STI leads the industry in developing innovative fire protection systems that help stop the spread of fire, smoke and hot gases. For over 25 years, our team has worked hand in hand with the construction industry to create simple solutions to complex firestopping problems. Our SpecSeal® and EZ-Path® product lines are engineered to deliver powerful performance. Because our system designs are user-driven, they are easier to apply. The result is simply designed, outstanding fire protection systems which often result in lower installed costs. STI products and systems offer innovative firestop solutions for all types of new construction and retrofit applications. Since firestopping is our only business, we concentrate all our resources on providing the highest quality, fully tested, innovative firestopping solutions.

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


Joint Sprays
Joint Sealants
SpeedFlex Joint Protection


Perimeter Fire Barrier Spray
All Weather Firestop Spray
Anchor Protection


EZ-Path Smoke and Acoustical Pathways
Sealants & Sprays


SmokeBlock Caulk
SmokeBlock Foam