CLR® Calcium, Lime, & Rust Remover

CLR Calcium, Lime & Rust Remover is a powerful formula that quickly and easily dissolves and removes tough calcium and lime deposits as well as surface rust stains from bathtubs, toilet bowls, sinks, glass, chrome, fiberglass, stainless steel, most coffee makers, humidifiers, dishwashers, washing machines and showerheads. The formula also is perfect for use on RVs and boats. CLR Calcium, Lime & Rust Remover is part of the EPA’s Safer Choice Program and contains no phosphates and is Septic Safe . 

Look for CLR in these sizes:  28 oz.  and 1 gallon (128 oz.) bottles

 

Where to Buy
How To Use
Safety
FAQ
Testimonials

Directions:

In a well-ventilated area, mix equal amounts of CLR and warm water. Test on a hidden area before applying to the entire surface, Apply directly to the stain with a brush, cloth, or sponge. After 2 minutes, rinse  promptly with cold water. Never leave CLR on an area for longer than two minutes. Never mix CLR 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.

 CLR may etch older sinks, tubs, and tiles. CLR is corrosive. Avoid contact with wood, clothing, wallpaper, and carpeting. Some laminated surfaces (counter tops) are coated with a synthetic surface which may be affected by rust removes; clean spills immediately.

Download Safety Data Sheet

Frequently Asked Questions

Can CLR be used in a steam iron, steamer or steam machine?
It is not recommended that CLR be used in steam irons. The acids in our products are not compatible with the components of steam irons, steamers or steam machines. We recommend contacting the manufacturer of your particular steam iron, steamer or steam machine for their recommendation for products safe and effective on their materials.
Can CLR be used on clothes or fabric?
No, CLR should never be used on clothing. Please find an appropriate stain remover or laundry detergent. If CLR is spilled on fabric, you must rinse immediately. It may break down the fibers in clothing and/or fabric.
Can CLR be used on galvanized metal?
We do not recommend using CLR on galvanized metals. When a metal is galvanized, a Zinc coating is put over the metal (usually to protect it from rusting). The acids in CLR will remove the Zinc could compromise the material.
Can CLR be used on marble or synthetic marble?
We do not recommend using CLR on any natural stones, especially marble (even synthetic). The acids in our product will remove the seal, penetrating the marble and can compromise the natural beauty of marble. Even synthetic marbles are coated and real marble dust is used to give the effect of real marble. If you spill CLR accidentally on these surfaces, make sure to call a marble professional for further instructions.
Can CLR be used on paver stones?
Depending on the material of the paver (concrete is safe)it can safely be used. Always spot test in an inconspicuous area first. Make sure the pavers are not colored, stamped, sealed or coated.
Can CLR be used on pool tile?
Unfortunately, we do not recommend using CLR on pool tile. It could remove the finish from the tile. In addition, if CLR comes in contact with chlorine, it could result in toxic fumes. We recommend consulting with a pool maintenance expert for their recommendation for products that are safe and effective.
Can CLR be used to clean stains from rugs?
CLR should not be used to clean rugs or carpeting. CLR can break down the fibers in rugs and carpeting and pull the color out.
Can I clean cast iron with CLR?
We do not recommend using CLR on cast iron. The acids in CLR can compromise the metal.
Can I clean my fiberglass boat, tub, or shower stall?
Yes, CLR is found to be safe on fiberglass. Always spot test first in an inconspicuous area. Begin with a mixture of CLR and water and progress to full strength if needed.
Can I clean my vinyl siding with CLR?
Yes. You can use CLR on vinyl siding as long as it is diluted and is thoroughly rinsed off of the surface in under two minutes. Studies have shown that the top coating of the siding will be affected if full strength CLR is left on the surface for five minutes or longer.
Can I clean the filter to my humidifier?
Use only on metal filters. Dilute equal parts of CLR and warm water into a plastic container. Dip the filter into the solution for about two minutes. Brush to loosen buildup and rinse with cold, clean water. Allow to dry.
Can I put CLR in a spray bottle?
We do not recommend putting CLR in a spray bottle. CLR is acidic in nature and the solution could "spray back" on your clothes or in your eyes or can get on materials it's not intended to be used on.
Can I use CLR Calcium, Lime and Rust to clean my pet bowls?
Yes, CLR is great for cleaning pet bowls from food, grime and water deposits! Dilute equal parts warm water and CLR to clean ceramic, stainless steel or plastic bowls. Leave on for 2 minutes using a sponge or scouring pad to assist in removal of stains, then rinse thoroughly with cold water. While our product is non-toxic we recommend washing the bowls prior to putting food or water back in them.
Can I use CLR in my swimming pool?
We do not recommend using CLR on or in any materials associated with a swimming pool. CLR should never come into contact with chlorine (or any other household chemical). It can create a poisonous gas and is not safe. We recommend consulting with a pool maintenance expert for recommendations for products that would be safe and effective.
Can I use CLR in/on my water heater?
Jelmar DOES NOT RECOMMEND the use of CLR in or on any water heaters (tank or tankless); however there is a website that does. Again, JELMAR DOES NOT RECOMMEND THE USE OF CLR IN A WATER HEATER. The chemical make-up of CLR is not compatible with the materials or components of a water heater and cannot be thoroughly flushed through the water heater after 2 minutes. We recommend using what the manufacturer of the water heater deems safe and effective.
Can I use CLR on concrete?
While CLR is generally safe and effective in removing calcium, lime and/or rust from concrete, ALWAYS spot test in an inconspicuous area first. Apply a small amount of CLR to the spot test area using a damp cloth or sponge, let sit for no longer then 2 minutes, then rinse promptly and thoroughly with clear cold water. Let dry completely (usually overnight). If there are no adverse reactions between CLR and the concrete (change in color or texture), it would be safe to use on the other affected areas of the concrete. Do not use CLR on colored/tinted concrete, concrete poured less than 1 year ago, concrete that is stamped, sealed or coated. Note: Concrete is naturally made of calcium and run the risk of pulling the pigment out of concrete when using a calcium remover on something naturally made of calcium (such as CLR).
Can I use CLR on my car to remove rust?
We do not recommended using 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 rims are made of chrome or stainless steel only, no alloys).
Can I use CLR on my granite countertop?
