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BHT and Sulfanated Phenol Browning Removal from Carpet

These two products were added to carpet backing to increase the life of the carpeting. Most BHT came from rebound carpet cushion. The carpet mills stopped using BHT around the late 1980s. Yellowing from these two products appears as very bright yellow, like a legal pad or a canary.


  1. Mist on Citric Acid diluted at 8 tablespoons per gallon of water. Only mist onto top of carpet fiber. Agitate slightly with a Grandi Groom.
  2. Let dry thoroughly.
  3. Vacuum aggressively when dry.

Warning: Always test materials for colorfastness, follow label directions, and never mix products unless specified in the label directions. Each situation reacts differently and results may vary.

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  1. PA-SB16-EA
    Spray Bottle Only

    Our spray bottles are manufactured of translucent plastic, so you can see exactly how much formula you are mixing and how much you have to work with. Triggers are sold separately; most fit this bottle.

    • Available in 16-, 24-, and 32-ounce sizes
    • Use with most trigger heads
    • Translucent plastic to monitor chemical levels
    • 24- and 32-oz bottles feature a graduated scale

    Starting at $0.53

  2. Trigger Sprayer Heavy‑Duty
    Trigger Sprayer Heavy‑Duty

    This high volume, 1.0 cc per stroke, heavy-duty trigger sprayer fits most standard spray bottles with a 28/400 neck. It comes with a 9-1/4-inch dip tube fitted with a filter screen to keep impurities from entering the trigger chamber.

    • 1.0 cc per stroke high-volume output
    • Fits most trigger spray bottles
    • Adjustable spray pattern
    • Leakproof venting
    • Filters out impurities from trigger
  3. Sanitaire SURFACE™ QuietClean® SC9180B HEPA Upright Vacuum
    Sanitaire SURFACE™ QuietClean® SC9180B HEPA Upright Vacuum

    Durable, versatile, easy-to-use and easy to maintain, this two-motor system with its convenient attachments make cleaning carpet and bare floors effortless.

    • 13-inch cleaning path
    • CRI seal of approval; LEED compliant
    • 11.3-amp motor; 67 dBA
    • 4-quart dust bag
    • Telescopic wand with dusting brush; 50-foot power cord
    $549.99 Add to cart to see price
  4. Citric Acid Powder
    Citric Acid Powder
    Citric Acid Powder can be used to reverse browning on carpets and upholstery. It can also be used to adjust the pH of carpet before dyeing.
    • Great product for removing BHT yellowing
    • Dries to a fine white powder for easy vacuuming
    • pH: Varies
    • Safe for stain-resistant carpet
    • Dilute 8-10 tablespoons per gallon water
  5. Grandi Groom Carpet Rake
    Grandi Groom Carpet Rake

    Use the Grandi Groom to agitate pre-sprays with ease, allowing the chemical to reach soils and dissolve them prior to extraction. It's also great for grooming carpet after cleaning to promote a better appearance and faster drying.

    • Ideal for agitating pre-sprays into carpet
    • Excellent for working protector into carpet fibers
    • 18-inch-wide head
    • Complete with 54-inch handle and head
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