Oxalic Acid by Ardec

4.2/5 · 13 reviews
900 g
In stock
Free Delivery
on orders over $90
Quebec, Ontario · More info

Oxalic Acid, also called salt of sorrel, is a very good brightener for wood grayed by rain and U.V. rays. Oxalic Acid can remove tough stains and marks on most woods.

Oxalic Acid can be also used to clean and unclog oiled wood like Teak wood. Oxalic Acid is used to clean wood before the use of natural paints.

Directions for use


In a plastic or glass recipient, add 1 liter of lukewarm water and 75 to 100 grams of Oxalic Acid. Mix well with a wooden spoon. Do not use tools or recipients in metal.


Once the product is dissolved, with a paintbrush, apply generously on soiled wood. Wait 20 minutes and gently brush using a nylon brush. Repeat as needed. Once the wood as brightened, wash with clear water to neutralize the surface.

The brightening will increase slightly when drying. Neutralize good the surface to slow down the brightening process.

Drying time

24 hours sheltered from sunlight.


CAUTION Poison and irritant. Wear protective glasses and gloves. Keep away from children.


Classification Wood Restoration
Brand Ardec
Size 900 g
Sold Since March 11, 2008

100% pure Oxalic Acid




White crystals

Tools cleaning


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Value and results!

Tom Wainright · Aug 17, 2021

Perfect for removing those grey stains in my boat. Easy to mix up exactly how much you need. Quickly shipped too!

review of service

Ron Buckingham · Dec 6, 2016

Very happy with order except extra charges from Canada post which your company is looking after and is keeping me informed of, hopefully to a sucessful conclusion.
Thank you'
Ron Buckingham

Oxalic Acid

Claus Reuter · Oct 29, 2016

Thank you so very much. Excellent service.

Good service

Richard Filipowski · Sep 15, 2016

Product is as ordered but the Attention to packaging show this is a well run operation

oxalic acid

Custom Soda Prep & Paint Driedger, Jim · Mar 19, 2016

mixing directions would be helpful

Oxalic acid

sean moore · Oct 24, 2015

my use of oxalic acid is as one ingredient in a mixture for cleaning watch parts prior to repair and restoration. the results were as expected. very good.

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