Fiddes Oxalic Acid Crystals 1kg



  • Fiddes

Oxalic acid crystals for effectively removing light stains and blemishes from wood

Fiddes Oxalic Acid Crystals, when diluted can be used to eliminate light stains and flaws from wood surfaces and to blanch and help wood. This arrangement can likewise be used for reversing the greying impacts brought about by the sun’s unsafe UV beams.

Weight 1 kg


  • Perfect for restoring the wood to natural colour after greying from UV rays
    Can also be used to lighten wood where required
    Suitable for interior and exterior wood

Preparing and Applying


We always suggest that surfaces ought to be dry and clear, and that all hints of residue and soil be eliminated with a brush or vacuum cleaner before applying a wood finish.

The need of sanding and eliminating past finishes from the surface will rely upon the oil, wax or stain utilized (see product instructions for direction on this).


  1. Dissolve approximately 500 grams of Fiddes Oxalic Acid Crystals in 5 Litres of hot water
  2. A 100% saturated solution is achieved when precipitation of Oxalic Acid Crystals is evident in the container
  3. Use the solution while hot with a natural bristle brush, and rub well into the surface with a scrubbing brush if required
  4. Apply liberally, allowing the solution to remain on the surface until the desired lightness has been achieved
  5. Repeat the process if necessary
  6. If solution cools before the desired bleaching effect is achieved, reheat solution, however, do not boil
  7. Triple rinse thoroughly with clean water and allow to dry
  8. When completely dry, lightly sand the surface

Note: The surface must be clean and completely dry before refinishing. Incomplete drying and retained subsurface moisture can cause finish adhesion failure.

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