Firestop FSP Putty

Nelson Firestop Putty (FSP™) is a premixed, ready-to-use firestop product that can be hand pressed into place to form an immediate fire seal. When exposed to fire, the putty material forms a hard char that creates an effective barrier to smoke and flame.
Applications Features Product Downloads Related Products
  • Easily installed putty that inhibits the passage of smoke and flame through penetrations and joints
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