the.com/sealer
the unsung bouncer that decides what gets in and what stays forever out
means A substance or device that closes a surface or gap to keep moisture, air, or other intruders from getting through.
from From "seal" plus the agent suffix "-er," meaning simply "one that seals." The root "seal" came into English from Old French "sel," itself from Latin "sigillum," a little image or mark — the wax impression pressed onto a document to prove no one had tampered with it. So a sealer keeps that ancient promise of unbroken closure, whether it's wax on a letter or a coat of finish on a wooden floor.
- wax origins
- Ancient Egyptians sealed jars with beeswax and resin
- asphalt cousin
- Driveway sealer is basically coal tar painted thin
- navy SEALs
- Different beast, but both keep water on the outside
- vacuum trick
- Removing air starves the microbes that spoil food
- self-healing
- Some modern sealers reflow to close their own cracks
silicone caulk — dap silicone caulk, bestselling waterproof sealant for bathrooms and kitchens, over 50 million units sold annually
polysulfide sealant — thiokol lp-2, developed in 1958, used to seal the alaskan pipeline and aircraft fuel tanks
tung oil finish — chinese tung tree oil, traditional wood sealer used for centuries on hardwood floors and furniture