Everbuild puraflex 25 is a one part low modulus building sealant based on polyurethane technology it is suitable for most construction expansion and dilation joints and adheres to most building surfaces such as concrete ceramics wood metal upvc etc is solvent free and odourless recomended for most construction expansion and dilation joints in brickwork stone and concrete structures vertical and horizontal pointing and perimeter joints around timber window and door frames capping to beaded glazin