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STI SS120 - The original and still the best, multi-purpose firestopping solution

STI SSS Firestop Sealant Product Data Sheet

STI SSS Firestop Sealant MSDS

STI SSS Firestop Sealant Brochure

How do you choose the right firestopping sealant? When the measuring stick is product performance, versatility, ease of application, and shear breadth of tested systems, STI SSS Firestop Sealant has been and remains the reigning champion of industrial-strength firestopping sealants!

Unmatched Performance: STI SSS Firestop Sealant reacts to heat using our patented and proprietary two-stage intumescent technology to expand rapidly to close off the path of smoke and hot gasses ahead of the advancing fire. Using active ingredients that are insoluble in water assures performance that is unaffected by humidity or moisture.

STI SSS Firestop Sealant adheres to all common construction surfaces and dries to form a tough yet flexible water-resistant seal that can be sanded and painted to match its surroundings if so desired. As little as 1/2″ is required to provide up to a 4 hour rating when tested to the rigorous requirements of UL 1479 (ASTM E 814).

Unmatched Versatility: Whether your applications are plumbing and mechanical or electrical and datacom, utilizing combustible or noncombustible penetrants… Triple S can do the job!

Tested & Proven: With over 200 powerful Classified Systems, STI SSS Firestop Sealant can handle virtually anything that job site conditions can dish out.

Features & Benefits

  • Unmatched Versatility… Over 200 tested and UL Classified systems!
  • Water-Based for easy installation, cleanup, and disposal.
  • Two Stage Intumescence features extremely fast and directionalized expansion.
  • Remains Flexible allows normal pipe movement.
  • Sandable & Paintable (when dry)
  • Water-Resistant Will not re-emulsify when dry!
  • Safe for contact with plastics.
  • Red Color for easy identification and inspection.
  • Excellent Smoke Seal
  • Metallic pipes including steel, iron, or copper pipe and tubing.
  • Nonmetallic pipes, conduits and tubing including PVC, CPVC, PVDF, PEX, PEX-AL-PEX, ABS and PB.
  • Cable, cable trays and bus duct.
  • HVAC ductwork
  • Insulated pipes.
  • Multi-service penetrations including AC line sets, electrical, telephone, or TV service entrance and interior penetrations.
  • Complete wood floor firestopping package for electrical, plumbing, HVAC, TV and telephone.

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