A clear solution of 19.6% Disodium octaborate tetrahydrate and 1.0% didecyl dimethyl ammonium chloride in propylene
glycol and water. It is designed for use as a surface treatment in-situ building material to prevent and kill fungal attack and preserve against attack from both mould and wood boring insects. It penetrates 3-5mm into the wood and establishes a reserve from where further penetration takes place. It can also be used as an initial preventative treatment.