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Epoxy Coating Systems

EP Primers: Epoxy resin for priming, scratch coating and leveling filler

WEBAC epoxy primer is suitable as primer, scratch primer and leveling finish
Epoxy primers from WEBAC provide resistant bonding layers for oily, damp and slightly absorptive substrates. Our primers and coatings are compatible with concrete, steel, masonry mortar, foil and cable sheathing. Epoxy primers, epoxy mortars and special EP primers from WEBAC are also resistant to diluted acids and lyes. The same applies to lubricants, oils and fuels. 

Preparatory work

Structural analysis: 

  • Inspection of the substrate Moisture condition (dry, damp or wet)
    • Surface strength (> 1.5 N/mm²)
    • Concrete quality 
    • Condition of the surface (soiled, oily)
  • Observe dew point

This provides information on: 

  • Selection of suitable primer and coating 

The substrate must be open-pored, dry and free of dust and oil; if necessary, pre-treat the substrate.


The amount of epoxy primer or epoxy mortar applied and its inherent temperature influence the workable life. Higher temperatures speed up and lower temperatures slow down the reaction. The curing time is influenced by the layer thickness and the temperature of the building structure. The curing time is longer at low temperatures of the building structure. WEBAC primer and coating may only be applied in pure form – without any residues from cleaning agents or other foreign matter.

Apply WEBAC epoxy resin primer to the substrate by brush, roller or squeegee. Apply the material evenly covering the entire surface, avoiding puddle formation. It depends on the substrate's absorbency whether one or several applications are necessary. The primer must be worked in thoroughly on oily substrates. The epoxy resin primer must fill all pores and cavities in the surface. It is not necessary to scatter stoved quartz sand onto the primer if it is overcoated within 24 hours.

Scratch coating and leveling filler
When using WEBAC epoxy resin as bonding finish, leveling finish or scratch mortar, first fill the material with stoved quartz sand. Then mix well and distribute the mixture on the surface by trowel, blade or squeegee immediately after mixing. The material can be additionally rendered thixotropic by adding the set-up agent WEBAC® ST200 or WEBAC® ST300 when working on sloping or vertical surfaces. If necessary, vent the bonding and leveling finish with a porcupine roller. In addition, it is recommended to scatter stoved quartz sand on the finish.



Clean the equipment with WEBAC® Cleaner A any time work is interrupted for a longer period of time and after use Never use WEBAC® Cleaner A for diluting products; avoid mixing with the coating material Use WEBAC® Cleaner B for etching all material already cured. Observe the technical data sheets of the cleaners used.