Oxalic Acid Powder –
Cleaner for grey-blue stains on wooden decks | 40 g

Reliable & effective

Oxalic Acid Powder is the high-quality cleaner for removing grey-blue discolorations on wooden decks. Woods with high tannin content are particularly sensitive to contact with iron, which causes unsightly grey-blue stains. Our oxalic acid cleaner allows these discolorations to be removed quickly and effectively. 40 g of powder makes 1 liter of ready-to-use cleaner.

Features & Benefits

• Targeted effect: Removes grey-blue stains on tannin-rich woods
• Simple application: 40 g of powder makes 1 liter of finished cleaner
• Efficient: Gently and reliably dissolves discolorations caused by iron contact
• High quality: Powder for creating a concentrated cleaner
• For outdoor use: Ideal for wooden decks, furniture, or fences

Areas of application

• Wooden decks: For removing iron stains and grey-blue discoloration
• Tannin-rich woods: Sensitive species such as oak or robinia
• Outdoor wood care: For a uniform, natural wood appearance

Processing

• Preparation: Dissolve 40 g of powder in 1 liter of water
• Application: Apply evenly to the affected wood surfaces
• Reaction time: Allow to work for a short time until the discolorations are visibly dissolved
• Rinsing: Rinse thoroughly with water
• Optional: Allow the wood to dry afterward and treat further if necessary

The Oxalic Acid Cleaner reliably removes grey-blue stains and restores the natural wood look of your deck – simple, effective, and professional.