Concrete sealers protect your concrete from weather damage, oil spills, along with other harmful substances. Concrete sealers have the ability to bring out the natural beauty of one's concrete and allow it to be easier to clean. Having said that, for your sealer to work, it should be applied correctly. https://color-pave.co.uk/a-step-by-step-guide-to-sealing-your-concrete-driveway/