Frequently asked questions | CLR Calcium lime and rust remover (2024)

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CLR General FAQs

CLR cleans what many household products cannot. It dissolves stubborn stains caused by limescale, limescale and surface rust from hard water. You may not know what they are, but chances are you live with them. Some examples where CLR can be used are;

  • Poor performing shower heads
  • Dishwashers (not drawn)
  • Washing machine
  • Shower screens (NOT SYNTHETIC COATED)
  • Electric water heaters (EXCEPT EXPOSED ELECTRICAL PARTS)
  • Toilet pots
  • Draining
  • Cloudy glass
  • Chrome
  • Optical fiber
  • Stainless steel
  • Tools

And much more.

Yes, CLR is septic safe.

We do not recommend leaving CLR on any surface for more than two minutes. Always ensure that CLR is rinsed thoroughly after use.

Calcium Limescale & Rust Remover, commonly known as CLR, is a household cleaning agent used to dissolve stains such as lime, lime and iron oxide deposits. The main ingredients are water, lactic acid and gluconic acid.

Water coming out of your faucets or shower heads can be classified as hard or soft. Hard water is water that contains a high level of minerals, especially calcium and magnesium carbonates. Hard water can be problematic because it causes limescale and limescale deposits, making surfaces around the home look unattractive.

Calcium consists of off-white or brown spots on surfaces. Calcium is found wherever there is water, especially hard water. Windows, showers, toilets, sinks, walls and doors are common places where mineral deposits can collect. Limescale stains can be effectively removed with CLR Calcium, Limescale & Rust Remover.

Lime is a hard chalky deposit composed mainly of calcium carbonate (CaCO3). Limescale stains occur more often when the water is heated and hard water evaporates. Limescale deposits tend to build up in radiators, engines, coolers, machines and pipes, especially in areas with hot water. Do you have a limescale problem? Repair them with CLR Calcium, Lime and Rust Remover.

Rust is an iron oxide, a normal reddish-brown oxide formed by the reaction between iron and oxygen in the presence of water or moisture. Rust is especially more common in coastal areas. Surface rust can be easily removed with CLR Calcium, Limescale & Rust Remover.

We recommend using or throwing away the CLR within 3 years. Make sure the cap is tightened securely after each use and the product is stored in a cool place.

CLR Action Cleaner 750ML for bathrooms and kitchens frequently asked questions

Although both products come from the fine CLR family, they are formulated differently and solve different cleaning problems. See each product label for recommended uses, along with helpful information on our website.

Suitability for use on taps and taps depends on the type of material. Check the eligibility section of the website for more information.

No. It is only safe to use on white grout. If the solution is used on colored caulk, it will lighten the color of the caulk over time or cause discoloration.

No, CLR Bathroom & Kitchen should not be used in a washing machine or dishwasher. The cleaning agents in the product may foam too much when stirred. For these applications use CLR Calcium, Limescale & Rust Remover in the gray bottle. CLR Bathroom & Kitchen does not contain the ingredient needed to remove rust, only our CLR in the gray container does.

No. The two products have different ingredients and, like any cleaning product, should never be mixed with another cleaning product.

The effectiveness of the CLR may decrease over time. The way the CLR is stored, for example in heat or direct sunlight, can speed up the process. CLR becomes less effective after 3 years from the date of manufacture.

Only if the shower cabin does not have a synthetic coating. Be sure to test a small, inconspicuous area first before cleaning the entire shower to check for any negative effects.

Yes, CLR Bathroom & Kitchen Action Cleaner is absolutely safe for acrylic. Follow the directions on the bottle and rinse after 2 minutes.

Do not use on stone, aluminum, brass, bronze, oil-rubbed bronze, nickel, brushed nickel, copper, shower doors and screens with synthetic coatings, mirrors, plastic laminates, wood, fabrics, marble. colored joints, painted surfaces or wall coverings.

