Okapox GF
Epoxy primer
- Solvent- and water-free formulation
- Suitable for critical and sensitive substrates
- Acts as a moisture barrier (sd-value = 200 m) and vapour barrier
- Serves as a binder for epoxy mortars and drainage screeds
- Compatible with Okapox Accelerator for fast-track installation workflows
- Certified with EMICODE EC 1Plus – for very low emissions, making it ideal for indoor air quality
- ⚠️ Note: This product does not replace waterproofing membranes in accordance with DIN EN 18533 / DIN 18534
Okapox GF is a 2-component, low-viscosity epoxy resin primer, formulated without solvents or water. It is designed for absorbent and non-absorbent substrates as a preparatory layer before levelling and installation work. The product serves as both a moisture barrier and a vapour barrier (sd-value = 200 m at, at least 0,5 mm thickness), making it suitable for subsequent installation of resilient elastic, textile and tile coverings, engineered wood flooring, and in areas exposed to high humidity, such as steam showers.
Typical Applications:
- Moisture barrier for cementitious substrates
- Vapour barrier in wet zones and steam-intensive environments
- Primer for calcium sulphate screeds and other sensitive subfloors
- Priming layer reinforced with Kiesel Alumino-Silicate glass fiber mesh for added stability
- Used as a binder in the preparation of epoxy-based mortars and screeds, e.g. for drainage systems
All substrates must be inspected and prepared in accordance with national standards and the current BEB data sheet (“Assessment and Preparation of Substrates”)¹.
- Apply a Kiesel levelling or patching compound at a minimum thickness of 2 mm.
- Ensure full system compatibility when combining with other Kiesel products.
Proper substrate preparation ensures optimal adhesion and long-term performance.
¹ Published by the German Federal Association for Screed and Coverings (BEB), the BEB data sheet outlines industry-standard procedures for evaluating and preparing substrates prior to flooring installation.
Mixing
- Open the base container A as well as the hardener container B. Pour comp. B into comp. A
- Mix both components thoroughly using an electric stirrer until the mixture is streak-free
- Decant the mixture into a clean container and remix to ensure complete homogenization
Application Methods
- Apply using a lambskin roller or TKB B1 trowel
- For moisture-sensitive substrates, apply a second coat or follow with Okatmos® EG 20 or UG 30
- As a moisture barrier, apply at 500 g/m², suitable for up to 7.0 CM-% residual moisture in concrete
Accelerated Curing
- Add 300 g of Okapox Accelerator per 3.5 kg Okapox GF
- Reduces curing time to approximately 3.5–4 hours
Epoxy Mortar / Drainage Screed
- For epoxy mortar: Mix 1 kg Okapox GF with up to 7 kg quartz sand (grain size 0.6– 1.2 mm)
- For drainage screeds: Mix in a 1:25 ratio with Kiesel DEZ additive
⚠️ Important: Always protect freshly applied layers from direct sunlight, heat, and air drafts. For exterior use (e.g., balconies, terraces), observe proper slope design, drainage layouts, and follow installation standards.
Reserved for professional installers.
| Use Case | Approx. Consumption (g/m²) | Approx. Coverage (ft²/kg) |
| Primer | 200–300 | 35.9 – 53.8 |
| Moisture barrier | 500 | 21.5 |
| With silica glass fiber mesh | 800-950 | 11.3 – 13.5 |
| As drainage mortar (per cm thickness) | 600-700 | 15.4 – 17.9 |
Values are approximate and depend on application technique and substrate condition.
Clean tools immediately after use using one of the following:
- Okamul WH Plus
- Ki CleanTex
- Ethanol or compatible solvents
| Description | Item No. | |
|---|---|---|
| 30 x 10 kg combined containers | 60480 | 4015705604800 |
| 45 x 5 kg combined containers | 60481 | 4015705604817 |
| 4 x 1 kg cans | 60482 | 4015705604824 |
| 40 x 25 kg bags Kiesel DEZ (25 kg additive) | 60332 | 401570560332 |
The aforementioned information, especially the proposals for processing and utilizing our product, is based on our knowledge and experience. We recommend that you carry out your own tests in every case to ensure the suitability of our products for the intended process and processing purposes because of the different materials and the working conditions which lie beyond our area of influence. No liability can be derived from this advice or from verbal advice, unless we are responsible for (criminal) intent or gross negligence in this respect.