KRASO MICRO TIEFGRUND, Deep Penetrating Primer for Absorbent Surfaces | Strengthens & Stabilizes

KRASO MICRO Tiefgrund Deep Penetrating Primer for Absorbent Surfaces | Strengthens & Stabilizes.

A deep penetrating primer is the essential first step for achieving a professional and long-lasting finish on challenging surfaces. KRASO MICRO Tiefgrund is a high-performance, water-based acrylic primer, engineered in Sweden to expertly prepare interior and exterior mineral surfaces before painting, filling, or wallpapering. It is specifically formulated to address common issues like dusting, crumbling, and high absorbency, ensuring a perfect foundation for all subsequent coatings. Creating a stable and uniformly absorbent base enhances the final appearance and durability of your project while optimizing paint consumption.

The Benefits of a Professional Foundation

Using KRASO MICRO Tiefgrund provides a range of benefits that elevate the quality and longevity of your work.

• Foundation for Durability: Revitalize and Reinforce
  It penetrates deeply into weak or crumbling substrates, binding loose particles and strengthening the surface from within. This is crucial for older plaster or dusty concrete, transforming a fragile base into a solid foundation ready for finishing.
• Enhanced Adhesion for a Flawless Finish
  The primer acts as a powerful bonding agent between the substrate and the topcoat. It creates an ideal surface that promotes superior adhesion for paint, filler, wallpaper, and even tiles, significantly reducing the risk of peeling, flaking, or blistering over time.
• Optimized Paint Consumption
  Highly absorbent surfaces like new plaster, concrete, or gypsum board can draw excessive amounts of moisture and binder from paint, leading to an uneven finish and wasted material. MICRO Tiefgrund regulates and balances this absorbency, ensuring your topcoat spreads more evenly and covers a larger area, saving you both time and money.
• Effective Dust Binding
  Surfaces, especially after sanding, can hold fine dust that compromises adhesion. This primer effectively locks down and binds this residual dust, creating a clean, solid surface that is ready for the next application.
• Deep Penetration without a Surface Film
  Unlike surface-level sealers, MICRO Tiefgrund is entirely absorbed into the substrate without forming a glossy, non-porous film. This maintains the natural texture of the surface and ensures excellent compatibility with the finishing coat.
• Breathable Surface Protection
  Certified as Class I for water vapour permeability, this primer allows the substrate to breathe. This is vital for maintaining a healthy indoor climate and preventing moisture from becoming trapped within walls, which could lead to structural damage.

Technical Features and Certifications

KRASO MICRO Tiefgrund is designed to meet stringent professional standards, offering reliability and proven performance.

• Binder: Acrylic
• Colour: Clear
• Density: 1.01 g/cm³
• Material Consumption: 6–10 m²/l, dependent on surface absorbency and application method.
• VOC Content: Contains a maximum of 3 g/L (The EU limit value for this category (A/i) is 140 g/L), making it an exceptionally low-emission product.
• Drying Time: Dust dry in 1 hour. Re-paintable after 1–2 hours at standard conditions.
• Shelf Life: 2 years in an unopened container, stored in a frost-free environment.
• Producer: Hagmans Nordic AB, Sweden

Product Certifications and Standards:
KRASO MICRO Tiefgrund meets rigorous European and international standards, confirming its quality and safety for professional use.

• M1 Certification: This Finnish emission classification for building materials signifies very low emissions, contributing to better indoor air quality.
• BREEAM: The product is suitable for use in BREEAM certified buildings.
• CE Marked and Compliant with EN 1504-2: This standard specifies requirements for products used in concrete surface protection.

  • Reaction to Fire: Bfl-s1 (low flammability, minimal smoke production).

  • Water Vapour Permeability: Class I (highly vapour-open).

  • Capillary Absorption and Permeability to Water: w < 0.1 kg/m ²·h⁰·⁵ (excellent water resistance).

  • Adhesion Strength: > 2.0 N/mm² (superior bond strength).

How to Use KRASO MICRO Tiefgrund

For optimal results, please follow these structured steps for surface preparation and application.

Step 1: Surface Preparation
The surface must be clean, dry, solid, and free from contaminants such as dust, oil, or grease.

• Remove any loose or flaking paint mechanically.

• Clean surfaces previously coated with lime or chalk paint down to a stable base.

• If necessary, repair cracks or imperfections with a suitable filler, such as KRASO PROJEKT SPRAY or KRASO PROJEKT LH.

• Allow new concrete surfaces to cure for at least one week before priming. Remove any cement laitance (a weak top layer) by mechanical sanding or acid washing.

Step 2: Application Conditions
Ensure the air, surface, and primer temperature is above +5°C during application and drying. Avoid working in direct sunlight or strong drafts, as this can cause the primer to dry too quickly.

Step 3: Application Method
Stir the product thoroughly before use. If applying to a very dense or less absorbent surface, you may dilute it with a small amount of water.

• Apply the primer evenly using a brush, roller, or sprayer.

• Work the product into the surface to ensure it is thoroughly saturated and penetrates deeply.

• The goal is for the primer to be absorbed, not to form a shiny film on the surface.

• The surface will be ready for the next coat of paint or filler in approximately 1–2 hours.

For a comprehensive overview of all technical specifications and safety information, please consult the Product Technical Description document.