Ajax vs Comet: Which Should You Use?
Ajax vs Comet: which scouring powder cleans sinks, tubs, and toilets better? Compare formulas, scratch risk, and value for everyday cleaning.
Quick Verdict
Comet has the edge for bathroom cleaning because its bleach content disinfects while scrubbing -- two jobs in one. Ajax is the gentler choice for surfaces where bleach could cause damage. For commercial cleaning at scale, bulk scouring compounds are more cost-effective than either retail brand.
Side-by-Side Comparison
Ajax
Pros
- Powerful scouring action on sinks, tubs, and countertops
- Available in both powder and liquid formulations
- Budget-friendly pricing at most retailers
- Effective on soap scum and general bathroom grime
Cons
- Can scratch porcelain, fiberglass, and glossy surfaces
- No bleach in standard formula (bleach version available separately)
- Can be harsh on skin with prolonged contact
- Not effective against rust or hard water mineral stains
Best For
General bathroom scrubbing of ceramic and porcelain sinks and tubs, removing soap scum, and light-duty surface scouring.
Comet
Pros
- Contains bleach for combined scouring and disinfecting
- Whitens surfaces while scrubbing stains away
- Effective against mold and mildew stains
- Strong performance on tough bathroom grime
Cons
- Bleach fumes require ventilation in enclosed bathrooms
- Higher scratch risk than Ajax on delicate surfaces
- Can discolor colored fixtures and grout
- Slightly higher price than Ajax powder
Best For
Bathroom disinfecting while scrubbing, whitening porcelain, mold and mildew stain removal, and toilet bowl cleaning.
When to Use Ajax
Use Ajax on colored fixtures, kitchen sinks, and surfaces where bleach would cause discoloration. Its bleach-free standard formula is safer for a wider range of materials.
When to Use Comet
Use Comet in bathroom tubs, toilets, and white porcelain sinks where you want simultaneous scouring and disinfecting. Its bleach content handles mold stains and whitening better than Ajax.
Our Verdict
Comet has the edge for bathroom cleaning because its bleach content disinfects while scrubbing -- two jobs in one. Ajax is the gentler choice for surfaces where bleach could cause damage. For commercial cleaning at scale, bulk scouring compounds are more cost-effective than either retail brand.
Choose Ajax when: General bathroom scrubbing of ceramic and porcelain sinks and tubs, removing soap scum, and light-duty surface scouring.
Choose Comet when: Bathroom disinfecting while scrubbing, whitening porcelain, mold and mildew stain removal, and toilet bowl cleaning.
Frequently Asked Questions
Related Comparisons
Clorox Toilet Bowl Cleaner vs Lysol Toilet Bowl Cleaner
Clorox vs Lysol toilet bowl cleaner: which eliminates stains and germs better? Compare formulas, effectiveness, and value for bathroom cleaning.
Read comparisonBathroomToilet Bowl Cleaner vs Bleach (Diluted)
Toilet bowl cleaner vs bleach: which keeps your toilet cleaner? Compare stain removal, disinfection, safety, and the best approach for sparkling toilets.
Read comparisonNeed cleaning supplies? Shop Soap-Man Products