High Density SFRM

CAFCO® FENDOLITE® M-II/P | Industrial Cementitious Spray-Applied Fire Resistive Material (SFRM)

CAFCO® FENDOLITE® M-II/P meets the requirements of customers seeking a Higher Density Spray-Applied Fire Resistive Material for the protection of structural steel in petrochemical facilities, refineries, and nuclear / power plants.

Backed by rigorous testing and quality control, CAFCO FENDOLITE M-II/P offers substantial physical advantages most notably in the form of superior physical property improvements. The benefit of these significant developments is the assurance of outstanding thermal performance and long term durability that meets and exceeds industry expectations.



  • Built on the proven performance and time-tested track record of CAFCO FENDOLITE M-II.
  • Improved hardness – greater density.
  • Increased flexural strength combats the harsh environments of petrochemical facilities.
  • Improved resistance to cracking and spalling on vital steel sections.
  • Reduced thickness requirements achieve fire ratings with less material and increase application efficiency.
  • Lightweight vs. concrete with less load to the steel structure.
  • Provides the highest level of protection against hydrocarbon fire and blast.
  • Meets or exceeds international hydrocarbon-related Specifications & Approvals including, but not limited to API, NFPA, and Lloyd’s Register.
  • Key tests include UL 1709, Jet Fire, Three-Bar Blast Overpressure with Subsequent Jet Fire, Three-Bar Blast Overpressure with Subsequent UL 1709 and Torch Fire and Hose Stream. CAFCO FENDOLITE M-II/P also passes the requirements of Liquid Nitrogen Immersion and LPG Storage Vessels tests.

Product Uses

Petrochemical fireproofing system - common fire protection


CAFCO FENDOLITE M-II/P protects vital structural steel sections located within industrial hydrocarbon and nuclear facilities. With its improved physical properties including hardness as well as flexural stress, it is ideal for new construction (on or off-site). When used for on-site repair, plants can remain operational while undergoing maintenance.


Petrochemical and Refineries

  • Horizontal and Vertical Vessels
  • Support Legs
  • Saddles
  • Vessel Skirts
  • Sphere Legs and Bracing
  • Piperacks
  • Blockouts

Nuclear/Power Plants

  • Main Reactor Areas
  • Turbine and Generator Structures
  • Spent Fuel Storage Buildings
  • Control Rooms
  • Diesel Generator Rooms

Please visit our Applications Techniques page to view step–by-step instructions of how our CAFCO FENDOLITE fireproofing systems are applied to steel components in Petrochemical facilities and refineries.

Fire Tests & Approvals

In order to meet the criteria set forth by American Petroleum Institute (API), NFPA, Factory Mutual (FM) and alike, CAFCO® FENDOLITE® M-II/P has undergone the most rigorous testing in accordance with the world’s most demanding safety protocols.

UL-1709, BS476: Part 21 - UL-1709

ANSI/UL 1709 Rapid Rise Fire Test of Protection Materials for Structural Steel

This fire test evaluates materials for use in petrochemical facilities and other similar structures that may be subjected to higher levels of heat generated by hydrocarbon-based fires. Unlike cellulosic-based fires, which are evaluated in accordance with test method ANSI/UL 263, ASTM E119, which reaches a temperature of 2000°F (1093°C) over a period of 4 hours, the ANSI/UL 1709 test method reaches 2000°F after five minutes and maintains that temperature over the duration of the test. Only materials tested and classified in accordance with UL 1709 can be used where the risk of a hydrocarbon fire exists.

CAFCO FENDOLITE M-II/P is classified by Underwriters Laboratories for up to 4 hours protection in accordance with the Rapid Rise Fire Test. The specific listing within the UL Fire Resistance Directory is UL Design XR725 >

2nd ANSI/UL 1709, Rapid Rise Fire Test of Protection Materials for Structural Steel (following initial ANSI/UL 1709 Rapid Rise Fire Test)

2nd ANSI/UL 1709, Rapid Rise Fire Test of Protection Materials for Structural Steel (following initial ANSI/UL 1709 Rapid Rise Fire Test) as above however subjecting CAFCO FENDOLITE M-II/P to Two Full Scale UL 1709 Fire Tests within a 24-hour period (tested, allowed to cool to ambient and re-tested).

