Barrettine Premier Wood Preserver is a high-quality, low odour, oil based wood preserver that is deep penetrating. Barrettine wood preserver is used for wood protection against wood-destroying fungi (wet rot), wood discolouring fungi and wood-boring insects. This wood preserver provides a semi-transparent matt/satin finish allowing the natural wood texture to be visible, it can be used on pressure-treated wood, treated timber or untreated wood. This high-quality wood treatment is suitable for rough, sawn or smooth timber, does not require over sealing for wood protection. No subsequent topcoat is required unless for aesthetic purposes. Barrettine Wood Preserver is for outdoor use and also for use on windows/frames, external doors/frames (internal & external sections). The Barrettine Wood Preserver Clear can also be used on structural timbers in unoccupied areas such as floor joists. Contains Permethrin, Tebuconazole & IPBC. Protects uncontaminated timber against wet rot, decay and wood boring insect attack. Mainly for external applications but some Internal. (refer to internal and external information on the back of the tin/container).