FORCE DALLE is a 4mm thick stabilised polyester reinforced, SBS elastomeric modified, anti-root bitumen waterproofing membrane. Used as top layer in single or multi layer waterproofing system with anti-root additive for use in inverted, warm and cold flat roofs, green roofs and blue roofs. Both surfaces of the membrane have a film finish and on the upper surface a red marker line along the selvedge indicates the 100mm lap width.