Cuprinol Woodworm Killer (WB) kills all types of wood-boring beetle larvae. Its deep penetration ensures effective protection for years to come. This low odour, water-based formula has been specially developed to make it more pleasant and convenient to use. Application: Bare Wood: Flood surfaces with 2 or 3 brush coats. Pay particular attention to endgrain, corners, joints, crevices, etc. In severe cases, also inject into flight holes 7-10cm (3-4ins) apart and repeat treatment. Re-treat surfaces cut after treatment. Polished Wood: Inject into flight holes 5-7cm (2-3ins) apart. Flood into joints. Wipe off surplus. In severe cases repeat treatment. Fluid does not penetrate polished surfaces. Wax polished surfaces will normally require re-waxing after treatment. Note: The application of this product may cause darkening of some timbers. If colour is critical, try a test area first and allow to dry fully to ensure final appearance is acceptable. After drying, glues, fillers and knottin