Industrial Insulation Group (IIG) was formed in 2002 when The Calsilite Group and Johns Manville Corp. merged the manufacturing capabilities for several high profile and widely used product lines serving North American and global industrial insulation markets. Thermo-12® Gold Calcium Silicate, Sproule WR-1200® Perlite and Super Firetemp® Fireproofing were the most recognizable brands for use in elevated temperature processes and fireproofing in the refining, petrochemical, power generation, pulp and paper, metals manufacturing and other sectors.

The IIG product offering was expanded further in 2003 with the acquisition of mineral wool manufacturing and the MinWool-1200® brands of pipe, board and blanket insulations. This addition also brought the company further into mineral wool applications for sound and fire protection featuring MinWool Sound Attenuation Fire Batts (SAFB), Safing, and Curtainwall insulations.
Continued growth led to the acquisition of Mineral Products of Texas in late 2006. The MPT family of Pre-Formed, Precision Cut and Field Pre-formed pipe insulations effectively complements IIG’s overall portfolio of products. Additionally, this Houston based facility brings capabilities that include mineral wool Metal Mesh Blankets, Pipe and Tank Wrap, and mineral wool fittings.

As a result of this on-going strategy, IIG now operates from five manufacturing plants located in Georgia, Louisiana, Colorado, Alabama and Texas. Together, these plants provide customers with quality proven insulation products which are upgraded and enhanced through contemporary technology.

At IIG, we are committed to safety; this pervades our organization and extends to our clients, our colleagues and our industry. We are dedicated to empowering your personnel to make safe choices, strengthening the safety of your process, and protecting our planet. Proper material selection greatly improves efficient use of energy and the industrial sector’s carbon footprint in North America and the world. 

IIG knows that designing insulation systems can be complicated and involves taking many factors into consideration. We create and present educational modules, technical bulletins and product updates to educate designers and encourage discussion regarding design parameters and solutions.

IIG Employment

IIG is looking for various general production positions and various maintenance positions at all of its locations. If you are interested in applying for these positions please download the IIG Employment Application, and submit completed application via email:, or by fax: (281) 605-4710.

To see a listing of current positions available, please click the link at the bottom of the page to visit our Employment Page


December 3, 2014
New Technical Bulletin: Can Coatings Replace Traditional Insulation
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October 2, 2014
Industrial Insulation Group, LLC Creates a Technical Specialist and Specification Team
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