Ready-to-use primer, based on potassium water glass. Designed to prime silicate paints. To be applied to typical interior and exterior mineral surfaces, used also for restoration purposes, only when it is possible to contact the preparation of the mineral components. It can not be used on surfaces painted with acrylic paints, oil, silicone, etc. To be used on typical mineral construction surfaces which have not been protected with any synthetic coats before. It is especially recommended in places where it is required to keep the mineral character of the surface and also in the buildings which are looked after by antique restorers. Improves adhesion, equalizes surface absorption. Along with the silicone paint exterior RENOWATOR 950 complement the range of products for the restoration of monuments.