We do not recommend using CLR on any natural stones, including granite. The chemicals in the CLR can remove the seal and penetrate the stone.
Can I use CLR to clean out my radiator?
CLR should not be used in or on a car radiator. CLR may not be compatible with the materials associated with a radiator and it could have adverse effects if the CLR is not rinsed out completely.
How do I clean hard water deposits from my drinking glasses?
We recommend using a 50/50 solution (equal parts of CLR and warm water) into a glass or porcelain bowl. Apply solution to the affected stained areas of the glasses using a damp cloth or sponge. After 2 minutes, rinse thoroughly with cold, clean water. If it seems that CLR helped a bit but the glasses are not completely clear, repeat at full strength if necessary. Due to the natural density and hardness of calcium as a mineral, the calcium can actually etch and embed itself into the material of the glass (usually present by having a cloudy appearance vs. spotty).
How Do I Use CLR
In a well-ventilated area , mix equal amounts of CLR and warm water. Test on a hidden area before applying to the entire surface. Apply directly to the stain with a brush, cloth or sponge. After 2 minutes rinse promptly with cold water. Never leave CLR on an area for longer than two minutes. If the stain does not disappear, repeat this process and add more CLR solution as necessary. Never mix CLR 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.
How do I use CLR to clean a showerhead?
We recommend using a 50/50 solution (equal parts) of CLR and warm water. If possible, remove the showerhead and submerge it in the solution for no longer than 2 minutes (using an old toothbrush on the face of the showerhead after it has soaked will assist in removing the mineral buildup) then rinse promptly and thoroughly with cold water. Repeat at full strength if necessary, rinsing thoroughly after each application.
How do I use CLR to clean coffee pots, pans or tea kettles?
Pour enough CLR to cover bottom. Swish around in pot or pan. Add one cup of warm water, allow mixture to soak for two minutes and thoroughly rinse with cold, clean water. Using a soft scouring pad while our product is sitting on the stains is recommended. Always check with the manufacturer of your coffee pots, pans and tea kettles first for their recommendations of products that are safe and effective on their materials.
How do I use CLR to clean my coffee maker?
Mix one part (ex: 1 cup) CLR to eight parts (ex: 8 cups) water (for 10-12 cup automatic drip coffee makers). Run through coffee maker as if making coffee. Dispose of solution once product has run completely through the maker, then fill entire pot with clear, cold water and run a complete cycle twice. Instructions are for a regular 8-12 cup coffee maker. *Do not use CLR in coffee makers that hold water permanently. *CLR is not recommended for Gevalia, Keurig or Cuisinart coffee makers. *Do not use CLR in espresso machines. Always read your coffee maker’s manufacturer’s directions before using CLR Calcium, Lime and Rust to make sure product is compatible. Certain coffee makers contain permanent carbon/charcoal filters. Consumer discretion is always advised.
How do I use CLR to clean my dishwasher or washing machine?
Dishwasher: REMOVE dishwashing rinse agent before using CLR. Pour a 1/2 cup of CLR into directly into the bottom of an empty dishwasher (no glasses, dishes, or flatware but the racks can stay). Run a normal cycle followed by an extra rinse cycle. Make sure there are no detergents or any other chemicals in the machine while using our product. Washing Machine: Run your empty machine (no clothes) without detergent up to the main wash cycle, which is where the water stops and the cycle is about to agitate. Stop the machine and add one-half cup of CLR directly into the tub of the machine. Finish cycle. Run one additional full cycle (wash and rinse) with water only to rinse machine fully. If your machine is HE (high efficiency) and/or 'Water Saver' we recommend using a 1/4 cup of CLR, instead of the normal 1/2 cup recommended for any other type of washer/dishwasher. For Front Loading Machines: Simply add a 1/2 cup of CLR to the soap dispenser (only 1/4 of a cup for HE machines). After the full cycle has completed, run an additional rinse cycle with just water. Make sure there are no clothes or other chemicals in the machine when using our product.
How long is the shelf life of CLR?
We recommend using or disposing of CLR within 3 years. Make sure cap is securely fastened after each use.
I used CLR to clean my glasses and it did not remove the deposits. Do you know why?
If it seems that the CLR did not help at all, the glasses may be etched and there is no remedy to remove the cloudiness. The cloudiness is actually tiny cuts made in the glass by deposits in the water. The only thing that may remove the etching is a jeweler’s polishing.
Is CLR safe for ice makers?
We do not recommend using CLR to clean ice makers. The acids in our product are not compatible with the components of ice makers. We always recommend referring to the manufactures recommendation for safe and effective products to use on their materials.
Is CLR safe on grass, shrubs, plants, and flowerbeds?
CLR is safe on grass, shrubs, bushes, plants, flowerbeds and all types of flora. We strongly recommend you water the area where the CLR will run down, land, or touch before and after using CLR.
Is CLR septic safe?
Yes, CLR is septic safe. By the time it reaches the septic system it is neutralized with water.
What about the safety of my family and the environment?
CLR Power Plumber is safe to have around your family because it is non-toxic. It contains no harsh chemicals, acids or lye. It is non-polluting and will not contaminate ground water. Even the can is recyclable!
What surfaces should I not use CLR on?
DO not use CLR on any natural stone or marble (including cultured marble), terrazzo, colored grout (any other color than white), any painted, coated, sealed or metallic glazed surfaces, plastics, laminates, Formica, Corian, aluminum, galvanized metals, nickel, oil rubbed bronze, brass, copper, steam irons, leaded crystal, refinished tubs or any damaged or cracked surface. CLR may etch older sinks, tubs and tiles. CLR is corrosive. Avoid contact with wood, clothing, wallpaper and carpeting. Some laminated surfaces (counter tops) are coated with a synthetic surface which may be affected by rust removers; clean spills immediately. Always spot test first on an inconspicuous area.
What will CLR do to brass, copper or aluminum?
CLR can not only remove the finish off of brass, aluminum and copper, but can also pit certain grades of brass, copper and aluminum.
Will CLR remove oil from my concrete driveway or garage floor?
We do not recommend using our CLR to remove oil. If CLR is mixed with oil, it will darken the concrete, which is very difficult to remove. To remove oil from concrete or blacktop, we do recommend using our product CLR® Grease Magnet.

