Intercept permanently reacts with and neutralizes corrosive gases. This is a chemical reaction that is not reversible. Intercept only works where it is needed. It specifically targets reactive gases only. Intercept reactivity goes up with increasing temperature and is unaffected by humidity.
Intercept provides active protection against corrosive gases.
Museums use Charcoal Paper and Micro-sieves as absorbers of these reactive gases. They are not specific about what they absorb, they will absorb gases regardless of their reactive nature so they can get filled up with gases that would have had little, if any impact on the Silver. Limited useful life, when the paper or micro-sieves fill up they stop absorbing. The problem is it is impossible to tell when this point is reached. VCIs work by coating paper or plastic with an organic oil.