Suitable Surfaces for Epoxyprimer

Compatible substrates at a glance

Epoxyprimer is formulated for four main surface types. The common requirement is that each one is dry, clean and structurally sound before the primer is applied.

• Concrete – Suitable for new and existing floors after removal of dust and any surface contaminants.
• Screeds – Works well when fully cured and free from loose material; coverage varies with porosity.
• Ceramic tiles – Can be primed after thorough cleaning and degreasing to help the coating bond to the surface.
• Timber – Suitable for prepared timber substrates, including sanded and cleaned boards that are dry and stable.

How to assess surface preparation

Before applying Epoxyprimer, check that the substrate is dry and has no visible moisture or contamination. A simple wipe test can reveal dust or grease that would weaken the bond. The product is applied by roller, brush or spatula, and its consumption rate typically ranges from 100 to 300 g/m² depending on how porous the surface is.

For absorbent concrete or screed, higher consumption may be needed to seal the surface evenly. Dense or low-porosity substrates such as some ceramic tiles generally sit at the lower end of that range. Always allow the primer to cure fully — usually 24 to 48 hours — before overcoating.

When this matters

Choosing the right primer becomes especially important when you are coating old ceramic tiles or timber that would otherwise struggle to hold an epoxy layer. A primer that matches the substrate reduces the chance of the coating lifting, which directly affects how well the finished floor resists dust and wear.

In industrial and high-traffic settings, a stable primer layer also helps maintain the sealed surface that keeps concrete dust from becoming airborne. If you are switching between substrates within the same floor area, check that each section is prepared consistently before priming.