Share a testimonial

Beth from Prather California wanted to let in some of that beautiful California sun without having to look at water spots on her windows.  “I have used CLR Calcium, Lime & Rust Remover for years, but had never used it on my water stained windows.  I live in the central valley of California.  With the summer heat, sprinkler water gets on my windows and the water spots bake into the windows.  I have used various products to remove the water spots, and a lot of elbow grease, but nothing has worked as well as CLR.  Thanks for a great product.”
Beth Prather, CA
James from Bunker Hill Indiana is a bit of a skeptic.  When he bought CLR® Calcium, Lime & Rust Remover he doubted that it would work as well as advertised.  “I tried your CLR® cleaner for the first time, and fell in love!  I was very skeptical when buying this product because almost all cleaners say the same thing, but never work.  Before using your product my shower head was barely putting out any water, almost like I had no water pressure, then I used the CLR® and now it’s like I have a brand new shower head. Not only did the CLR® open up the holes, it removed all the lime scale buildup on the outside of the shower head as well.  I will definitely be using CLR® again in the future. Thank you for making a product that actually works like it says it does!”
James Bunker Hill, IN
We have never been afraid of a little competition.  Laura from Bethlehem Connecticut contacted us after her husband decided to test one of our competitive products.  “Our household has been using CLR Calcium, Lime & Rust Remover, happily for years.  My husband came home a couple weeks ago with a new product he saw advertised.  It wasn’t that he wasn't satisfied with the cleaning CLR was doing, but he wanted our cleaning woman to try this new product.  Three weeks later the once used product is in the recycling bin.  It didn’t even come close to doing the cleaning that your product does!!  We are back to using CLR and will NOT be trying any other new products.  When we first hired this cleaning service they hadn’t used CLR before, now it’s all the company uses.  Thanks for such a great product.”
Laura Bethlehem, CT