Cuprinol 5 star complete wood treatment fp is a clear water based wood treatment for the combined eradication of the two main enemies of timber rot and insect attack drying time can vary from 2 to 5 days under average temperature and with good ventilation but longer under less favourable conditions 6 to 8 weeks before laying certain types of floor covering how to apply wherever possible dip timber in fluid for at least 3 minutes otherwise apply uniformly to wooden ends and joints with at least t