the.com/sealant

The caulk that promises forever and means until next spring's inspection.

means A substance applied to a surface or joint to block out water, air, or other intruders by forming a tight, flexible seal.

from Built straight from 'seal' — the verb meaning to close something securely — plus the noun-forming suffix '-ant'. 'Seal' itself traces back through Old French to Latin 'sigillum', a little image or signet stamped into wax to close a letter shut; the sense drifted from 'mark that closes officially' to simply 'close up tight.' The '-ant' ending, borrowed from Latin's present-participle habit, turns the action into a thing that does it — so a sealant is, etymologically, 'that which does the sealing.'

vs adhesive
adhesive bonds things, sealant just blocks gaps
silicone type
stays flexible for decades, resists mold and UV
cure time
skins in minutes, fully cures in days
ancient version
Egyptians used pitch to seal boat hulls
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