Everbuild Tecnic Puraflex 25 is a one part low modulus building sealant based on polyurethane technology. Conforms ISO11600 25LM and is CE marked to EN15651-1: 2012 Type F EXT-INT CC. Everbuild Tecnic Puraflex 25 is suitable for most construction expansion and dilation joints and adheres to most building surfaces such as concrete, ceramics, wood, metal, uPVC etc.