CAFCO® 304
ISOLATEK® Type 304

Quick Resources

CAFCO 304 / ISOLATEK Type 304 is a commercial density, Wet Mix Spray-Applied Fire Resistive Material (SFRM) specifically designed to provide 4 hour fire resistance ratings on floor assemblies and supporting structural members.

  • Meets or exceeds all major fire protection specifications for Commercial structures including ANSI/UL 263, ASTM E119, CAN/ULC-S101.
  • Offers LEED building credits for recycled content.
  • Exceeds physical performance standards for fire protection and durability to impact.
  • Excellent choice for concealed environments.
Product Uses

Designed to provide up to 4 hour fire protection for various floor and deck assemblies, steel beams, and joists in commercial construction projects.

Fire Tests & Approvals

In order to meet the performance and durability criteria set forth by the American Institute of Architects (AIA) and other major industry specifying organizations, CAFCO 304 / ISOLATEK Type 304 has undergone the most rigorous testing in accordance with the world’s most demanding safety protocols.

Cellulosic – ANSI/UL263 (ASTM E119) – Fire Tests of Building Construction and Materials

This cellulosic fire test is traditionally used to evaluate materials for use in the protection of modern day commercial structures. This test reaches 1000°F (537°C) after 5 minutes and gradually reaches a temperature of 2000°F (1093°C) after a period of up to 4 hours.

CAFCO 304 / ISOLATEK Type 304 is classified by Underwriters Laboratories for up to 4 hours protection in accordance with the cellulosic fire test and is listed within various UL Designs.

UL Classification Mark

The UL Classification Mark indicates compliance with global requirements as it relates to a specific risk or casualty. With the Classification service, UL determines that a manufacturer has demonstrated the ability to produce a product complying with UL’s requirements with respect to one or more of the following:

  • Specific risk, e.g., casualty, fire, etc.
  • Performance under specific conditions
  • Compliance with regulatory codes
  • Compliance with specific standards such as international standards
  • Other condition, as determined by UL

All of the products carrying a UL Classification Mark are covered by UL’s Follow-Up Services program to verify that products carrying the UL Classification Mark continue to be manufactured in compliance with UL’s safety requirements.

ASTM Physical Performance Standards

Test Performance*
Spray-Applied Fire Resistive Materials (SFRM’s)

Physical Property

ASTM Standard

MasterSpec® Performance Requirements


Surface Burning Characteristics


Flame Spread: 10 or less
Smoke Developed: 0




15 pcf (240 kg/m3)
Meets or Exceeds 15 pcf (240 kg/m3)

Cohesion / Adhesion (Bond Strength)


150 psf (7.2 kPa)

>400 psf (19.1 kPa)



No cracks, spalling, or delamination

No cracks, spalling, or delamination

Bond Impact


No cracks, spalling, or delamination

No cracks, spalling, or delamination

Compressive Strength


1,440 psf (68.9 kPa)

>4,000 psf (191.5 kPa)

Fungal Resistance


Zero Growth After 28 days

Zero Growth After 28 days

*Based on independent laboratory tests under controlled conditions.

Product Name

Technical Data Sheet

Safety Data Sheet

Application Guide

Certificate of Compliance

CAFCO® 304
ISOLATEK® Type 304

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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
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Stanhope, NJ 07874
800-631-9600 | 973-347-1200

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