Weberprim EP 2K – Two-Component Epoxy Primer

Weberprim EP 2K is a water-based, transparent, rigid, two-component epoxy primer designed for professional surface preparation prior to waterproofing applications. It provides excellent adhesion on both absorbent and non-absorbent substrates, creating a reliable bonding layer for polyurethane waterproofing systems, sealants, and general waterproofing applications. Its ability to be applied on damp concrete surfaces makes it an outstanding choice among high-performance primers.

Key Advantages

• Excellent adhesion on absorbent and non-absorbent surfaces
• Suitable for polyurethane applications on damp concrete substrates
• Can be diluted with water for viscosity adjustment
• Resistant to various chemicals
• Reliable intermediate layer for polyurethane waterproofing systems
• Easy application with roller or brush
• Suitable for demanding waterproofing projects

Application Areas

Weberprim EP 2K is recommended for:

• Priming before polyurethane waterproofing applications
• Surface preparation before polyurethane sealant applications
• General waterproofing systems
• Critical areas requiring high adhesion performance, especially on damp surfaces

Suitable Substrates

Interior Floor Applications

• Glass
• Metal
• Existing ceramic tiles
• Bituminous surfaces
• Acrylic coatings

Mineral-Based Surfaces

• Cement-based smooth surfaces
• Screeds and renders
• Exposed concrete
• Wooden surfaces

For other substrates, technical consultation is recommended before application.

Surface Preparation

• The substrate must be clean, sound, smooth, and structurally stable
• Remove all contaminants that may affect adhesion using mechanical methods
• Uneven surfaces should be repaired with suitable weber.rep repair mortars
• Weak or loose sections must be removed before application
• Ensure the surface is free from dust, grease, and loose particles

Application Conditions

• Surface and ambient temperature: +5°C to +35°C
• Do not apply on extremely hot, highly humid, or freezing surfaces
• Do not use on frozen substrates
• Ensure adequate ventilation during application

Application Instructions

Mixing

• Mix Component A and Component B together for 3–4 minutes using a low-speed mixer
• Ensure material on the sides and bottom of the container is fully incorporated

Dilution

• If necessary, up to 20% clean water may be added to adjust consistency

Application

• Apply with a roller or brush in one or two coats
• Apply evenly across the entire surface

Polyurethane Application

• Polyurethane waterproofing products should be applied 6–10 hours after priming, while the primer surface remains slightly tacky
• Maximum waiting time between primer and coating applications is 24 hours

Consumption

• Approximately 100–200 g/m²
• Depending on substrate absorbency and the number of coats applied

Technical Specifications

Warnings and Recommendations

• Surface moisture content should not exceed 7%
• Concrete compressive strength should be at least 25 MPa
• Pull-off adhesion strength should be at least 1.5 MPa
• Ensure complete mixing of both components without leaving unmixed material on container walls
• Apply two coats on highly absorbent or fragile surfaces
• Keep away from ignition sources and open flames
• Wear protective gloves and safety goggles during application
• In case of contact, rinse thoroughly with plenty of water
• Ensure adequate air circulation in the application area

Storage

• Store in original unopened packaging
• Keep in a dry, cool, and well-ventilated environment
• Protect from direct sunlight and freezing conditions
• Shelf life is 12 months under recommended storage conditions

Frequently Asked Questions (FAQ)

1. Can Weberprim EP 2K be applied on damp surfaces?

Yes. It can be applied on damp concrete substrates and provides an excellent primer layer for polyurethane systems.

2. How many coats should be applied?

Depending on substrate conditions, one or two coats may be applied.

3. When should polyurethane waterproofing be applied?

Polyurethane products should be applied 6–10 hours after priming while the surface remains slightly tacky.

4. Can the product be diluted with water?

Yes. Up to 20% clean water may be added to adjust the consistency.

5. Is it suitable for wooden surfaces?

Yes. Weberprim EP 2K can also be applied to properly prepared wooden surfaces.