Full definition
The period required for an adhesive, sealant, or coating to develop its full mechanical and chemical resistance properties through the chemical cross-linking (curing) reaction. Cure time is typically described in multiple stages: (1) Open time/pot life — working time after mixing or application before the adhesive begins to set (minutes to hours). (2) Tack-free time — surface is no longer sticky (minutes to hours). (3) Fixture/handling time — bond is strong enough to handle the assembly without clamping (minutes to hours). (4) Full cure — 100% of rated bond strength, chemical resistance, and temperature resistance achieved (hours to days). Typical full cure times at 23°C: cyanoacrylate (instant adhesive) 24h, anaerobic 24h, two-component epoxy 24-72h, polyurethane 24-72h, silicone RTV 24-168h (deeper sections cure slower — moisture must diffuse in), and conveyor belt cold splice cement 4-12h. Temperature effect: per Arrhenius relationship, each 10°C increase approximately halves the cure time (many adhesives are heat-curable at 60-150°C for faster production). Below 10°C, most adhesives cure extremely slowly or not at all — minimum application temperature is a critical specification. Per adhesive manufacturer technical data sheets.