• Organic resin for strengthening and waterproofing substrates
  • Suitable for indoor and outdoor applications
  • Very low VOC emissions and solvent-free
  • Reinforces heated and absorbent substrates
  • Effective as a moisture barrier up to 5% residual moisture content
  • Organic resin for strengthening and waterproofing substrates
  • Suitable for indoor and outdoor applications
  • Very low VOC emissions and solvent-free
  • Reinforces heated and absorbent substrates
  • Effective as a moisture barrier up to 5% residual moisture content
Kerakoll EP21
Kerakoll EP21
Kerakoll EP21 3500 ml
Kerakoll EP21 3500 ml
Kerakoll

Kerakoll EP21

Kerakoll EP21 is a sustainable, organic resin product for consolidating and waterproofing absorbent substrates with very low VOC emission.

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117,45
33,56/l
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Kerakoll EP21: Sustainable Resin for Substrate Consolidation

What is Kerakoll EP21?

Kerakoll EP21 is a certified organic resin product developed for consolidating and waterproofing absorbent and mineral substrates. It is a 2-component system with very low emissions of volatile organic compounds (VOC) and contains no solvents, making it a safe choice for both users and the environment. EP21 is specially designed for spaces with limited air circulation and is suitable for both indoor and outdoor applications. It provides excellent protection against residual moisture, making it ideal for reinforcing heated substrates and safely laying parquet on substrates with high residual moisture content of up to a maximum of 5% CM.

How does Kerakoll EP21 work?

Kerakoll EP21 is supplied as a 2-component system (part A and part B) that must be mixed in a ratio of 2.5:1. Before application, the mixture should be well stirred until a homogeneous product is obtained. EP21 can be applied in various ways, depending on the purpose: as a dust-binding primer, deep fixer, or impregnating agent. Depending on the absorption rate of the substrate, the product can be diluted with Keragrip Eco Pulep and applied evenly with a brush or roller. For applications on substrates that do not guarantee full absorption of EP21, the fresh product layer should be sprinkled with Quarzo 5.12 to ensure optimal adhesion.

Benefits and Features

Kerakoll EP21 offers many benefits, such as high consolidation capacity and excellent performance on both highly absorbent and low absorbent substrates. The product is suitable for both civil and commercial use, indoors and outdoors. Thanks to its very low VOC emissions and the absence of solvents, it is safe for users' health and contributes to a healthy indoor climate. EP21 is ideal for strengthening heated substrates and can serve as a moisture barrier against residual moisture up to 5% CM. The product is easy to use, has a long shelf life, and is compatible with various types of adhesives, including organic mineral reactive adhesives.

Instructions for Use

Prepare the substrate by making it clean, dry, dimensionally stable, and free of substances that may negatively affect adhesion. Mix parts A and B in the correct ratio (2.5:1) with an electric mixer at low speed until a homogeneous mixture is achieved. Apply EP21 with a brush or roller, depending on the purpose and specifications. If used as an impregnating agent, apply a diluted layer first, followed by a second undiluted layer after the first one has dried. Ensure adequate ventilation during and after use, and clean tools immediately with Diluente 01 to prevent curing. After complete curing, the product can only be removed mechanically.

Maintenance or Advice

Kerakoll EP21 is a professional product that must be used strictly according to applicable standards and regulations. Avoid direct sunlight and extreme heat, and use the product only within the recommended temperature range of +10°C to +35°C. If more than 30 hours must pass before a subsequent layer is applied, the surface must be sanded to ensure adequate adhesion. If in doubt or for further questions, please contact Kerakoll Worldwide Global Service for detailed advice and support.

  • Organic resin for strengthening and waterproofing substrates
  • Suitable for indoor and outdoor applications
  • Very low VOC emissions and solvent-free
  • Reinforces heated and absorbent substrates
  • Effective as a moisture barrier up to 5% residual moisture content

We strive to handle your order with the utmost care and ship it as quickly as possible. Orders placed on weekdays before 12:00 PM are usually shipped the same day. However, situations may arise where this is not feasible, for example, when a product is out of stock. In such cases, we guarantee that your order will be shipped within 3 working days. If there are delays, we will inform you. Please note that all prices on our website are exclusive of shipping costs.

Shipping costs:

  • Free shipping for orders from:
    • €185: Ireland
  • Standard shipping costs:
    • Ireland: €24.95

Delivery: Your order will be delivered by PostNL, DHL, or DPD. While we do our best to ship orders on the same day, we cannot guarantee an exact delivery time.

FAQs

Kerakoll EP21 is a certified organic resin for consolidating and waterproofing absorbent substrates, such as cement screeds with high residual moisture content (up to 5%). It is ideal for both indoor and outdoor use and improves the mechanical resistance of substrates.
Kerakoll EP21 is suitable for mineral screeds, cement screeds, anhydrite screeds, and heated screeds. It is designed for civil and commercial use.
No, Kerakoll EP21 is not suitable for use on non-absorbent substrates like marble or ceramic. It is specifically developed for absorbent substrates.
Kerakoll EP21 is applied with a roller or brush. Depending on the application, it can be diluted with Keragrip Eco Pulep up to 15-30% and evenly distributed. If necessary, the still-wet surface should be sprinkled with Quarzo 5.12 to enhance adhesion.
The drying time between layers varies from about 4 to 12 hours, depending on environmental conditions. The waiting time before applying a next product is about 24 hours.
Yes, Kerakoll EP21 can be used as a moisture barrier against residual moisture up to 5% CM. The product protects parquet and other floors from moisture from the substrate.
Substrates must be clean, dry, dimensionally stable, and free of cracks and substances that may affect adhesion. For good adhesion, compact, low-absorbent substrates should be roughened.
Yes, Kerakoll EP21 is a solvent-free product with very low emissions of volatile organic compounds (VOC). It contributes to a healthy indoor climate and is safe for users' health.
Kerakoll EP21 is available in a set consisting of a 2.5 kg jerrycan (Component A) and a 1 kg bottle (Component B). The shelf life is approximately 12 months in the original, unopened packaging.
You can buy Kerakoll EP21 directly from us via our webshop, where we offer a wide range of construction products and resins.
Product Information Sheet