Should I Sand Between Resin Layers?

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When working on a 3D resin wall, achieving a smooth, professional result often depends on your preparation between layers. One commonly asked question is whether it’s necessary to sand between resin applications. Here’s what you should know for best results.

Why Sanding Between Layers is Important

Light sanding after the previous resin layer has fully cured is vital for creating an ideal bonding surface for the next coat. This process gently scuffs and evens out any minor bumps, improving both the texture and adhesion of subsequent resin layers. Skipping this step can lead to visible seams or peeling over time—especially on textured or vertical 3D walls where adhesion is key to durability.

How to Sand Resin Between Layers

Use fine-grit sandpaper (usually between 320–600 grit) and sand the cured resin lightly by hand or with a sanding block. The goal is to dull any glossy surface without removing too much material. Afterwards, wipe away all dust with a damp cloth and ensure the surface is completely dry before your next application. Products like the Vertical Glass Thick Resin Decorative Wall Coating are best sanded once fully hardened (typically after 48 hours) for optimal results.

When This Matters Most

Building up multiple textured or coloured effects on a 3D wall
Repairing uneven areas between resin coats
Switching to a different type of resin or decorative technique for additional layers

Related guides

How Do You Create A 3d Wall Using Resin

Taking the time to lightly sand between cured resin layers helps maintain the quality and longevity of your 3D wall creations. For more on building stunning vertical resin features, visit our main guide on how to create a 3D wall using resin.