Achieving Superior Adhesion to Concrete and Tiles for Resin Floors

Why concrete and tiles need different preparation

Concrete is porous but can hold dust, moisture and old sealers. Tiles are usually glazed and much less able to absorb a liquid coating. If a clear epoxy is poured directly onto either surface without a keying layer, adhesion can be uneven, and the resin may peel or lift once it cures.

A dedicated primer bridges that gap. On concrete it stabilises the surface and reduces the risk of outgassing. On tiles it creates a grippy film that the clear topcoat can hold onto, even on smooth ceramic.

The role of a water-based epoxy primer

A two-component water-based primer is designed to maximise bonding between the substrate and the resin coating. A product like Epoxyprimer is suitable for concrete, timber, ceramic tiles and screeds, and can be applied by roller, brush or spatula.

Because it is water-based and odourless, it is more comfortable to use indoors. Allow 24 to 48 hours at room temperature before applying the next resin layer.

When this matters most: surface preparation before coating

Even the best primer cannot compensate for a dirty or unstable floor. Start by removing loose material, grease, and old coatings. For ceramic tiles, degrease and lightly abrade the glaze if the manufacturer recommends it; for concrete, fill cracks and allow moisture levels to settle.

• Vacuum and wipe away all dust before priming.
• Mask edges and expansion joints to keep the resin system neat.
• Mix the primer exactly according to the stated ratio and avoid working in very cold or damp conditions.

Once the primer has cured, a clear epoxy such as “Icrystal” or “Trasparente” can be poured over the prepared surface, but the adhesion layer is what keeps the whole system in place.