When battling Vanadium and Manganese stains the best policy to ensure stain free bricks is prevention, keeping your bricks out of the rain, dry and covered up during the laying process can ultimately ensure minimal problems with staining. However things don’t always go as planned and there is no predicting the weather, so the next plan of attack is how do I remove this without ruining my block work?
The next section outlines the difference between manganese and vanadium salts. However people must remember that although staining of this can happen; it is quite rare and more common to a couple of types of bricks. Also because this phenomenon is a natural occurrence across the brick manufacturing industry it can effects all brands of bricks.
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Manganese