Yes, CLR is great for cleaning food and water residue in the feeder! Spray CLR Bathroom & Kitchen on the affected area of ​​ceramic, stainless steel or plastic bowl. Although our product is non-toxic, we recommend that you wash the bowls first before putting food or water in them.

Our CLR bathroom and kitchen can be safely used on sealed granite to remove hard water deposits and stains. Granite is the ONLY natural stone on which our CLR Bathroom & Kitchen can be used.

CLR Calcium, lime and rust remover 750ML Frequently asked questions

CLR can not only remove finishes from brass, aluminum and copper, but can also pit certain grades.

Do not use CLR on natural stone or marble (including cultured marble), terrazzo, stone concrete, gravel, colored grout (any color other than white), painted, coated, sealed or metallic glazed surfaces, plastics (food grade or soft), laminates, Formica, Slate, Titanium, Rubber, Corian, Aluminum, Galvanized Metals, Nickel, Oil Rubbed Bronze, Brass, Copper, Steam Iron, Lead Crystal, Lacquered Vessels or any damaged or cracked surface. CLR can etch older sinks, tubs and tiles. CLR is corrosive. Avoid contact with wood, clothing, wallpaper and carpets. Some laminated surfaces (table tops) are covered with a synthetic surface that can be attacked by rust removers; clean up spilled liquids immediately. Always try to test in an inconspicuous spot first.

We do not recommend putting CLR in a spray bottle. CLR is acidic in nature and the solution can corrode the plastic container you use to store the CLR. If you want to use CLR in a spray bottle format where it is not important for you to control the dilution, try CLR Ready to Use in the 750 ml spray bottle.

If the CLR was not effective in cleaning the glass, the surface may be etched and there will be no means to remove the haze. The cloudiness is caused by small cuts in the glass due to deposits in the water. The only thing that can remove the etching is goldsmith's polish.

CLR is not recommended for use in steam irons. CLR is not compatible with the components of steam irons, steamers or steam engines. We recommend that you contact the manufacturer of your specific item for advice on suitable cleaning solutions.

We do not recommend using CLR to clean ice machines. The acids in our product are not compatible with ice machine parts. We recommend always consulting the manufacturer's recommendations for safe and effective products to use on their materials.

We do not recommend using our CLR to remove oil. When CLR is mixed with oil, it darkens the concrete, which is very difficult to remove. To remove oil from concrete or asphalt, we recommend using our product CLR Oil & Grease Remover.

Yes, CLR is septic safe. When it reaches the septic system, it is neutralized with water.

We do not recommend the use of CLR on or in materials associated with a swimming pool. CLR should never come into contact with chlorine, as dangerous toxic fumes can be produced. We recommend that you consult a pool maintenance professional for product recommendations that are safe and effective.

We do not recommend the use of CLR on swimming pool tiles. It can remove the finish from the tile. In addition, if CLR comes into contact with chlorine, it can lead to toxic fumes. We recommend that you consult a pool maintenance professional for their advice on products that are safe and effective.

We do not recommend the use of CLR on natural stone, especially marble (even synthetic). CLR removes the seal, penetrates the marble and can damage the natural beauty of the marble. Even synthetic marble is coated and real marble dust is used to achieve the effect of real marble. If you accidentally spill CLR on these surfaces, call a marble professional for further instructions.

We do not recommend the use of CLR on galvanized metals. When a metal is galvanized, a zinc layer is applied over the metal (usually to protect it from rust). CLR removes the zinc that can attack the material.

We do not recommend the use of CLR on cast iron. CLR can attack the metal.

We recommend using or throwing away the CLR within 3 years. Make sure the cap is tightened securely after each use and the product is stored in a cool place.

CLR is safe on grass, shrubs, bushes, plants, flower beds and all types of flora. We highly recommend watering the area where the CLR runs down, lands or hits before and after using the CLR.

We do not recommend the use of CLR on natural stone, including granite. CLR can remove the seal and penetrate the stone.

