Defy Exterior Wood Brightener

0 Rating
free shipping with ground services
 Back to: Defy Wood Deck & Concrete Products

Important Note! Defy is introducing new Product Labels for 2019. The same great products are still inside, just new and improved labels.

-Please note that you may receive the new or older labels during this transition period!

 Defy Wood Brightener Label Change

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.


There are yet no reviews for this product.

Please log in to write a review. Log in

Ask a Question or Post a Picture...
You are a guest ( Sign Up ? )
or post as a guest
Loading comment... The comment will be refreshed after 00:00.
  • We will reply to your comment shortly
    Joyce · 04/16/2019
    Can the same sprayer be used to apply Defy Cleaner and then Brightener?
    Can the inside of the sprayer be cleaned out with just water and then used for other
    things? In other words it’s safe to put other products into the sprayer after rinsing it out ?
    • We will reply to your comment shortly
      The Sealer Store · 04/16/2019
      Yes. Clean with water when done and use as needed for other items.
  • We will reply to your comment shortly
    The Sealer Store · 06/21/2011
    Best to spray on then rinse after 10-20 minutes. No need to scrub.
  • We will reply to your comment shortly
    Cynthia Martin · 06/21/2011
    how do you apply defy deck brightener? Is there an oxalic acid brightener that you can spray on, wait, then rinse or do you have to spray, then scrub, then rinse?
  • We will reply to your comment shortly
    The Sealer Store · 05/01/2011
    Oxalic acid is a wood brightener not a wood cleaner.

    The only way to get it lighter and even is to use a stain stripper to remove the buildup layers of old stain then use the wood brightener to neutralize.
  • We will reply to your comment shortly
    Bob L · 05/01/2011
    I have protected my PT deck for several iterations (the last 6 yrs) with Defy Epoxy Stain (Natural). Each application has made the deck slightly darker. Prior to this year's planned restaining, I was wondering if in addition to cleaning with an oxalic acid wood cleaner, that a wood brightener would do any good. I am concerned about the deck looking blotchy as the wood brightener would not brighten where the epoxy stain was still effectively sealing the surface. Any thoughts?
  • We will reply to your comment shortly
    The Sealer Store · 04/19/2011
    No. The Defy Wood brightener does not "brighten" stain or water marks. It brightens or neutralizes wood.

    This product is also designed for outside wood, not interior furniture. We do not sell products for furniture.
  • We will reply to your comment shortly
    Ang · 04/19/2011
    I am attempting to refinish a solid birch wood bedroom set. This is my first attempt at doing this so please bear with my total lack of know-how. I have sanded my heart out but I cannot get an even color. I realize that birch is typical of this but I believe that it may have more to do with the previous stain penetrating deeper in some areas than others. There are also black water marks on the legs of the headboard and footboard. My question is, would Defy Exterior Wood Brightener be good for removing the last vestiges of stain and brighten it up? And if I used this product, would it then matter which new furniture stain I applied?
Parameters of Product: Prepping Products
Available Sizes
1 Gallon
Wood/Deck Brightener