303 Mold and Mildew Cleaner and Blocker
Best dual-action solution for hot tub and sauna maintenance.
This dual-action spray is the ultimate shortcut for spa maintenance, tackling existing grime while creating a protective barrier against future growth. It trades the need for multiple specialized products for a single, effortless step that keeps your hot tub or sauna pristine with minimal elbow grease.
$12.79
at
Hottubthings
Who it's for
- Busy homeowners wanting to clean and prevent regrowth simultaneously
- Owners of delicate vinyl or plastic surfaces needing gentle care
- Users seeking a quick, low-effort maintenance solution
Who should skip it
- People tackling heavy, deeply embedded mold infestations
- Budget-conscious shoppers comparing costs per ounce
- Individuals sensitive to strong chemical smells
Performance breakdown
Cleaning Efficacy
Rapidly breaks down stubborn fungal growth on porous spa surfaces.
Preventative Longevity
Active barrier technology significantly delays the return of unsightly mildew.
Application Ease
Spray-and-wipe design makes routine maintenance quick and frustration-free.
Surface Compatibility
Safe for delicate acrylic and vinyl hot tub interiors.
Chemical Safety
Effective formula requires careful handling near sensitive spa water chemistry.
Odor Neutralization
Eliminates musty smells rather than simply masking them with fragrance.
Key Specs
Volume
16 fl oz
Product Form
Liquid
Application Method
Spray
Compatibility
Hot tub covers, cabinets, decks, and outdoor accessories
Chemical Purpose
Stain Remover
Kills mold and mildew
Yes
Know before you buy
Still have a question?
Ask Metto anything about the 303 Mold and Mildew Cleaner and Blocker before you decide.
