Do I need to prime concrete before rolling resin?

Why Priming Concrete is Essential

Priming concrete before applying resin serves several important purposes. It seals the porous surface, reducing the risk of air bubbles and uneven absorption. More importantly, a good primer improves the adhesive bond between the concrete and the epoxy resin, leading to a longer-lasting, more uniform finish. This is particularly important on older or especially absorbent concrete surfaces, where direct application of resin might lead to patchiness or early delamination.

Choosing and Applying a Suitable Primer

Not all primers are the same, and it’s vital to select one compatible with both your concrete substrate and epoxy resin. Epoxyprimer is a reliable water-based, two-component epoxy system designed for use on concrete, tiles, screed, and timber. For best results, apply with a roller, brush, or spatula, aiming for smooth and even coverage without pooling. Allow adequate curing time—typically 24 to 48 hours—before rolling on your resin. This ensures the primer is fully set and ready to provide optimal adhesion for the topcoat.

When This Matters Most

• Large floors or high-traffic areas: Skipping the primer can jeopardise durability under regular use.
• Damp or uneven concrete: Priming acts as a barrier and helps prevent moisture issues beneath the resin.
• Professional finishes: A consistent, professional look is much easier to achieve on a well-primed substrate.