INSTANTLY KILLS: Moss ! Lichen! Algae! Mould! The new Thermilate PRO Anti-Fungicidal Wash contains naturally occurring fungicides found in edible vegetation together with most effective organic preservatives to provide the most sustainable solution to an age old problem. This easy, one-step system is applied* after the roof has been thoroughly jet-washed down. Simply leave to penetrate the roof tiles to kill off all roots while drying, before applying 2 coats of Thermilate PRO Insulating Roof Coating. PRO Anti-Fungicidal Wash is totally compatible with the long-release inhibitors specially formulated in PRO Roof to ensure: *Apply with hand spray or pressure pump type applicators. Do not use jet-spray.