How to Sand Epoxy Countertops for a Glossy Finish (400, 800, 1200, 2000 Grit Step-by-Step Guide)

Epoxy countertops are a stunning option for kitchens and bathrooms, providing a glossy, durable surface. However, imperfections such as bubbles, uneven textures, or cloudy spots often appear after curing. Sanding is the key to leveling and preparing epoxy for a flawless high-gloss finish. In this guide, we’ll explain how to sand epoxy countertops properly using 400, 800, 1200, and 2000 grit sandpaper for crystal-clear results.

Why Sanding Epoxy Countertops Matters

Even well-poured epoxy can develop minor flaws. Sanding eliminates imperfections, smooths uneven layers, and allows polishing to restore clarity. Skipping this step leaves epoxy looking cloudy or textured.

Benefits of sanding epoxy countertops include:

• Smooth surface: Removes bumps, bubbles, and high spots.
• Clarity: Refines epoxy to a glass-like transparency.
• Durability: Ensures a strong finish resistant to scratches and stains.
• Professional look: Makes countertops appear polished and flawless.

Choosing the Right Grits

• 400 grit: Initial sanding to flatten high spots and imperfections.
• 800 grit: Refines scratches left by coarse sanding.
• 1200 grit: Creates a smooth, semi-polished surface.
• 2000 grit: Prepares epoxy for final polishing compounds.

Tools and Materials You’ll Need

• Wet/dry sandpaper: 400, 800, 1200, and 2000 grits.
• Orbital sander: Speeds up sanding on large countertop areas.
• Sanding block: For even hand-sanding on edges.
• Spray bottle with water: Keeps surface cool and dust-free.
• Polishing compound: Restores a glossy, mirror-like finish.

Step-by-Step Sanding Guide

1. Start with 400 grit. Use 400 grit (100-pack) to remove bubbles, drips, or uneven textures. Always wet sand to avoid heat damage.
2. Refine with 800 grit. Switch to 800 grit (25-pack) to smooth scratches and prepare for finer sanding.
3. Smooth with 1200 grit. Apply 1200 grit (50-pack) for a semi-polished finish that feels even and sleek.
4. Finish with 2000 grit. Use 2000 grit (25-pack) to refine the epoxy until it’s satin-clear and ready for polishing compounds.
5. Polish. Apply a countertop polishing compound with a soft pad or buffer to achieve full gloss.

Special Considerations

Thick epoxy layers: May require extra time at 400 grit to level properly.

Colored epoxy: Sand carefully—aggressive sanding can dull pigments.

Edges and corners: Hand sand to maintain sharp lines without over-rounding.

Pro Tips

• Always wet sand to prevent scratches and dust.
• Sand in alternating directions at each grit to track progress.
• Clean thoroughly between grits with a tack cloth or microfiber.
• Polish immediately after sanding for maximum clarity.
• Replace clogged sandpaper quickly to avoid uneven sanding.

Aftercare for Epoxy Countertops

• Apply a countertop sealer after sanding and polishing for added durability.
• Clean with non-abrasive cleaners only.
• Re-polish as needed to maintain gloss.

FAQs

• Can I skip 1200 grit? Not recommended—each stage builds toward clarity.
• Do I always need a buffer? Hand polishing works for small counters, but buffers give the best results.
• Why does my epoxy look cloudy after sanding? It needs to progress through finer grits and polishing to restore clarity.
• Can I dry sand epoxy? No—heat buildup can soften or damage epoxy. Always wet sand.

Watch & Learn

Shop epoxy countertop sanding sheets: Get 400, 800, 1200, and 2000 grit sandpaper in convenient packs. Shop super fine sandpaper.

Closing Thoughts

Sanding epoxy countertops may take time, but it’s the only way to achieve that flawless, glossy finish. By following the grit sequence of 400 → 800 → 1200 → 2000, you’ll eliminate imperfections and prepare the surface for polishing. With patience and proper sanding, epoxy countertops can look like polished stone or glass, adding beauty and durability to your home.