Does the foam change physically over time?

No. FoamLok™ is inert — its physical and insulating properties are constant, as is its air seal. Ultraviolet rays from the sun will damage and break down the foam over time so the foam must not be exposed to the sun's rays.

Does FoamLok™ break down, sag, or shrink?

No. FoamLok™ does not shrink, settle or sag. The reaction that creates the stability of FoamLok™ is irreversible and it cannot break down into its constituent parts.