CLR is suitable for use on vinyl siding as long as it is diluted and thoroughly rinsed from the surface within two minutes. The top layer of the siding will be damaged if pure CLR is left on the surface for five minutes or more.

Yes, CLR has been shown to be safe on fiber optic. Always try to test in an inconspicuous spot first.

No, CLR should never be used on clothing. Find a suitable stain remover or detergent. If CLR is spilled on fabric, rinse immediately. It can break down the fibers in clothing and/or fabric.

Depending on the material of the paver (uncolored concrete is safe), CLR may be suitable. Always try to test in an inconspicuous spot first. Make sure the pavers are not stained, stamped, sealed or coated.

CLR should not be used to clean carpets or rugs. CLR can break down the fibers in carpets and rugs and strip the color out of them.

Yes, CLR is great for removing food, dirt and water deposits from pet food bowls! Although our product is non-toxic, we recommend that you wash the bowls first before putting food or water in them.

Although CLR is generally safe and effective at removing lime, scale and/or rust from concrete, always test in an inconspicuous area first.

Do not use CLR on colored/tinted concrete, concrete poured less than 1 year ago, concrete that has been stamped, sealed or coated.Note: Concrete is naturally made of calcium and there is a risk of the pigment being pulled out of the concrete if you use a lime remover on something that is naturally made of calcium (such as CLR).

CLR should only be used on porcelain/fiberglass baths. Never use on an enameled bath where the enamel is cut/cracked. May react with some type of coating applied to baths.

CLR is only safe to use on non-colored stones as it can transfer color and cause dark spots. Do not use on tinted, coated, painted, sealed brick or mortar. Care must be taken to ensure that CLR is not applied to mortar that may chip. Rinse thoroughly if exposed to CLR.

CLR is not recommended for use on color bonded powder coatings. CLR can react with the paint and compromise the integrity of the surface, leading to rust and flaking.

Do not use CLR on dishwashers with drawers. The piping system prevents CLR from flushing properly and can be corrosive if not flushed thoroughly.

CLR is only effective for cleaning white grout. Not suitable for colored joints.

CLR is safe on grass, shrubs, bushes, plants, flower beds and all types of flora. We highly recommend watering the area where the CLR runs down, lands or hits before and after using the CLR.

We do not recommend the use of CLR on galvanized metal, aluminum or copper. CLR will attack these metals.

CLR is safe to use on metals such as stainless steel and solid chrome.

We do not recommend the use of CLR on a car. The acids in our product should not be used on aluminum or any painted/coated surface. You can safely remove rust from car wheels (if the rims are only made of chrome or stainless steel, no alloys).

CLR is not effective against mold and mildew. Acidic cleaners are not effective at removing mold.

The effectiveness of the CLR may decrease over time. The way the CLR is stored, for example in heat or direct sunlight, can speed up the process. CLR becomes less effective after 3 years from the date of manufacture.

We do not recommend mixing CLR Calcium Lime & Rust with other household cleaners or bleaches.
Be sure to always read the manufacturer's instructions for the item you are cleaning to ensure this product is compatible.

Mixing chemicals can create a vapor that is dangerous to inhale.
We do not recommend mixing CLR Calcium Lime & Rust with other household cleaners or bleaches.
Be sure to always read the manufacturer's instructions for the item you are cleaning to ensure this product is compatible.

CLR grease and oil remover 750ML frequently asked questions

CLR Grease & Oil Remover should only be left on a surface for 1-5 minutes before rinsing thoroughly with cold water. If the stain persists, repeat the process instead of leaving the solution on the surface longer.

The effectiveness of the CLR may decrease over time. The way the CLR is stored, for example in heat or direct sunlight, can speed up the process. CLR becomes less effective after 3 years from the date of manufacture.

If CLR Grease & Oil Remover is left on a surface for too long, it will begin to dry and can be very difficult to remove.

