PHOENIX RESEARCH ASIA CO., LTD.
Eco-Boron Pro Wood preservative is made from "sodium borate", a non-volatile inorganic compound. Can absorb into the wood quickly, Protects against deterioration by insects and fungi when evaporation is not formed. Therefore able to act for a long time continuously.
It is also supported by the Japan Forest Conservation Society. Regarding being a chemical that does not cause health effects according to the Building Pollution Disease Regulations. Certificate number A-5430, so you don't have to worry about disease caused by indoor pollution.