Maya Ellison
Bleach is a common household cleaner, but it is not always the best option for every situation. One question that often comes up is whether bleach can kill mould on plastic and other surfaces. Bleach can kill mould, but it is most effective on hard, non-porous surfaces like glass, sinks, tiles, and tubs. On porous surfaces, such as drywall and wood, bleach is less effective because it cannot penetrate deep into the material to reach the roots of the mould, and may even encourage further mould growth. There are also health concerns associated with using bleach to clean mould due to the toxic fumes produced, especially if mixed with other cleaning products.
| Characteristics | Values |
|---|---|
| Effectiveness on non-porous surfaces | Bleach is effective at removing mold from non-porous surfaces such as tiles, sinks, glass, and plastic. |
| Effectiveness on porous surfaces | Bleach is ineffective at removing mold from porous surfaces such as wood, drywall, and hardwood floors. It only removes surface mold, and the mold will continue to grow beneath the surface. |
| Health concerns | Bleach can be harmful to humans, especially with prolonged exposure or inhalation. It can irritate the skin, eyes, and nostrils and affect the lungs. Mixing bleach with ammonia or other chemicals can produce toxic fumes. |
| Alternative solutions | Hydrogen peroxide, vinegar, baking soda, and tea tree oil are non-toxic alternatives that can be used to remove mold from both porous and non-porous surfaces. |
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What You'll Learn
Bleach is ineffective on porous surfaces
Bleach is a corrosive substance that can be harmful to surfaces and human health. It is made up of about 90% water and 5-9% sodium hypochlorite. When used on porous surfaces, the chlorine content of the bleach dries up almost immediately, leaving behind water that is absorbed into the material. The water travels down to the roots of the mold, helping it to thrive.
Mold spreads its roots deep into porous surfaces. Even after applying bleach and wiping away surface mold, the mold will continue to grow beneath the surface and will return to the cleaned area in a short amount of time. Bleach cannot penetrate porous surfaces and eliminate the roots, so it won't kill mold permanently.
While bleach may be effective on nonporous surfaces like tiles, sinks, and glass, it is not recommended for use on porous surfaces like wood, drywall, and carpeting. The CDC advises against using bleach to kill mold without protective gear, and prolonged exposure to bleach can be harmful to humans.
There are many non-toxic alternatives to bleach for cleaning mold on porous surfaces, such as hydrogen peroxide, vinegar, baking soda, and tea tree oil.
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Bleach is corrosive and can damage certain materials
Bleach is a corrosive substance, especially to metal surfaces. It can also damage other materials such as fibres, cloth, and leather, as well as intentionally applied dyes like the indigo of denim. Bleach should not be ingested or inhaled, and it can irritate the skin and eyes, causing irritation, drying, and potentially burns.
When using bleach, it is important to take the necessary precautions to avoid any potential harm. This includes wearing protective clothing, such as gloves, masks, eye goggles, or old clothes. It is also crucial to ensure that the area is well-ventilated, as the vapours from bleach can irritate the eyes and respiratory system.
Additionally, bleach should not be mixed with other household cleaners, especially those containing ammonia or other acids. Mixing bleach with ammonia can produce nitrogen trichloride, a potentially explosive substance. Similarly, mixing bleach with vinegar or other acids can create highly toxic chlorine gas, which can cause severe internal and external burns.
The toxicity of bleach depends on where it is applied and the compounds present, as well as their concentration. It is important to follow the manufacturer's instructions for dilution and usage to ensure safe and effective use.
While bleach can be effective in removing mold from non-porous surfaces, it is not suitable for porous surfaces such as wood, drywall, or hardwood floors. This is because mold spreads its roots deep into porous surfaces, and bleach cannot penetrate these surfaces effectively to kill the mold entirely.
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Bleach is harmful to human health
Bleach can be used to remove traces of mold on hard and impermeable surfaces such as tubs and tiles. However, it is ineffective on porous surfaces like drywall and wood, as it cannot penetrate deep into the material to kill the roots of the mold. While bleach is effective at killing mold on nonporous surfaces, it is important to consider the health risks associated with its use.
The active ingredient in bleach is typically sodium hypochlorite, which is effective at killing germs, including viruses, bacteria, and molds, when properly diluted. However, the concentration of sodium hypochlorite in household bleach can vary, typically ranging from 5% to 9%. It is important to follow the manufacturer's instructions for dilution and application to ensure safe and effective use.
