Wilko Concrete Sealer has been specially developed to seal interior and exterior concrete, brick and stone floors prior to painting. It reduces the porosity of the bare floor, helping to improve the coverage and adhesion of subsequently applied paint. The product is ideally suited for garages, workshops and areas with concrete slabs. Not suitable for use over self levelling floor products, hardeners, dust proofers or power floated floors. The contents of this can will cover 25m2* which after 2 coats, is about the same area as a single garage. * Approximate coverage depends on the surface to be painted. **Calculation based on a garage 2.5 x 4m in size.