What is the difference between sealant application time, tack free time, and cure time?

Application time is the amount of time you have to work with or apply the sealant after it has been mixed or thawed, in the case of PMF.

Tack free time is the necessary amount of time for the sealant’s surface to lose its stickiness while in the process of curing. 

Cure time is the amount of time it takes for a sealant to reach its appropriate hardness.