STI Marine was founded over 25 years ago and manufactures a full line of penetration seals and cable transits for fire-rated bulkheads and decks. STI Marine’s solutions offer the fastest and most cost- effective installation for both water-tight and non-water-tight divisions. With innovative products and a global presence. .

Our Mission

To provide innovative and cost-effective firestop solutions.

Our Core Values

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


Caulks, Sealants & Putties
Collars, Wrap Strip & Cast-In
EZ-Path Fire-Rated Pathways
Electrical & DataCom Cabling
Electrical Circuit Protection
Outlet & Panel Box Protection
Large Opening