Should You Sand Between Resin Coats on Wood?

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Why Sand Between Resin Coats When Layering on Wood?

When pouring resin into wood in multiple layers, sanding between coats is a simple step that can make a big difference to the overall finish. This ensures strong adhesion and a smooth, professional result for your wood and resin projects.

Why Sand Between Resin Layers?

Each cured resin layer can form a very smooth surface that the next pour may struggle to grip. Lightly sanding between coats creates a fine texture, helping subsequent resin layers bond firmly. This is especially important for layered pours typical in deep resin river tables or complex designs, where cure time exceeds the ideal chemical bonding window.

How to Sand for Consistent Results

Wait until the resin layer is fully cured and no longer soft or tacky.
Use fine-grit abrasive paper (typically 320–400 grit) and gently sand the surface to create a matt finish.
Remove all dust with a tack cloth or damp (lint-free) cloth before the next pour.

Take care not to over-sand the wood edges, as this can affect the final shape. If you’re starting out, using a kit such as the River-Table Complete Kit provides step-by-step guidance and the materials you need for smooth, bonded layers.

When This Matters Most

Sanding is crucial if layers are poured more than 24 hours apart, or when pouring thick, deep projects where a single pour isn’t possible. Skipping this step can lead to weak joins that may eventually separate or look cloudy.

Related guides

How Do You Pour Resin Into Wood

For a flawless, long-lasting finish when pouring resin into wood, never skip sanding between layers. Discover more helpful techniques on our main guide to pouring resin into wood.