Iron OUT® Rust Stain Remover Powder

The MOST VERSATILE Rust Stain Remover. Best on Rust!

Effective Rust Removal


Recognized as the best on rust, this rust stain remover has been the go-to product for decades, effectively dealing with the toughest rust stains and trusted by generations.

No Scrubbing Required


Iron OUT® Powder does the hard work for you, removing rust stains quickly and easily without the need for scrubbing, saving you time and effort.
Unmatched Versatility: Use Iron OUT® Rust Stain Remover Powder for an array of applications; it’s your single solution for toilets, tubs, showers, water softeners, laundry and more. It’s safe on a variety of surfaces and septic systems, making it a must-have in every home.

Trusted Brand for Rust Stains


As the #1 Rust Stain Remover Brand, Iron OUT® is recognized as the best on rust. With a long-standing legacy of effectiveness, Iron OUT® Rust Stain Remover Powder has been a reliable choice for homeowners in geographic areas with high iron, building a reputation of trust through its lasting performance.

Septic-Safe Formula


Formulated with care, Iron OUT® Rust Stain Remover Powder is septic-safe, ensuring that it not only leaves your surfaces rust-free but also protects your home’s wastewater systems.

  • Made in USA

Learn More About Iron OUT® Rust Stain Remover Powder

Iron OUT® Rust Stain Remover Powder is the all-in-one solution for rust stain removal across an array of surfaces. Removing rust from bathtubs to tiles and from appliances to laundry, this powder has been the trusted authority in no-scrub rust removal for decades. Its septic-safe composition means you can apply it in any corner of your home with confidence, including bathrooms, laundry rooms, and kitchens.

For maintenance and ongoing protection, particularly in toilets, complement your cleaning with Iron OUT® Automatic Toilet Bowl Cleaner. This proactive approach prevents rust accumulation for up to 45 days, ensuring your bowl remains rust-free with minimal effort.

Have a hard to reach vertical area that needs rust stain remover attention? Check out Iron OUT® Rust Stain Remover Spray.

Iron OUT® stands unrivaled in rust stain removal, especially in areas with hard water and high iron content. It promises not just a rust-free environment but also restores the beauty of your home’s surfaces and appliances. Incorporate this versatile rust stain remover into your home care routine and reclaim the time once lost to laborious rust cleaning!

Use the following combination of Iron Out® products when treating rust stains in your toilet bowl: Iron OUT® Rust Remover Powder is ideal for removing rust stains below the water line in the toilet bowl. If you have rust stains above the water line or on other vertical or hard-to-reach areas,, use Iron OUT® Rust Stain Remover Spray to better cling to surfaces. In addition, Iron OUT® Automatic Toilet Bowl Cleaner can be used to prevent rust build-up in your toilet bowl for up to 45 days.


How to Use Iron OUT® Rust Stain Remover Powder

Please read the entire label’s instructions carefully before using.



  1. Wet the area to be cleaned.
  2. Apply the powder to a damp sponge or cloth.
  3. Rub lightly until stains disappear.
  4. Rinse.

NOTE: Not recommended for older, worn, or chipped porcelain cast iron fixtures.


Remove cleaners or deodorant from the bowl or tank. Flush.


  1. Add 1/2 cup to the water in the bowl.
  2. Scrub the stained area with a brush.
  3. Let stand until stains are gone. Flush.


  1. Raise the water level above the stain line if possible.
  2. Add 1/2 cup.
  3. Let stand overnight or until stains are gone.


All softeners on iron-bearing water require Iron OUT® as preventative maintenance and to eliminate iron build-up.


  1. Dissolve 1 cup in 1/2 gallon of cold water.
  2. Pour it directly into the brine well (for softeners with no brine well, pour directly into the salt tank when the salt level is low).
  3. Manually regenerate the softener. Repeat for a heavily fouled unit.


  1. Add 1/4 cup per 40 lbs. of salt.
  2. Layer for continuous treatment.


Follow the FIRST APPLICATION instructions above.

NOTE: If taste or odor is detected in tap water, manually regenerate the softener, then run cold water until the odor is gone.


NOTE: Do not use peroxide, bleach, bleach-detergents, oxi-stain removers or oxi-detergents.


  1. Add 1/2 cup to warm water as the washer is filling (for front-loading machines, add to the detergent drawer).
  2. Add clothes and let them soak for 5 minutes (if possible, with a soak cycle or by stopping the machine).
  3. Add detergent and resume the wash/rinse cycle.
  4. Dry as usual.


  • Test all colors before using. Use only on colorfast dyes.

NOTE: Wash each item separately using the white clothes instructions. Caution: Product may irreparably damage colors and embroidered logos.


  1. Dissolve 1/3 cup in 1 gallon of warm water.
  2. Soak the articles for 5 minutes or until stains are gone.
  3. Rinse thoroughly. Repeat as needed.


