Geodesmo® 50 is a one-component, polyurethane based primer suitable for all substrates. It can be used successfully on both porous or non- porous substrates. It is characterised by its very low viscosity and balanced curing speed which result in excellent wetting, impregnation and paint-over time on all substrates of high, low or no porosity (e.g. glass and metals). Additionally, it can be effectively used on both dry and wet concrete, even green concrete, not only as primer but also as a low-cost sealing solution, increasing the durability of the substrate.