Zep Grout Cleaner and Brightener Review (2026)
By Nate Sawyer, Editor · Updated July 2026
DIYPicks is reader-supported. As an Amazon Associate and affiliate of home-improvement retailers, we may earn a commission when you buy through links on our site — at no extra cost to you. This never affects our recommendations.
- Grout
- Tile
- Stain removal
An acidic pro-strength grout cleaner that lifts set-in stains from white or colored grout around ceramic and porcelain tile with minimal scrubbing, working in a 2-3 minute dwell before you scrub and rinse. Because it's acidic it can etch natural stone like marble and travertine, so it is ceramic and porcelain only, and needs gloves and ventilation.
Pros
- Acidic pro-strength formula lifts set-in grout stains with minimal scrubbing
- Works on both white and colored grout around ceramic and porcelain tile
- Fast to use - apply, wait 2-3 minutes, scrub and rinse
Cons
- Acidic, so it can etch natural stone (marble, travertine, limestone) - ceramic/porcelain only
- Strong fumes require gloves and ventilation, plus a thorough rinse afterward
- A spot/grout treatment, not an everyday whole-floor cleaner
Specifications
| Type | Tile & grout cleaner / brightener |
|---|---|
| For | Ceramic & porcelain tile grout (not natural stone) |
| pH | Acidic |
| Dwell | ~2-3 min, then scrub and rinse |
| Best for | Restoring stained, discolored grout lines |
Frequently Asked Questions
- How do you use Zep Grout Cleaner and Brightener?
- Apply it to the grout lines, let it dwell about 2-3 minutes, then scrub and rinse thoroughly. The acidic formula does most of the work in that dwell time, so resist the urge to scrub immediately - and rinse properly afterwards rather than leaving acid residue on the floor.
- Can you use it on marble or travertine?
- No. It is acidic and will etch natural stone including marble, travertine and limestone. It is for ceramic and porcelain tile grout only. This is the one mistake with this product that cannot be undone.
- Does it work on colored grout, or only white?
- Both. It is formulated for white and colored grout around ceramic and porcelain tile, so it brightens rather than bleaching to white. As with any grout treatment, test an inconspicuous corner first if your grout is a strong color.
- Is this something you use for regular floor cleaning?
- No - it is a spot and grout restoration treatment, not an everyday whole-floor cleaner. The strong fumes also mean gloves and ventilation are genuinely required, which is not how anyone wants to mop weekly.