Sand Epoxy Countertops: 220?400?800?1500 Grit

Epoxy countertops cure hard and glossy, but imperfections like dust nibs, bubbles, or uneven spots often appear. To achieve a smooth, professional finish, sand with 220 ? 400 ? 800 ? 1500 grit before polishing. This process evens out the surface and prepares it for a mirror-like shine.

Why Sand Epoxy

Even with careful pouring, epoxy can cure with ridges or surface flaws. Sanding removes these irregularities and ensures clarity after polishing. Without sanding, imperfections remain visible through the finish.

Tools & Materials

• 9×11 in wet/dry sandpaper sheets: 220, 400, 800, 1500 grit
• Orbital sander or sanding block
• Spray bottle with water
• Polishing compound for epoxy or stone
• Buffing pad or microfiber cloth
• PPE: gloves, respirator, safety glasses

Recommended Grit Sequence

• 220 grit — Levels ridges, bubbles, or uneven spots.
• 400 grit — Smooths scratches left by coarse sanding.
• 800 grit — Refines surface toward clarity.
• 1500 grit — Prepares for final polish, satin-like sheen.

Step-by-Step: Epoxy Countertop Sanding

1. Prep surface. Clean thoroughly to remove dust and grease.
2. Sand with 220 grit. Start with 220 grit (25-pack) to flatten high spots and imperfections.
3. Step to 400 grit. Switch to 400 grit (50-pack). Smooth out visible scratches.
4. Refine with 800 grit. Use 800 grit (100-pack) for semi-clear surface.
5. Final sanding at 1500 grit. Finish with 1500 grit (25-pack). Surface should now be smooth and satin-like.
6. Polish. Apply compound with buffing pad until high-gloss finish appears.
7. Seal. Optionally apply food-safe sealer for added durability.

Special Cases

Colored epoxy: Sand lightly—don’t burn through pigment layers.
Deep pours: Allow full cure (at least 7 days) before sanding.
Heavy scratches: Start coarser (120 grit) before moving to 220.

Pro Tips

• Always sand wet—epoxy dust is hazardous.
• Move sander slowly—fast passes leave swirl marks.
• Replace sheets frequently—epoxy clogs grit quickly.
• Don’t skip grits—imperfections remain visible in final gloss.
• Finish with compound designed for resin or stone.

Aftercare

• Clean counters with mild soap and microfiber cloths.
• Re-polish as needed when surface dulls.
• Avoid cutting directly on epoxy—use cutting boards.

FAQs

• Can I stop at 800 grit? Only for matte finish—gloss requires 1500 + polish.
• Why not go beyond 1500 grit? Polishing compound handles higher clarity better.
• How long does sanding take? Typically 1–2 hours for a standard countertop.
• Will sanding weaken epoxy? No—removes only surface microns if done correctly.

Video: Epoxy Countertop Sanding

Closing: Epoxy countertops achieve a professional, glass-like finish with 220 ? 400 ? 800 ? 1500 grit sanding followed by polish. Patience ensures stunning, durable results.