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Before pouring a new layer of epoxy resin, ensuring that the existing surface is properly prepared is essential. Sanding plays a key role in this step, helping to create a smooth, effective base for excellent adhesion and a flawless finish.
Why Sanding is Important
Sanding removes surface imperfections, dust, and minor blemishes, leaving behind a slightly roughened texture that helps the new resin layer grip to the substrate. Without sanding, new resin may not bond fully, increasing the risk of delamination or visible defects. The process also minimises trapped air and improves overall clarity and finish, which is particularly crucial if you’re aiming for a professional-looking project.
Recommended Sanding Tools and Techniques
For resin and wood surfaces, using suitable abrasives is advised. The “Ebonite Abralon” sanding pads are ideal for smooth yet consistent finishes, while the Dry Sanding Discs Kit offers a range of grits for both shaping and polishing your surface. Start with a coarse grit to remove larger imperfections, then move to finer abrasives to achieve an even texture. Clean the surface thoroughly afterwards to eliminate sanding residue before your next pour.
When This Matters Most
Sanding is especially important in between multiple resin layers, or when recoating projects that have cured for more than 24 hours. It’s also crucial if you notice bubbles, dust, or other marks on the previous layer, as these can telegraph through subsequent pours if not addressed properly.
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Making sanding a regular part of your epoxy resin preparation routine ensures improved adhesion, durability, and a superior final result. For full guidance on priming and surface repair techniques, return to the main surface preparation guide.