Driveway coating is a process of protecting and preserving the surface of a driveway. It can be done with a SEALER or TAR. SEALER is a 6 letter word and TAR is a 3 letter word. SEALER is a liquid that is applied to the surface of the driveway to protect it from water, oil, and other elements. TAR is a sticky substance that is applied to the surface of the driveway to create a waterproof barrier. Both SEALER and TAR are effective in protecting and preserving the surface of a driveway.