Low Density

ISOLATEK Type II   |   ISOLATEK Type 300   |   ISOLATEK Type 300 AC   |   ISOLATEK Type 300 ES   

ISOLATEK Type 300 HS   |   ISOLATEK Type 3000   |   ISOLATEK Type 3000 ES   |   ISOLATEK Type 300 SB   |   ISOLATEK Type 304

ISOLATEK Type® 300 AC is part of the most innovative and widely specified and used commercial density family of Wet Mix Spray-Applied Fire Resistive Material (SFRM) in the world.

ISOLATEK Type 300 AC is specifically formulated to achieve maximum productivity, creating on-site efficiencies unmatched by any other commercial density Wet Mix SFRM.

Its thermal performance advantages, enhanced physical performance characteristics, and increased productivity, enables ISOLATEK Type 300 AC to emerge as the most advanced Wet Mix SFRM in the commercial construction industry.



  • Up to a 25% increase in productivity compared to ISOLATEK Type 300 results in greater efficiencies during application on-site.
  • Offers the most cost effective fire resistance performance per unit thickness of any commercial SFRM in the world.
  • Exceeds industry in-place physical performance standards.
  • ISOLATEK Type 300 AC provides equal, industry leading thermal performance advantages as ISOLATEK Type 300.
  • 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.

Product Uses

Designed to provide fire protection for up to 4 hour ratings to various floor and roof deck assemblies, steel beams, columns, 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, ISOLATEK Type® 300 AC has undergone the most rigorous testing in accordance with the world’s most demanding safety protocols.

UL 263, ASTM E119 - UL-263

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 537°C (1000°F) after 5 minutes and gradually reaches a temperature of 1093°C (2000°F) after a period of up to 4 hours.

ISOLATEK Type 300 AC is classified by Underwriters Laboratories for up to 4 hours protection in accordance with ANSI/ UL263 and is listed within various UL Designs.

UL Logo commercial wet mix

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.

Major Specification and Approval Compliance

ISOLATEK Type 300 AC complies with the requirements of the following specifications:

  • MasterSpec®, Section 078100 Applied Fireproofing (AIA)
  • MasterFormat® 2014, Section 07 81 00 Applied Fireproofing (CSC,CSI)
  • Unified Facilities Guide Specification, UFGS 07 81 00 Spray-Applied Fireproofing (USACE, NAVFAC, AFCEC, NASA)
  • Master Construction Specifications, Number 07 81 00 Applied Fireproofing (VA)
  • Code of Federal Regulations, Title 40 Protection of the Environment (EPA)
  • PBS-P100, Facilities Standards for the Public Buildings Services (GSA)

ASTM Physical Performance Standards  Test Performance*
Spray-Applied Fire Resistive Materials (SFRM’s)
Physical Property ASTM Standard MasterSpec® Performance Requirements ISOLATEK Type 300 AC
Surface Burning Characteristics ASTM E84 Flame Spread: 10 or less
Smoke Developed: 0
Density ASTM E605 240 kg/m3 (15 pcf) 240 kg/m3 (15 pcf)
Cohesion / Adhesion (Bond Strength) ASTM E736 7.2 kPa (150 psf) 19.7 kPa (412 psf)
Deflection ASTM E759 No cracks, spalling, or delamination No cracks, spalling, or delamination
Bond Impact ASTM E760 No cracks, spalling, or delamination No cracks, spalling, or delamination
Compressive Strength ASTM E761 68.9 kPa (1,440 psf) 151.6 kPa (3,167psf)
Corrosion ASTM E937 Does not promote corrosion of steel Does not promote corrosion of steel
Air Erosion ASTM E859 Max. 0.025 g/ft.2 0.000 g/m2 (0.000 g/ft.2)
Fungal Resistance ASTM G21 Zero Growth After 28 days Zero Growth After 28 days
Combustibility ASTM E136 Noncombustible Noncombustible
Cone Calorimeter ASTM E1354 No Flaming or Heat Release No Flaming or Heat Release
Sound Absorption ASTM C423 0.50 NRC 25 mm (1″) on deck and beam
Thermal Properties ASTM C518 Conductivity[k] – 0.0838 W/m•K @ 24oC
(0.581 BTU in/hr ft2 oF @ 75oF)
Resistance [R/inch]-1.83

*Based on independent laboratory tests under controlled conditions.