First you clean the teeth, then you isolate,prime and etch

Liquid rubber has a number of uses. For example, it can be used as a roof sealant or to make molds. It's sealant properties are useful in making medical devices such as dental molds.

A thin plastic substance that is painted over teeth as an anti-cavity measure to seal out food particles and acids produced by bacteria.

It is a thin substance placed on a prepared tooth before adding a composite filling or a sealant. It's purpose is to make the finishing product stick. :)

No sealant is used in that application.