Firestop pillow

The various kinds of firestop pillows are intended to slow the spread of fire.

They are often used to meet fire-resistance ratings in conduits that need frequent access.

The products are required to have fire-resistance ratings and to be used in accordance with a certification listing.

Batt-based pillows are held in place by compressing them, allowing friction to restrain them.

The foam-based pillows intumesce, swelling as a result of heat exposure.

Three firestop pillows
Firestop pillow sample installation, alongside other firestops, being installed for passive fire protection of buildings.
Firestop pillow: Loose Fill/Fibreglass Bag type of firestop pillow. Usually this type of pillow contains a mixture of graphite and vermiculite .