White aluminum oxide for car glass polishing

White aluminum oxide powder is an excellent choice for car glass polishing due to its fine abrasive properties, high purity, and ability to produce a smooth, scratch-free finish. Here’s how it’s used and what makes it ideal:


Why White Aluminum Oxide for Car Glass Polishing?

  1. Controlled Abrasiveness

    • Hard enough (Mohs 9) to remove scratches, swirl marks, and water spots without damaging the glass.

    • Softer than silicon carbide or diamond, reducing the risk of over-cutting.

  2. High Purity (99.6%+ Al₂O₃)

    • Low iron content prevents staining or discoloration on glass.

    • No impurities that could cause secondary scratches.

  3. Fine & Uniform Particle Size

    • Available in ultra-fine grits (e.g., F800-F2000+ or micron grades 3µm-15µm) for mirror-like finishes.

    • Works well in cerium oxide-based glass polish compounds as a supporting abrasive.

  4. Chemical Stability

    • Does not react with water or polishing oils, ensuring consistent performance.

How It’s Used for Car Glass Polishing

1. Scratch & Defect Removal

  • Mixed with a glass polishing compound (e.g., Cerium Oxide blend) to enhance cutting efficiency.

  • Applied with a felt or foam polishing pad on a rotary or DA polisher (speed: 1000-2000 RPM).

2. Final Finishing

  • For ultra-fine polishing, sub-micron white aluminum oxide (0.5µm-3µm) is used to eliminate haze.

  • Often combined with lubricants (water, oils) to prevent heat buildup.

3. Windshield Restoration Kits

  • Some professional-grade kits include white aluminum oxide-based pastes for deep scratch repair.

Recommended Grit Sizes for Car Glass

ApplicationGrit Size (FEPA/µm)Use Case
Heavy Scratch RemovalF600-F800 (~15-25µm)Deep scratches, wiper marks
Medium PolishingF1000-F1200 (~8-12µm)Moderate defects, haze removal
Fine FinishingF1500-F2000 (~3-5µm)Final gloss enhancement
Ultra-Smooth Finish<1µm-3µmJewelry-grade clarity

Comparison with Other Glass Polishing Abrasives

AbrasiveProsCons
White Aluminum OxideBalanced cut, safe for glass, affordableSlower than diamond
Cerium OxideBest for glass, fast cuttingExpensive, can cake if not mixed properly
Diamond PowderExtremely fast cuttingRisk of over-polishing, costly
Silicon CarbideAggressive cuttingToo harsh for fine glass work

Send your message to us:

Scroll to Top