Dynamic, fire-resistance-rated thermally insulating and sealing system having a F-Rating of 120 min for use with curtain wall structures

A sealing system, comprising:

• a curtain wall construction;
• a floor;
• a container comprising a cavity;
• first insulation disposed in the cavity;
• second insulation adjacent the first insulation;
• and at least one fastener supporting the container, the fastener connected top end of the container;
• wherein the first insulation has a first per cubic foot (pcf) density and the second insulation has a second pcf density, and wherein the at least one fastener supports the container in a zero spandrel area of the curtain wall construction in an installed state and wherein the second insulation extends outside of the curtain wall construction and into a safing slot adjacent to the zero spandrel area in the installed state, wherein the safing slot is a gap between the curtain wall construction and the floor;
• wherein the safing slot is between the container and the floor in the installed state.