A mono-component hybrid sealant suitable for sealing joints in porous substrates. It is tailor-made to provide a weather sealing solution when over-paintability, low dirt pick-up and low staining is required. It is easy to use: has excellent extrudability and toolability and can be used for quick and aesthetic joint seal applications. This product is a one part, neutral curing sealant particularly suitable for exterior applications such as pre-cast panel joints, expansion joints and weather seals for concrete, masonry, bricks, stone or wood façades. It conforms to EN 15651-1, 2&3.