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Intumescent Putty Pad

Intumescent Putty Pad



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      These mold-able putty pads are a non-curing single component fire-rated material for membrane-penetration firestop systems. HydroFlame® putty will intumesce and expand when exposed to heat, forming an insulating char. In the event of a fire, putty pads will prevent the spread of flames, smoke and gas through penetration openings. Putty pads are applied by hand and mixing is never required. HydroFlame putty pads are rated for up to 3 hours as tested in accordance to ASTM E814, UL 1479 and CAN/ULC 4-S115-M test standards. HydroFlame putty pads are designed to be used in conjunction with metallic or non-metallic electrical box outlets.


      • Possesses intumescent properties; expands when exposed to fire

      • No volatile solvents, which makes it particularly useful when installing in confined spaces or occupied areas

      • Does not have asbestos fillers

      • A single component putty system; no mixing necessary and no required additives

      • DOT classification is not regulated

      • Applied by hand

      • Easy to install

      • Adheres to all common building common surfaces

      • Clean air gold certified



      • Package Quantity: 1

      • Type: Intumescent putty pad

      • UL Level of Fire Protection (Hours): 4

      • Warranty: 2-Year Limited

      • Application: Through-Slab Pipe

      • Color/Finish Family: Red

      • Minimum Height (Inches): 7

      • Maximum Height (Inches): 7

      • UL Fire Rated? Yes

      • Minimum Pipe Diameter (Inches): 0

      • Pipe Material: Metal and Plastic

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