Perma-Chink OxCon Oxalic Acid

Perma-Chink OxCon (oxalic acid concentrate) is an effective treatment for rust stains from around nails, spikes, and screws. Oxcon comes as a concentrate that is diluted with water prior to use. It is best applied using a garden type pump-up sprayer but a brush or broom will also work. Apply a liberal amount to the wood, let it work on the surface for 10 to 15 minutes and rinse it thoroughly with clean water. Oxcon should not be used for spot cleaning since it may cause blotching of the surface. Perma-Chink OxCon Recommended Applications • To remove discolorations due to the presence of metallic tannates and rust. • To brighten the wood after the use of high pH strippers and cleaners. • To even out the color of a wall that's blotchy. Do not use OxCon to: • Remove grayed wood. • “Neutralize” the wood after the use of other chemicals. • To remove brown stain, blue stain or flavonoid discolorations. Perma-Chink OxCon Application Methods & Special