Quick Answer
CarPro CeriGlass is a cerium-oxide glass polish that removes etched water spots, wiper marks, and haze that ordinary glass cleaner simply can't. Work it into the glass by hand or with a machine and a glass pad, then seal the surface with a hydrophobic glass coating so it stays clear.
There's a point where a glass cleaner stops working — the water spots won't wipe off, the windshield hazes in low sun, and wiper marks streak across your view. That's because those defects are etched into the glass, not sitting on top of it. To remove them you have to polish the glass, and that's exactly what CarPro CeriGlass is for.
If your glass just needs cleaning, reach for a dedicated glass cleaner first (see our best glass cleaner guide). But when cleaning isn't enough, CeriGlass is the fix.
What CarPro CeriGlass Actually Does
CeriGlass uses professional-grade cerium oxide abrasives to restore optical clarity to windshields and automotive glass. It removes stubborn water spots and mineral deposits, eliminates wiper marks and light scratches, and clears the surface contamination that regular glass cleaners can't touch. The result is glass that's genuinely clear again — not just clean.
The Polish · Cerium Oxide
CARPRO CeriGlass Polish 500ml (17oz) — $29.99
A professional cerium-oxide glass polishing compound that removes water spots, mineral deposits, wiper marks and light scratches, restoring optical clarity to windshields. Use by hand or with a machine and glass pad.
Shop NowHow to Polish Glass with CeriGlass (Step by Step)
1. Clean the glass first. Wash and dry the glass, then wipe it down with a streak-free glass cleaner so you're polishing the defect, not grinding in grit.
2. Load your pad. Shake the bottle and apply a small amount of CeriGlass to a damp glass polishing pad or a folded microfiber. A little goes a long way.
3. Work it in. Polish small sections with firm pressure in overlapping passes. Keep the polish and the glass damp — a light mist of water as you go keeps it cutting and stops it drying out.
4. Buff and inspect. Wipe the residue with a clean microfiber and check the glass in good light. Stubborn water spots may need a second pass — etching can be deep.
Pro Tip
CeriGlass cuts by friction, so heat and dwell time matter. Keep the surface damp, work an area no bigger than a foot or two at a time, and don't expect one quick pass to erase years of hard-water etching. For a whole windshield or heavy etching, a machine is far faster and more consistent.
By Hand vs By Machine
By hand is perfect for a few water spots or a small patch of wiper haze. For an entire windshield, severe etching, or to save your arms, use a machine polisher with a dedicated glass polishing pad — glass is far harder than paint, so a rotary or a forceful DA with a glass-specific pad does the real work. The CeriGlass kit is a tidy way to start.
Starter Size
CARPRO CeriGlass Polish Kit (150ml) — $21.99
The same cerium-oxide CeriGlass polish in a smaller kit format — a low-commitment way to tackle a windshield's worth of water spots and wiper marks.
Shop NowClean Before, Protect After
Polish only does half the job. Clean the glass before and after with an ammonia-free cleaner that's safe for tint and coated glass, then lock in your freshly clear glass with a hydrophobic coating so rain beads and sheets off at speed — and the spots don't come back as fast.
Clean · Ammonia-Free
CARPRO Clarify Glass Cleaner 500ml (17oz) — $14.99
A streak-free, ammonia-free glass cleaner that's safe for window tint and ceramic-coated glass — use it before polishing and as the final wipe-down after.
Shop Now
Protect · Hydrophobic
CARPRO DQUARTZ GForce Glass Coating 50ml — $89.99
A professional ceramic glass coating that makes water bead and sheet off the windshield at highway speed, improving wet-weather visibility and slowing how fast water spots return.
Shop NowFrequently Asked Questions
Will CeriGlass remove deep scratches from glass?
It removes wiper marks, light scratches, and etched water spots. Deep gouges you can catch with a fingernail are usually too deep to polish out safely — CeriGlass is for surface defects and haze.
Can I use CeriGlass by hand?
Yes, for small areas and a few spots. For a whole windshield or heavy etching, a machine polisher with a glass pad is much faster and more even.
Is it safe on tinted or coated glass?
CeriGlass is an abrasive polish for bare exterior glass — don't use it on the inside of tinted windows (the film is on the inside). For cleaning tint and coated glass, use an ammonia-free cleaner like CarPro Clarify instead.
How do I keep water spots from coming back?
Seal the polished glass with a hydrophobic glass coating, dry the car after washing, and avoid letting sprinklers or hard water dry on the glass. Protection slows etching dramatically.
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