The toxicity of bleach can lead to serious health issues. Bleach toxicity can occur through oxidation or reduction reactions. Chlorine-based bleaches, for example, break the chemical bonds of chromophores, rendering them non-reactive with light. This same reaction can occur in the human body, leading to adverse health effects.
Additionally, bleach can be harmful to individuals with compromised immune systems or respiratory issues. The strong fumes and chemical composition of bleach can irritate the respiratory system, eyes, and skin. It is crucial to use bleach with caution and in well-ventilated areas to minimize potential health risks.
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Non-toxic alternatives to bleach
Bleach is a common household chemical used to kill mold. However, it is not suitable for porous surfaces, such as wood, drywall, and hardwood floors, as it cannot penetrate deep into the material. Additionally, bleach can damage your skin and produce toxic fumes when mixed with other cleaning solutions or detergents containing ammonia.
Hydrogen Peroxide
Combine one part hydrogen peroxide with one part water in a spray bottle. Apply the mixture to the moldy surface and let it sit before removing the mold. Hydrogen peroxide can penetrate porous surfaces effectively and is a non-toxic alternative to bleach.
Vinegar
Undiluted white vinegar, containing 5-6% acidity, can be used as a natural and non-toxic alternative to bleach. Place the vinegar in a spray bottle and apply it to the moldy surface. Let it sit for at least 30 minutes to 1 hour, and then wipe the surface and allow it to air dry. Vinegar can kill up to 82% of mold species and is effective on both porous and non-porous surfaces.
Baking Soda
Mix two tablespoons of baking soda (sodium bicarbonate) with two cups of water in a spray bottle and shake until the baking soda is completely dissolved. Spray the solution onto the moldy surface and let it sit before scrubbing. Rinse the area and apply the solution once more, allowing it to fully air dry. Baking soda is a natural household cleaner that can be used to effectively remove mold.
Tea Tree Oil
Mix two teaspoons of tea tree oil with two cups of water or distilled white vinegar. Tea tree oil has natural antifungal properties and can be used as a non-toxic alternative to bleach for cleaning mold.
Force of Nature
Force of Nature is an appliance that creates hypochlorous acid, a powerful germ and fungus killer that is free from the hazards of bleach. Hypochlorous acid is produced by our white blood cells to fight infections and is gentle yet effective in killing mold and mildew. It can be used on various surfaces, including tile, porcelain, stainless steel, and plastic.
Alcohol
Alcohol is effective in removing minor mold stains on fabrics, leather, furniture, and books.
Soap and Water
For hard, porous surfaces, soap and water can be used to scrub off visible traces of mold before using a disinfectant to kill residual mold and spores.
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Preventing mould growth
Bleach can be used to remove mould from non-porous surfaces such as tiles and tubs. However, bleach is ineffective on porous surfaces like wood, drywall, and hardwood floors, as it cannot penetrate deep into the material. Therefore, while bleach may kill the mould it comes into direct contact with, it cannot reach the roots of mould on porous surfaces, and the mould will continue to grow and return.
To prevent mould growth, it is crucial to address the underlying cause—moisture. Here are some ways to prevent mould growth:
- Keep your home clean and dry.
- Fix any water-related issues, such as leaking faucets, roofs, or wet basements.
- Use ventilation fans in the kitchen and bathroom, and other rooms where water is used.
- Maintain indoor humidity below 60%, ideally between 30% and 50%, by using air conditioners or dehumidifiers.
- Avoid installing carpets in areas that may become wet, such as the kitchen or bathroom. Dry area rugs and mats promptly if they get wet.
- Address plumbing leaks and moisture problems immediately, and report them to the building owner or manager if you are a renter.
- Ensure proper insulation of pipes to prevent condensation.
- Clean out gutters regularly to prevent water from pooling near your home.
- Dry water-damaged areas and items within 24-48 hours to prevent mould growth.
- Avoid long hot showers, drying clothes indoors, and using humidifiers, as these increase moisture levels in the home.
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Frequently asked questions
Bleach can kill mold on non-porous surfaces such as plastic. However, it is not recommended as a routine practice during mold cleanup due to the health risks associated with it.
Bleach is a biocide that can destroy living organisms. It kills mold by changing its colour and disinfecting the surface.
There are several non-toxic alternatives to bleach for killing mold, including hydrogen peroxide, vinegar, baking soda, and tea tree oil.
Using bleach to kill mold can be harmful to human health, especially if inhaled or if in contact with skin. It can also damage the surface being cleaned, especially if it is made of wood or other porous materials.
Bleach is a fast and effective way to kill mold on non-porous surfaces. It is also easily accessible and affordable.
