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Our Kaboom Mold & Mildew Stain Remover delivers professional-strength cleaning power that tackles the toughest bathroom stains on contact. Formulated with bleach to destroy mold and mildew stains, this trigger-spray cleaner penetrates deep into grout lines, tile surfaces, and shower walls where moisture and humidity create stubborn buildup.
Whether you're battling persistent black spots in your shower or tackling discolored grout, our mold and mildew remover works fast to restore surfaces to their original brightness. The trigger-spray design gives you precise application control, letting you target problem areas without waste. We designed this formula specifically for hard, non-porous bathroom surfaces where traditional cleaners fail to deliver results.
Formula & performance details

Formula & Active Ingredients
The bleach-based formula in Kaboom mold and mildew remover contains sodium hypochlorite as the primary active ingredient, delivering oxidizing power that breaks down organic stains at the molecular level. Unlike milder cleaning solutions, this professional-strength concentration tackles deep-set discoloration that develops over weeks or months of moisture exposure.
Our formula includes surfactants that help the solution cling to vertical surfaces, giving the bleach time to work on shower walls and tile without immediately running off. The trigger-spray mechanism creates a consistent mist pattern that covers large areas efficiently while still allowing precision application on stubborn spots.

Approved Surfaces & Compatibility
Safe for Most Bathroom Materials
Kaboom Mold & Mildew Stain Remover works on ceramic tile, porcelain, fiberglass tubs and showers, acrylic fixtures, sealed natural stone, and glass shower doors. We recommend testing on a small, inconspicuous area before full application, particularly on colored grout or decorative tile finishes.
The bleach formula may discolor or damage certain materials. Avoid use on unsealed marble, granite, or limestone, as bleach can etch and dull natural stone. Do not apply to metal fixtures, fabric shower curtains, wood surfaces, or painted walls. For everyday maintenance cleaning on more delicate surfaces, our Kaboom bathroom cleaner offers effective results without bleach.
Application Instructions & Best Practices
Before using Kaboom mold and mildew remover, ensure adequate ventilation by opening windows or running bathroom exhaust fans. Wear rubber gloves to protect skin from direct contact with the bleach solution. Remove personal items, toiletries, and fabrics from the treatment area.
Hold the trigger-spray bottle 6-8 inches from the stained surface and apply an even coating over the affected area. For light to moderate stains, allow the product to work for 30-60 seconds before rinsing thoroughly with water. For stubborn or set-in stains, extend the contact time to 2-3 minutes, checking progress periodically.



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Common Questions About Kaboom Mold & Mildew Stain Remover
For light to moderate stains, apply the product and allow 30-60 seconds of contact time before rinsing thoroughly with water. Stubborn or deeply set mold and mildew stains may require 2-3 minutes of contact time for complete removal.
Check the treated area periodically during extended applications. Once stains disappear, rinse immediately to prevent prolonged bleach exposure to surfaces. Always ensure adequate ventilation throughout the cleaning process.
Test Kaboom mold and mildew remover on a small, hidden area of colored grout before full application, as bleach can lighten or discolor pigmented grout. The product works safely on standard white or gray grout without color changes.
For decorative tile installations with dyed grout, consider using our oxygen-based bathroom cleaner instead, which provides effective cleaning without bleach. If you proceed with the mold and mildew remover on colored grout, limit contact time to 30 seconds and rinse thoroughly.
Use this product only on sealed natural stone surfaces, and test in an inconspicuous area first. Bleach can etch and dull unsealed marble, granite, travertine, and limestone, causing permanent damage to the stone's finish.
If your natural stone tile is unsealed or you're uncertain about the sealant condition, choose a pH-neutral cleaner specifically formulated for stone. The mold and mildew remover works best on ceramic, porcelain, and other non-porous manufactured tiles where bleach cannot penetrate and cause damage.
For routine maintenance in moisture-prone areas, apply Kaboom mold and mildew remover weekly to shower walls, tub surrounds, and grout lines where humidity creates ideal conditions for mold growth. Weekly treatments prevent stains from becoming deeply set, making cleaning faster and easier.
In bathrooms with excellent ventilation and lower humidity, bi-weekly applications may suffice. High-humidity environments or bathrooms without windows may benefit from twice-weekly treatments. Between deep cleanings, wipe down surfaces after showers to reduce moisture buildup.
Never mix this mold and mildew remover with other cleaning products, especially those containing ammonia, acids, or other chemicals. Combining bleach with ammonia creates toxic chloramine gas, while mixing bleach with acids produces dangerous chlorine gas.
Use Kaboom mold and mildew remover alone, and rinse surfaces completely before applying any other cleaning product. If you need to address multiple cleaning challenges in your bathroom, tackle them in separate sessions with thorough rinsing between different products.
If the product contacts your skin, immediately rinse the affected area with plenty of cool water for several minutes. Remove any contaminated clothing and continue rinsing until all product residue is gone.
Wear rubber gloves during application to prevent skin contact. If irritation persists after thorough rinsing, seek medical attention. For eye contact, flush eyes continuously with water for 15 minutes and contact a healthcare provider immediately.
Kaboom mold and mildew remover targets organic stains like mold, mildew, and soap scum, but may not effectively eliminate rust stains caused by iron in your water supply. Rust requires acid-based treatments that dissolve iron oxide, while bleach works through oxidation of organic compounds.
If rust stains persist after treating with the mold and mildew remover, switch to a product specifically formulated for iron stain removal. You can safely use both types of cleaners on bathroom surfaces, but rinse completely between applications and never mix the products.






