Do You Need to Sand Between Coats of Brushed Epoxy Resin?

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Do I Need to Sand Between Coats of Brushed Epoxy Resin?

A smooth, strong finish with epoxy resin often depends on the way each layer is applied. If you’re adding several coats by brush, you may be wondering if sanding is necessary between them. Here’s what to consider to ensure the best results for your project.

Why Sanding Between Coats Is Important

Each layer of epoxy resin forms a hard, glossy surface when it cures. Applying a fresh layer on top of this glossy coating without preparation can lead to poor adhesion, as the new resin struggles to grip the surface. A light sanding creates a subtle texture, allowing the next layer to bond securely rather than simply sitting on top.

How to Sand Between Resin Layers

After allowing the previous layer to cure fully—always follow your resin’s recommended curing time—use fine-grit sandpaper (generally 320–400 grit is suitable) and gently sand the entire surface. Avoid pressing too hard to prevent scratches or gouges. Once the surface feels evenly matte, remove all dust with a lint-free cloth or vacuum before brushing on the next coat. This will help avoid trapped particles and ensure a clear, sleek finish for your next layer.

Choosing the Right Brush for Layering

Selecting a suitable brush will make a noticeable difference in the quality of your finish and the ease of layering. Products like the Reusable Silicone Resin Brush for Epoxy Art and Wood Applications offer precision and are easy to clean between coats, minimising contamination between layers.

When This Matters Most

Sanding is especially important for projects where durability and clarity are key—such as tabletops, artwork, or any item that will see regular use or close inspection. For quick repairs or hidden layers, you might get away with minimal sanding, but for a professional result, it’s a step best not skipped.

Related guides

How To Apply Epoxy Resin With A Brush

Ensuring strong adhesion between resin layers helps achieve a flawless, lasting finish. For more advice on application techniques, visit our main guide on how to apply epoxy resin with a brush.