303 Mold Mildew Stain Remover
Best deep cleaner for homeowners tackling stubborn bathroom mold and mineral buildup.
Eliminate stubborn mold, mildew, and hard water stains with 303 Mold Mildew Stain Remover. This powerful 16oz liquid formula comes in a convenient spray bottle for easy application. Simply spray directly onto the affected area, let it sit for a few minutes, then scrub or wipe clean and rinse thoroughly. It's an essential tool for maintaining clean and fresh bathrooms and other damp areas prone to moisture buildup. Always follow the first aid instructions and keep out of reach of children.
$12.99
Owner Satisfaction
4.6
/ 5
Category Rank
22
/ 261
#22 in Tub & Tile Cleaners
Price vs Category Average
-56%
Below average
Form
Liquid
/ Liquid
Who it's for
- Users preferring a straightforward, ready-to-use cleaning solution
- Busy homeowners needing quick results without heavy scrubbing
- Boat owners and decorators cleaning delicate, non-bleach surfaces
Who should skip it
- People dealing with severe, deeply embedded mildew stains
- Individuals sensitive to strong chemical fumes
- Budget-conscious shoppers looking for lower-cost generic alternatives
Performance breakdown
Mold eradication
Aggressive formula cuts through deep-set fungal growth with minimal effort.
Hard water efficacy
Dissolves stubborn mineral deposits that typically plague shower glass and tile.
Application convenience
The spray nozzle provides consistent coverage for targeted, mess-free surface treatment.
Soap scum removal
Breaks down oily residue and soap buildup on contact for easier scrubbing.
Surface versatility
Works well on most bathroom surfaces but requires careful rinsing after application.
Safety profile
Powerful chemical composition necessitates strict adherence to handling and storage warnings.
Key Specs
Form
Liquid
Capacity
16 oz
Volume
473.176 ml
Applicator Type
Spray bottle
Rinsing Required
Yes
Model Number
303-Mold-Mildew-Stain-Remover-16oz
Intended Surface or Soil
Soap Scum, Mildew, Mold, Hard Water Stains
Product Form
Liquid
Features
- Effectively removes mold and mildew
- Targets stubborn hard water stains
- Eliminates soap scum buildup
- Convenient spray bottle application
- Powerful liquid cleaning formula
- Requires rinsing after use
- Designed for tough stain removal
What customers say
Users overwhelmingly praise the 303 Mold Mildew Stain Remover for its exceptional effectiveness, especially in marine and outdoor settings. Its powerful formula quickly lifts stubborn stains from surfaces like boat vinyl and canvas, often requiring minimal scrubbing. Reviewers frequently note its superiority over traditional bleach products, achieving better results without harsh corrosive damage to materials. While the strong odor requires good ventilation, the product’s ability to restore expensive gear makes it a highly reliable investment. The consensus confirms its exceptional performance justifies the cost, solidifying its reputation as an essential cleaning agent.
Know before you buy
This formula is designed to target mold, mildew, soap scum, and hard water stains. While effective on most tile and tub surfaces, always test a small, inconspicuous area first to ensure compatibility with your specific materials.
Yes, for best results, you should let the formula sit for a few minutes to break down the stains, then scrub or wipe the area clean before rinsing thoroughly.
No, this product is not formulated to be pet or child safe. It should be stored securely out of reach of children and pets at all times.
Yes, rinsing is a required step. After applying the spray and scrubbing away the buildup, ensure you rinse the surface thoroughly with water to remove any remaining residue.
Yes, the 303 liquid formula is specifically designed to cut through soap scum, as well as stubborn mold and hard water deposits, making it an effective choice for deep cleaning damp areas.
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Ask Hayley anything about this product before you decide.