Thread: oxalic acid

It will completely eliminate the weather gray from timber.
Use gloves etc, eye protection also very worthwhile.
As it looks just like sugar be sure to properly lable it and keep it in a very safe place

I think I have used this stuff in a leadlight course I did a few years ago, but I cant remember what it did. Oh well another senior moment I suppose!!
Jack

The easiest way to use is to head to your nearest chemical manufacturer and buy it pre-mixed.
It has been a while since i last used it but PPE requirements were saftey glasses, mask, rubber boots and leather or PVC apron.
Oxalic is also very good at removing oxide stains caused by bore water.
We just brushed it on using a kichen broom, but you may need something coarser like a BBQ brush, it crystalises as it dries and simply hose it off.

Hope this helps
Steve

If you mix it yourself make it a 10% solution.
As the others have said re safety

i think i will buy the crystals and mix my own, dont know what other goodies the cabots etc deck clean has in it but for the price I think i will stick with the crystals.

Oxalic acid & benzyl ammonium choloride or similar; its an algicide, try / check pool treatment products.

Cheers,
Theva

Don't mix it too strong or leave it on too long as it will stain your timber a lovely shade of "urine yellow" :eek:

Mick