2010 OPUS Effect of Borate Wood Preservatives on Corrosion of Steel Fasteners

Opus Laboratories’ literature search shows RotStop preservative poses no more corrosion issues than other typical and common building treatment chemicals.

In summary, the available information shows that borate preservatives

• are no more corrosive than copper-based preservatives;
• may be less corrosive than copper-based preservatives, and
• they are not expected to promote corrosion in the intended operating conditions, once the treated timber had dried out.