One part, very fast curing, polyurethane elastic adhesive/sealant designed for car body sealing which cures on exposure to atmospheric moisture. Suitable for sealing, seam sealing, simple bonding as well as for vibration reduction and sound deadening measures in crash body repair and car body construction. Specifically developed to meet the car industry requirements, it is characterised by an initial controlled viscosity that makes the product easy to brush and to smooth, particularly in those applications where a thin layer or bead of adhesive is required. Once cured, the products reach high levels of hardness shore that gives a first equipment appearance to the material.