Should I Seal Wood Before Spreading Resin?

Why Sealing Wood Matters

Bare wood is naturally porous, which makes it prone to absorbing resin. This can lead to unsightly air bubbles forming as trapped air escapes, and cause the resin to soak into the wood, resulting in dull or uneven finishes. Applying a seal coat creates a barrier that helps minimise air bubbles and prevents excessive resin absorption. This not only improves the clarity and gloss of the final surface, but also promotes better adhesion between your project and the resin layer.

How to Properly Seal Your Wood

Start by lightly sanding the surface and removing dust. Next, apply a thin layer of epoxy resin—such as ‘Trasparente’ Multipurpose Clear Epoxy Resin—to the wood as a ‘seal coat’. Use a notched spatula or a brush to spread the resin evenly, ensuring all edges and pores are covered. Allow the seal coat to cure before pouring your main resin layer. For best results, choose a clear resin with good self-levelling and low viscosity properties.

Practical Tips for Best Results

• Seal before each major resin pour, especially on highly porous or open-grain woods.
• Avoid over-applying the seal coat; a thin, even layer is sufficient to block air and absorbency.
• Use appropriate tools such as a Tooth Shaped Spatula for smooth application and to reduce irregularities in your resin spread.