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42 fl oz CLR Clog Preventer bottle with blue/yellow label and drain image.
Gray CLR Clog Preventer bottle with blue-yellow label showing uses for toilets, sinks, drains, and pipes.
CLR Clog Preventer bottle with sink, tub, and drain images, for monthly household build-up treatment.
Girl and dog on living room carpet; text promotes safer cleaning with EPA Safer Choice label.
Collage of dirty dishes, shampoo use, toothbrush by drain, and pipe with text about buildup sources.
Drain pipe illustration showing product clearing blockages and breaking down oils, grease, and proteins.
CLR Clog Preventer bottle with drain and disposal instructions, yellow-blue background, sink images.
CLR cleaning products with "Trusted for 50 Years" and "Household Staple Since the 1980s" text.
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Clog Preventer

Dissolves sources of clogs such as oil, soap scum, shampoo & conditioner.

Gray CLR Clog Preventer bottle with blue-yellow label showing uses for toilets, sinks, drains, and pipes.CLR Clog Preventer bottle with sink, tub, and drain images, for monthly household build-up treatment.Girl and dog on living room carpet; text promotes safer cleaning with EPA Safer Choice label.Collage of dirty dishes, shampoo use, toothbrush by drain, and pipe with text about buildup sources.Drain pipe illustration showing product clearing blockages and breaking down oils, grease, and proteins.CLR Clog Preventer bottle with drain and disposal instructions, yellow-blue background, sink images.CLR cleaning products with "Trusted for 50 Years" and "Household Staple Since the 1980s" text.

Overview

Ingredients

Instructions

  • Prevents clogs by degrading oils, grease, proteins, and fatty acids contained in many personal care products.
  • Septic safe and fragrance free.
  • Part of the EPA’s Safer Choice Program recognizing the product as a safer alternative to traditional chemicals, and contains no phosphates and is Septic Safe.
  • Pour in any drain or toilet.

What’s great about it

  • EPA Safer Choice Certified
  • 80% Plant Based Ingredients
  • 100 uses... and counting! Explore How-Tos

Available Sizes

  • 42 oz bottle
  • 80 oz bottle
UPC: 0-78291-50257-2, 0-78291-05272-5

Name

CAS

USE

Water
#7732-18-5
Dilutent

Diluent: CAS #7732-18-5. Reverse Osmosis (RO) is a water treatment process that removes contaminants from water by passing the water through a membrane, (filter), where contaminants are filtered out yielding more pure quality water.

Sodium Nitrate
#7631-99-4
Corrosion Inhibitor

Corrosion Inhibitor: CAS #7631-99-4. It can be used as an additive in industrial greases, as an aqueous solution in closed loop cooling systems, and in a molten state as a heat transfer medium. It is also a common food preservative.

Sodium Thiosulfate
#10102-17-7
Antioxidant

Antioxidant: CAS #10102-17-7.   Sodium Thiosulfate directly interacts with and neutralizes free radicals and other reactive oxygen species to prevent or slow the degradation of the product.  As part of the EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.

Monoammonium Phosphate
#7722-76-1
Preservative

Preservative: CAS 7722-76-1.

FD&C Blue No. 1
#3844-45-9
Colorant

Colorant: CAS #3844-45-9. A blue dye used for foods and other substances. As part of the EPA Safer Choice Program, it has been evaluated and determined to be safer than traditional chemical ingredients.

Pseudomonas Putida
#68332-91-2
Cleaning Agent

Cleaning agent: CAS 68332-91-2.   Bacterium used to degrade materials such as fats, oils and protein soils.

This product was determined not to be Subject to Disclosure under the California Cleaning Products Right to Know Act.

Download Safety Data Sheet

Download Safety Data Sheet in Spanish

For best results apply during time of minimal water usage or overnight.

 

Slow Drains:
Apply 2 ounces per day directly into drain for 5 consecutive days or until drain flows freely.

Drain Preventative Maintenance:
Apply 2 ounces per month directly into each drain.

Garbage Disposals:
Pour 2 ounces per month into running disposal. Quickly turn off disposal and let sit overnight.

Explore our How-to Video Library
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Frequently asked questions

While the product begins working instantly it’s best if used during low water usage, usually at night.

For a shower/tub drain pour recommended dosage per directions on the label into shower/tub drain at night. Following morning run cold water down drain.

Show More FAQs

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