Related Clues:
- Car wash challenge
- Alternative to gravel, perhaps
- Therapeutic shampoo additive
- Roofer's remedy
- Salt of the sea?
- Current observer
- Surface for roads and roofs
- La Brea pit substance
- La Brea muck
- Road stuff
- Road coating
- Salt lake finally drained - desert arises
- Road paving material
- A sailor; a preservative
- Would he have skill raising end of mast?