramic tile installations
  • Natural stone cladding
  • Decorative brick veneers

Exterior Walls

  • Ceramic tile applications
  • Natural stone systems
  • Decorative brick facades

Product Advantages

  • Rustic decorative finish: Creates a natural, authentic architectural appearance.
  • Low water absorption: Enhanced water resistance thanks to special additives.
  • High abrasion resistance: Provides long-lasting durability.
  • Weather resistant: Performs well against frost, moisture, and temperature fluctuations.
  • Flexible formulation: Reduces the risk of cracking in joints between 4–20 mm.

Important: Before application, ensure that all tile surfaces and joint spaces are completely free from oil, dust, dirt, and contaminants. For both vertical and horizontal applications, lightly dampen the joints to balance substrate absorbency.

Technical Specifications

PropertyValue
Chemical BaseCement-based, polymer-modified
Dry Density1.50 ± 0.05 g/cm³
Mortar Density1.95 ± 0.05 g/cm³
Maximum Grain Size≤ 600 μm
Available ColorsBeige, Grey, Black
Temperature Resistance-15°C to +80°C
Application Temperature+5°C to +30°C

Application Procedure

1. Surface Preparation

  • Tile installations should be completed at least 24 hours before grouting.
  • Allow the tile adhesive to cure completely.
  • Ensure surfaces are clean, dry, and dust-free.
  • Lightly moisten the joints before application.

2. Mixing

  • Water Ratio: 20–23% of powder weight
    • Approximately 4.0–4.6 liters of water per 20 kg bag
  • Mixing Equipment: Low-speed mixer (approximately 400 rpm)

Mixing Instructions

  • Mix until a smooth, lump-free consistency is achieved.
  • Let the mixture rest for 5–10 minutes.
  • Remix for 1–2 minutes before application.

3. Application

  • Apply using a grout float or grout gun.
  • Avoid spreading grout onto the tile surfaces.
  • Remove excess material using a soft spatula or damp sponge.
  • For decorative brick applications, the joint profile can be shaped with a rounded jointing tool.
  • Finish tooling before the grout fully hardens.

Environmental Conditions and Protection

  • Protect the surface from strong airflow during and after application.
  • Prevent water contact for the first 24 hours.
  • Do not apply on frozen surfaces or where frost is expected.
  • Avoid application under direct sunlight, excessive heat, or strong winds.
  • Do not apply during rainy weather. Protect freshly applied grout from rain for at least 24 hours.

Working Times

  • Pot Life: Maximum 1.5 hours
  • Initial Drying Time: Minimum 12 hours
  • Ready for Foot Traffic: 24–48 hours

Cleaning

Clean all application tools with water before the material hardens.

To protect the grout, use suitable cleaning products. Avoid aggressive chemicals such as bleach, hydrochloric acid, or acidic descalers.

Packaging, Storage & Shelf Life

  • Packaging: 20 kg kraft paper bag
  • Pallet Configuration: 60 bags (1,200 kg) – 80 × 100 cm pallet
  • Shelf Life: 12 months under proper storage conditions
  • Storage: Store in a dry, cool place between +5°C and +25°C, protected from direct sunlight. Reseal opened bags tightly after use.

Summary

KYK MegaFuga Rustik D106 combines rustic aesthetics with outstanding technical performance for natural stone and decorative brick applications. Designed for 4–20 mm wide joints, it offers low water absorption, high abrasion resistance, and excellent resistance to changing weather conditions, making it a reliable solution for both interior and exterior wall projects.

Frequently Asked Questions

1. What joint widths is it suitable for?

It is designed for joint widths between 4 mm and 20 mm.

2. Which surfaces can it be applied to?

It is suitable for interior and exterior wall applications with natural stone, decorative brick, and ceramic tile coverings.

3. What is the recommended application temperature?

Apply at ambient and surface temperatures between +5°C and +30°C.

4. What are the pot life and foot traffic times?

The pot life is up to 1.5 hours, and the surface can generally be opened to foot traffic after 24–48 hours.

5. How should the grout be cleaned?

Use grout-safe cleaning products. Avoid aggressive chemicals such as bleach, hydrochloric acid, and acidic cleaners, as they may damage the grout.