Defy Exterior Wood Brightener

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Defy Exterior Wood Brightener is an oxalic acid deck brightener for wood deck cleaning that removes dirt, grime, tannin, rust and fungi stains from wood surfaces. Find out how to clean your wood deck for the best results to restore the wood?s natural beauty. Defy Wood Brightener is a liquid concentrate that is mixed 5:1 with water to brighten and restore the natural beauty of exterior wood.


  • Restores the rich look of new wood
  • Won't harm most plants or shrubbery
  • Removes tannin and rust stains
  • Biodegradable
  • Neutralizes strippers
  • Helps stains penetrate

Defy Wood Brightener removes tannin and rust stains and is recommended for use on all species of wood, including redwood. Defy Wood Brightener will not harm wood fibers, grass or most plants when used properly.

Defy Wood Brightener is recommended for surface preparation prior to initial application of clear finishes and stains. It is used as a neutralizer and brightener for all wood species that have been cleaned with Defy Wood Cleaner. For best results, use Defy water repellent wood finishes.

How to clean your wood deck with oxalic acid deck brightener
Even new wood needs cleaning to remove mill scale, making the surface more porous to easily absorb deck stains. Defy Wood Brightener is the 2nd step in a 3 step system to maintain your deck and keep it looking like new. The 3 steps are:

  1. Brighten using Defy Wood Brightener
  2. Apply Defy water repellent wood stains

Product Data Sheet

Defy Wood Brightener is a liquid concentrate sold in 1 gallon containers. 1 gallon of Defy oxalic acid deck brightener makes 5 gallons of solution and will clean approximately 500-1,000 total square feet (or 100-200 square feet per gallon). Defy Wood Brightener is not formulated to remove intact paint, stain, or clear finishes and may dull painted and metal surfaces if not quickly rinsed.

Sizes: Gallons Only
Concetrate: Makes 5 Gallons
Coverage Per Gallon: 100-150 sq. feet
Temperature: 45-95 F
Application Tools: Sprayer, Mop
More Info: Product Data


Defy Stain Tips and

Official Help Site for


Thursday, 19 October 2017

Excellent wood brightener for prep and to neutralize a deck cleaner/stain stripper.

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  • We will reply to your comment shortly.
    opwdecks · 09/23/2011
    Oak is an American Hardwood so you did get the correct product. In future just use the Defy Cleaner and Brightener to prep.
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    dick ouweneel · 09/23/2011
    After a long story which I will not burden you with, I have two white-oak Adirondack chairs which have been Defy cleaned and Defy brightened. I have been steered to (and have now have in the garage) a gallon of Defy Hardwood stain rather than the Defy nano stain. Does this sound right? The chairs will be used at the end of a dock all summer (four months) next to Lake Michigan. If the Hardwood stain is "OK", but not first choice, I'll be maintaining them in a couple of years anyway.

    And when I "re-do" the chairs in a couple of years, can I just go back to the wood cleaner and brightener and re-stain with whatever is the first choice?

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    opwdecks · 09/21/2011
    It is not possible to add tint to the stain. You can try mixing with a different color of Defy though.
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    Cindy · 09/21/2011
    I just purchased the Defy epoxy stain. However sampled it on the deck and can not stand the color. I love the idea of using this product, but not the color. Can I tint this stain. I have five gallons.
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    opwdecks · 08/24/2011
    The colors between the Epoxy, Extreme and the Hardwood Stain are all the same.
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    Matt Sanders · 08/24/2011
    do you have samples of the epoxy stain?
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    opwdecks · 08/21/2011
    Defy Extreme
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    Mike Petro · 08/21/2011
    Which clear stain is better for a new pressure-treated wood deck, Defy extreme clear or UV expoxy?
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    opwdecks · 08/07/2011
    Yes to all of your questions.

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    Ben Hoppe · 08/07/2011
    I have a new cedar deck. Approximately 460 sq feet plus rails. I would like to maintain the natural color for as long as possible. I was thinking the extreme stain with cedar tint. Would this be my best option? Would 5 gallons be enough. Would I need 2 coats on the horizontal areas?
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    opwdecks · 07/12/2011
    No. Defy stains are semi-transparent.
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    Shannon G · 07/12/2011
    Do you have what is commonly referred to as SOLID COLOR LATEX STAIN for decks? I am trying to match a McCloskey stain that is on my back deck.