Firestop Solutions For

Expertise You Can Rely On

STI’s Marine team of experienced professionals is ready to assist on your next project. We employ field representative all over the globe to provide expert one-on-one support and training in your office or in the shipyard. We have engineering offices in different countries to provide technical support for even the most complicated applications or custom situations.


For over 30 years, STI has been the leader in developing innovative firestopping solutions - whether on land or at sea. Trust STI for Service, Technology, and Innovation; pillars for our success and yours!

Our Mission

To provide innovative and cost-effective firestop solutions.


  • Firestopping and its important role in life safety
  • Our customers’ success and making their experience with us as valuable and enjoyable as possible
  • Delivering knowledge and outstanding technical support
  • Maintaining a culture of integrity, caring, respect, flexibility, teamwork, and fun
  • Developing high-quality, innovative, and environmentally responsible products
  • Our employees and their personal and professional development
  • Financially sustainable performance

Marine MPACT Test

Footage from an MPACT test taken at our onsite testing laboratory demonstrating the resilience of MPACT

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Marine Firestop Applications

Ez-path Marine Cable Transits

The Total Solution for Maintaining the Integrity of Fire-Rated Bulkheads and Decks

  • The Fastest and Easiest Way to Run Cables
  • Adapts to Future Cabling Expansions
  • Provides Maintenance-Free Cable Seals 24/7

Impact Your Bottom Line

M-PACT® represents the fastest solution for sealing fire-rated cable and pipe penetrations in both watertight and non-watertight divisions. It combines pliable, non-combustible filler blanket with advanced watertight MFS sealant. 

Marine Products

We offer a comprehensive line of penetration seal solutions for addressing in rated divisions. 

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M-PACT Installation Instructions

Wrap plastic pipes (if present)with a single layer of MWS MarineWrap Strip on both sides of sleeve,recessed 12.7 mm from sleeveends.

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EZ Path Welding Instructions

Refer to product installation instructions: ZIS1079 (MDM150A & MDM150B), ZIS1211 (MDM150Y), ZIS1212 (MDM150Z), ZIS1080

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MFS - Marine Firestop Sealant

A single component, flexible, hybrid-polymer firestopsealant for use as a penetration seal in fire-rated bulk-heads and decks.

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MDM150 Fire-Rated Cable Transit

Cable transit device consisting of heavy gauge steel shellwith self-adjusting intumescent liners to allow cables