Hercules® Firestop Caulk

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Hercules® plumbers Firestop Sealant is latex-based and intended formulti-purpose use. This intumescent sealant provides up to a three hour firerating and is designed for a wide array of firestop applications in smallcommercial or grouped residential construction or other structures withsimilar characteristics. Can be used in systems where dynamic movement isexpected: plumbing; HVAC; bath and dryer vents; metallic pipes; non-metallicpipes, conduits and tubing; insulated pipes; electrical and electronic cabling;concrete, gypsum, metal ductwork; wood floors.Expands up to 10 times to block flame propagation. Excellent smoke seal.Water-based for easy cleanup. Water-resistant once cured; will not separateor shrink when dry. Tested for excellent acoustical performance; reducesnoise transmission. Flexible, non-sagging, and low odor. Paintable. LowVOCs. No solvents. Non-halogenated. Does not contain PCBs or asbestos.

Click a file below to view/download

  • pdf SDS US https://www.oatey.com//ASSETS/DOCUMENTS/ITEMS/EN/SDS US - Hercules Fire Stop Sealant.pdf;
  • pdf Submittal https://www.oatey.com//ASSETS/DOCUMENTS/ITEMS/EN/PlumbersFirestopSealant_August2017.pdf;
Clear List
Properties Product No. Product Name QTY
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Size : 5 Gallon

25698 Hercules® Firestop Caulk Add to Project List

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Hercules 25698


  • Tested & Classified for Fire Resistance
  • Metallic pipes including steel, iron, or copper pipe and tubing.
  • Nonmetallic pipes, conduits & tubing including PVC, CPVC, ABS, and PEX.
  • Electrical & electronic cabling including service entrance, power distribution, computer, telephone, and television.
  • Metal ductwork including HVAC, bath, and dryer vents.
  • Insulated pipes including heating, cooling, and condensation applications.
  • Complete wood floor fire stopping package for electrical, plumbing, HVAC, telephone, and television.


  • Size 5 Gallon


Availability By Branch

Branch Name Available

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