Related Clues:

• Protective covering for marine mammal worker
• Boy camps in agreed pitch
• Marine creature with a group of conservationists? It fills gap
• Perhaps the Med left worker a protective coat
• Article stuffed into broken slate that may fill a gap?
• It may fill most of road in constituency
• Weatherproofing application
• It's got things covered
• Caulk, for one
• Water leak's beginning — worker gets this?
• Deck application
• Builders' material is transported round a US city
• Finish protector
• Proofing agent works, though not initially, under water
• Material blocking leaks