Quick Resources
Why not just use concrete unprotected?

Concrete does not burn, but when exposed to rapid thermal impact it will spall either progressively or explosively. CAFCO® FENDOLITE® M-II / ISOLATEK® Type M-II provides predictable performance under fire and prevents concrete from spalling under the most severe fire exposure conditions. CAFCO FENDOLITE M-II / ISOLATEK Type M-II is more resistant to cracking and spalling compared to concrete. It prevents concrete spalling under impact and thermal shock and is more resistant to effects of deluge water. If damage to the spray fireproofing system occurs, repair is quick and easy and traditionally do not require tunnel shut-down.

How long has the CAFCO® FENDOLITE® M-II / ISOLATEK® Type M-II product been in the market?

CAFCO FENDOLITE M-II / ISOLATEK Type M-II has been the preferred choice worldwide for over thirty years with over tens of million of bags installed within commercial, tunnel, manufacturing, petrochemical and other similar industrial facilities globally.

How is CAFCO® FENDOLITE® M-II / ISOLATEK® Type M-II installed?

CAFCO FENDOLITE M-II / ISOLATEK Type M-II is a single package material which requires only water as an activator. CAFCO FENDOLITE M-II is applied using a rotor stator type pump utilizing water and compressed air. CAFCO FENDOLITE TG / ISOLATEK Type TG is the trowel grade version which is applied using common masonry tools. You can find out more information on equipment by visiting our Equipment & Accessories Section.

Who can install ISOLATEK® Products?

Isolatek International has a Global Network of licensed professional installers. The thorough training we provide ensures that the job is done correctly with maximum attention to quality and safety. The installers are experienced and have earned the trust of contractors and engineers throughout the world.

Do your products contain asbestos?

All products manufactured by Isolatek International contain no detectable asbestos. Ensure that all fire protection material suppliers provide independent test verification per EPA/600/R-93/116.

Why should CAFCO® FENDOLITE® M-II / ISOLATEK® Type M-II be used to protect concrete linings in Tunnels?

Isolatek International offers a complete system utilizing CAFCO FENDOLITE M-II / ISOLATEK Type M-II as the basis of fire protection for cut and cover, immersed tube and bored tunnels. This system has been extensively tested and exceeds the requirements set forth by the International fire curves and standards.

Is a topcoat necessary for certain types of applications?

A topcoat is not necessary, however, a portland cement compatible topcoat is recommended in order to improve light reflectance and washability in road tunnels.

Has CAFCO® FENDOLITE® M-II / ISOLATEK® Type M-II been used in various environments throughout the world?

Yes, CAFCO FENDOLITE M-II / ISOLATEK Type M-II is the preferred choice worldwide for use in Petrochemical, Tunnels and other heavy industrial facilities from the North Slope oil fields of North America to the Southern tip of South America; from Europe and Asia to the Middle East, Africa, and Australia; there is not any geographical location where CAFCO FENDOLITE M-II / ISOLATEK Type M-II isn’t in use.

Can FENDOLITE® be applied to existing tunnels?

Yes, due to its ease of application and flexibility around complex shapes, CAFCO FENDOLITE M-II / ISOLATEK Type M-II is suitable to application to all types of existing tunnel structures.

How can I obtain a technical letter or engineering judgement?

You can obtain Technical Letters, Submittal Information and Engineering Judgments by contacting Isolatek Technical Services via our Hotline at 800-631-9600 (Option 1), Fax at 973-347-6730 or email at

All Isolatek International technical related letters and documentation must be issued through the Isolatek International Corporate Technical Services Department.

Quality Risk Assessment

Isolatek International is able to assist in the development of appropriate structural fire protection solutions for any tunnel whether it is road, rail or metro.

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Our unsurpassed technical support and recognized applicator network.

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ISOLATEK INTERNATIONAL provides passive fireproofing materials under the CAFCO® and FENDOLITE® trademarks throughout the Americas and under the ISOLATEK® trademark throughout the world.

Isolatek International
41 Furnace Street
Stanhope, NJ 07874
800-631-9600 | 973-347-1200

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