Question
What is a penetration seal?
Expert Answer
A penetration seal is a system used to seal the gaps where services (pipes, cables, ducts) pass through fire-rated walls or floors. These gaps breach the fire compartment. We use intumescent mastics, batts, and collars to seal these openings. In a fire, these materials expand to crush plastic pipes and fill voids, maintaining the fire rating of the wall and preventing smoke/fire spread.
