With ISOLINE, your tiled roof never leaks. Even the highest quality roof tiles may not be durably waterproof; tiles can move or break due to outside elements. ISOLINE system is designed to ​repel any water that might seep through roof tiles, helping to keep the building ​100% leak-free. ISOLINE acts as durable waterproofing security, in case of a waterproofing breach in the tile cover.