For exterior use on flat roof areas, gutters, lead flashing, slates, asbestos, cement, metal, asphalt, old roofing felt, bay window and porch areas All-weather product - can be applied even in damp conditions Excellent flexibility and durability - Exceptional adhesion to virtually any roofing material Does not require special primers, and can provide long term protection in excess of 10yrs Specifically developed to provide instant waterproofing for leaking roofs, Manufacturer: Flag Paints