What is the difference between Copper II and Clear Wood Preservative?
Copper II is a bright green preservative based on copper naphthenate as the active ingredient so it is best used where the greenish tinge on the wood is not a problem or a dark paint will be used over it. It cannot be painted over with pale colours and will show through transparent stains. Copper II provides slightly better protection than clear preservative so it is often recommended for wood in contact with soil or to reduce maintenance. Clear preservative is based on Zinc naphthenate and provides invisible protection. It is ideal where the natural colour of wood is desired or where the wood will be painted with light coloured paints or transparent stains.