Frequently asked questions | CLR Calcium lime and rust remover (6)

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CLR has been a trusted brand and household name in Australia since 1982. CLR has a wide range of products that clean what many household products cannot. CLR Calcium, Lime and Rust Remover dissolves stubborn (limescale) deposits and surface rust from various surfaces, while CLR Oil & Grease Remover cuts through oil, grease and tar stains.

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Frequently asked questions | CLR Calcium lime and rust remover (2024)

FAQs

What dissolves calcium lime and rust? ›

Calcium Lime Rust, more commonly known as CLR, is a household cleaning product used for dissolving stains, such as calcium, lime, and iron oxide deposits.

What happens if CLR is left too long? ›

If CLR Grease & Oil Remover is left on a surface for too long it begins to dry and can be very difficult to remove.

Can I let CLR sit overnight? ›

Never leave Calcium, Lime, and Rust Remover on an area for longer than two minutes or mix with other household cleaners or bleach. Always read the manufacturer's directions of the item you will be cleaning to make sure that this product is compatible. Consumer discretion is always advised.

Do you need to wear gloves when using CLR? ›

Steps to be taken in Case Material is Released or Spilled: Avoid contact with skin and eyes Small Spill: No special clean-up procedure is necessary for small (less than 1 gallon) spills. Flush spill area with water. Wear rubber gloves.

What can CLR not be used on? ›

What should you not use CLR on? CLR should not be used on wood, clothing, wallpaper, carpeting, natural stones, brass, copper, aluminum, galvanized metals, and any painted, coated, or sealed surfaces. CLR stands for calcium, lime, and rust and — as you may imagine — it is designed to clean these things specifically.

Does vinegar remove calcium lime and rust? ›

Like rust stains, you can treat calcium buildup on different surfaces with different acids (e.g., vinegar, hydrochloric acid). There are also other practical solutions for removing calcium buildup. For example, you can use a pumice stone to remove stains on porcelain.

What is the strongest calcium remover? ›

Muriatic Acid

Because of the intensity of this acid, it has the ability to remove severe lime and calcium deposits found in pools and toilets.

Will WD-40 remove calcium? ›

WD-40 applied to a surface before it gets wet might keep the scale from forming or adhering, but WD-40 will not remove scale that has already formed and adhered. There are products specifically for removing limescale, and WD-40 is not among them.

Is calcium lime rust remover safe? ›

CLR PRO Calcium, Lime and Rust Remover is NSF Registered and is approved for use in food processing, food storage, and food service facilities. Plumbing and septic safe. Phosphate-, bleach-, ammonia- and alcohol-free.

Will straight vinegar remove rust? ›

Applying vinegar to rust dissolves the oxide and leaves behind a water-soluble salt that you can remove easily. It is called neutralisation, and this reaction happens between rust and acetic acid, which is why cleaning vinegar helps remove iron oxides from household surfaces and objects.

What is the best homemade rust remover? ›

Vinegar and Baking Powder:

Baking powder can work wonders with rust. It makes an effective paste mixed with vinegar. Rub the paste onto the rust spots and leave to work for at least 30 minutes. Rinse off with warm water.

Does vinegar get rid of rust? ›

To tackle items with significant corrosion, submerge your rusty tools or knives in a bowl of white vinegar and let them sit overnight or as long as 24 hours. Once they have had a good soak, remove them from the vinegar and scrub the rust off with steel wool, a scouring pad, or a wire brush.

Does CLR remove hard water buildup? ›

Does CLR get rid of hard water stains? Yes, for stubborn hard water stains on shower walls and tiles, bathtubs, sinks or faucets that need more scrubbing power, you may have to use something stronger than vinegar, like CLR Brilliant Bath Cleaner, a top-tested product that won a 2020 Good Housekeeping Cleaning Award.

Does CLR require scrubbing? ›

Apply CLR Calcium, Lime & Rust Remover directly to the stains and scrub with the brush or pumice stone. Wait for 2 minutes then flush the toilet. Repeat this process as needed until the hard water stains begin to be removed.

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