DuroFlex PU 671 is a 1-component primer, impregnation sealant and top coat. Layers made of DuroFlex are elastic and resistant with excellent adhesion. This feature makes DuroFlex the perfect bonding bridge for subsequent coatings, especially if the surface is difficult, such as bituminous surfaces. Impregnation seals are silk-mat till shiny and have a clear appearance. These films are a perfect surface protection and abrasion resistant.