Without changing the color of the wood.
Excellent preventive, the HM1 has a curative action limited to the furniture beetle (flight holes +/- 1 mm). Colorless, the HM1 takes care of wood and is perfect for parquet (oak, chestnut), finishing and restoration of antique furniture.
FR : http://www.galtane.com/index.php/fr/product/hm1
NL : http://www.galtane.com/index.php/nl/product/hm1