Mike , some oil stains are so heavy the only way to handle them is to cut out and patch or treat with an ifrared box. Typically if you can take a screw driver and penetrate the surface easily your sealer will not bond. If the pavement is sound try cleaning with soap and water to remove as much oil as possible just remember to flush the surface really well with clean water. All soap must be removed or you will be creating another oil spot. You may also want to try flash burning (very, very llightly) the surface with a propane burner, then apply an oil spot primer that is recommended by your sealer supplier. If these things don’t work you will have to patch the area.
Give me a call if you get a chance and let me know if these solutions were helpful. You can reach me at 404 696 7660.