  1. Add 1/2 cup to an EMPTY machine.
  2. Run the machine through a normal cycle using water only. Repeat as needed.

NOTE: Do not open the machine mid-cycle.


  1. Mix 1 cup into 1 gallon of warm water.
  2. Wet the surface with clear water.
  3. Apply with a brush or sponge.
  4. Keep saturated until stains are gone. Rinse.

NOTE: Avoid contact with vegetation.

For more product information, see our Safety Data Sheets (SDS).

Frequently Asked Questions About Iron OUT® Rust Stain Remover Powder

What makes Iron OUT® Rust Stain Remover Powder the best rust stain remover on the market?


Iron OUT® is renowned for its exceptional ability to tackle and eliminate rust stains with minimal effort. Its powerful formula is engineered to remove rust from bathtubs, toilets, water softeners, sinks, and other surfaces, making it the top choice for homeowners looking to restore their items to a pristine condition.

Can I use Iron OUT® Powder to remove rust from my bathtub?


Absolutely! Iron OUT® is the perfect solution to remove rust from bathtubs. It’s designed to break down even the most stubborn rust stains, leaving your bathtub looking as good as new without the need for harsh scrubbing.

How often should I use Iron OUT® Rust Stain Remover Powder to keep my bathtub free of rust stains?


For routine maintenance, use Iron OUT® whenever you notice new rust stains forming in your bathtub. Its preventive action will help keep your surfaces rust-free and in excellent condition.

What does Iron OUT® Powder do in a water softener?


Iron OUT® Rust Stain Remover Powder cleans the mineral bed and removes heavy-duty iron buildup that reduces the softening and recharging efficiency of the water softener resin. The product is backwashed from the system after the cleaning is complete and regular drinking water is resumed. Iron OUT® keeps a water softener cleaned and maintained, working effectively and lasting longer.

When using Iron OUT® Rust Stain Remover Powder in my water softener, will the product get into my drinking water?


When used as directed and in a properly working water softener, Iron OUT® will not enter your drinking water. Iron OUT® does not harm your drinking water, the same way the salt in your system does not harm your water supply. Every softener has a mineral bed that water passes through. The mineral bed catches the hardness and iron particles found in the water. When the mineral bed gets compacted with particles, the softener goes into regeneration mode. During regeneration, the water supply goes into bypass mode. The salt brine and Iron OUT® are drawn into the mineral bed of the softener and they remove the hardness and iron particles from the mineral bed. This is flushed down the drain, then 40-60 gallons of fresh water is flushed through the water softener and sent down the drain. Finally, the water softener goes back into service for everyday usage. If you should ever smell or taste chemicals in your water, the lines should be flushed and we recommend contacting a water treatment specialist to service your softener.

If your water softener is not regenerating properly and you can smell or taste Iron OUT® in your water, Iron OUT® can be flushed from the lines by going to the faucet closest to the water softener and allowing the cold water to run. After the odor is gone, turn on other faucets in the home for a short time to make sure the product has been eliminated from all the lines.

Will Iron OUT® Powder remove manganese stains?


Iron OUT® may remove manganese stains if used in a higher concentration. Make a paste; apply for 10 minutes and rinse. May be reapplied if necessary.

Is Iron OUT® Powder safe for septic systems?


Yes, when used as directed, Iron OUT® Rust Stain Remover Powder is safe for septic systems. This means you can confidently use it to remove rust from bathtubs and other household surfaces without worrying about your septic system.

Are there any surfaces or areas where Iron OUT® Rust Stain Remover Powder should not be used?


Iron OUT® Rust Stain Remover Powder is not recommended for use on wood, painted materials, or exposed and corroding metal. Always pre-test in an inconspicuous area and follow the label’s instructions carefully to ensure compatibility.

Iron OUT® Rust Stain Remover Powder is NOT intended for use in swimming pool water, in a greensand filter, on a iron or steam iron, on hair, in a well, on flatware, on cars or to flush closed systems such as car radiators, to clean coffee makers, in a water heater.

Can Iron OUT® Powder be diluted with water and used in a spray bottle?


Iron OUT® Rust Stain Remover Powder should only be diluted with water in an open container, such as a plastic bucket, utility sink, washing machine, toilet bowl or bathtub. When Iron OUT® comes in contact with water, a chemical reaction produces an off gas, which if enclosed could cause bursting issues. If a liquid spray is desired for application, we recommend using Iron OUT® Rust Stain Remover Spray.

Why isn't Iron OUT® Rust Stain Remover Powder NSF approved?


Iron OUT® is not added to drinking water; instead, this product is a resin bed cleaner. Each softener has a discharge phase. In this phase, per cubic foot, 40-60 gallons of fresh water is flushed through the system and Iron OUT® is completely washed out during this phase. Therefore, it is not NSF approved.

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