NB Wood Gard & NB Wood Gard Mih NB Wood Gard does exactly that - it guards wood against fire. Whereas NB Original is a multi-purpose product, NB Wood Gard is very specific in its role - it protects structural wood against fire. It is unique in many ways as it is the only high-performance structural fire retardant product for wood which is: non-toxic, eco-friendly, single application and clear coat. It can be applied by airless spray to any kind of structural wood, from OSB to hardwood.     NB Wood Mih is our most unique product. It offers the same fire protection qualities as regular NB Wood Gard and in addition stops the growth of Stachybotrys Chartarum (otherwise known as toxic Black Mould) AND also kills wood borne insects (to EN46-1).   Total protection for structural wood against FIRE and INSECTS!