Related Clues:

• Bluish gray
• Pothole filler
• Salon alternative
• Road goop
• Metamorphic rock
• Bluish-gray
• Road material
• Webzine based in Seattle
• Pit goo
• Salt, so to speak
• Roof goo
• It may go on a drive
• Waterproofing material
• Voters' list
• Petroleum residue