Answer:

sealant

Answer	Crossword Clue
SEALANT	Closer-up
SEALANT	Caulking
SEALANT	Caulk, say

SEALANT	Adhesive, often
SEALANT	Deck preserver
SEALANT	Weatherproofing application
SEALANT	Watertight coat
SEALANT	Leak stopper
SEALANT	Waterproofing
SEALANT	Adhesive.
SEALANT	Leakage preventer

SEALANT	Substance for a leaky radiator
SEALANT	Leaky radiator remedy, e.g.
SEALANT	Adhesive substance
SEALANT	Putty, e.g.
SEALANT	Waxy substance
SEALANT	Certain wax
SEALANT	It may be under a coat
SEALANT	Pipe application

SEALANT	Deck covering to keep out moisture
SEALANT	Weatherproofing stuff
SEALANT	Putty, to a glazier
SEALANT	Stopgap measure?
SEALANT	It's got things covered
SEALANT	Janitor's supply
SEALANT	Weatherproofer, e.g.
SEALANT	Caulk, for example

SEALANT	Repair material