Zep Grout Cleaner and Brightener Review (2026)
By The DIYPicks Team · 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
A cheap, fast acid brightener that makes dingy ceramic-tile grout look new - keep it off marble and other natural stone.
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 |