ANSI/UL1709 Environmental Exposure Tests (Aging, High Humidity, Industrial Atmosphere, Salt Spray, Combined Wet/Freeze/Dry Cycling, Acid Spray and Solvent Spray)

In addition to the required ANSI/UL1709 environmental exposure tests (Aging, High Humidity, Industrial Atmosphere, Salt Spray and Combined Wet/Freeze/Dry Cycling), CAFCO FENDOLITE M-II/P has also been tested under the following conditions:

  • Acid Spray – Exposure of the material (with and without topcoat) to a hydrochloric acid /water fog spray.
  • Solvent Spray – Exposure of the material (with and without topcoat) to a spray applied solvent for 5 cycles. Each cycle consists of the application of the solvent, 6 hour dry time, re-application of the solvent, and dry time of 18 hours.

Gas Explosion Test (3-Bar Blast Overpressure)

Gas Explosion Test (3-Bar Blast Overpressure)

The above test serves to demonstrate the resistance and thermal performance of a fire resistive material subjected to a blast, either by fueled or explosive sources. Steel members protected with CAFCO FENDOLITE M-ll/P were subjected to a blast (having a nominal overpressure of 3 bars) in accordance with Spadeadam Site Test Procedure No. 108. The results following this extensive blast revealed little to no damage to the fire resistive material.

CAFCO FENDOLITE M-ll/P has been issued a Lloyd’s Register Certificate after successfully completing this test.

ISO 22899-1 Determination of the Resistance to Jet Fire

ISO 22899-1 Determination of the Resistance to Jet Fires of Passive Fire Protection Materials

Testing a material’s fire resistance under jet fire has arisen from the industry’s recognition there are fire scenarios more destructive than standard hydrocarbon pooled fires. The jet fire described in ISO 22899-1:2007 involves the sonic release of propane vapor which produces an intense fire ball. The test sample is exposed to a combined radiative and convective heat flux as well as significant erosive forces due to the velocity of the jet.

CAFCO FENDOLITE M-ll/P has been tested and meets the criteria for a J-120 rating in accordance with the ISO 22899-1 Jet Fire Test and is covered in a Lloyd’s Register Certificate.

ISO 22899-1 Jet Fire Test following Gas Explosion Test

ISO 22899-1 Jet Fire Test (following Gas Explosion Test)

This test subjects fire resistive material to high velocity fire and gas explosion replicating what often occurs in practice when a vapor cloud explosion results in a jet fire that produces intense heat and erosive forces from a pressurized fuel source.

CAFCO FENDOLITE M-ll/P meets the criteria of this combined test and carries a Lloyd’s Register Certificate.

NFPA 290 / 58 Annex H Torch Fire and Hose Stream

NFPA 290, NFPA 58, Annex H Standard for Fire Testing of Passive Protection Materials for use on LP- Gas Containers

Subjecting materials to a combination of torch and hose stream testing provides a simulated condition that mimics a fire event to a LP gas storage Vessel- including the potential impingement effects to the vessel when fighting the fire. Isolatek opted for extended torching time in this test to show that the material provides results which exceed the actual industry approval requirements.

CAFCO FENDOLITE M-ll/P has been successfully evaluated to this procedure.

Steel and Concrete Fire Protection Tank Farms - GASAFE - LPG Storage Vessels

Fire Protective Coating for LP- Gas Steel Storage Vessels and Process Structures (Class 4971)

Isolatek International has conducted three major tests on its fire resistive material according to the LP- Gas Steel Storage Vessel and Process Structures industry standard; fire testing, hose stream testing, and heat of combustion testing.

CAFCO FENDOLITE M-ll/P meets this standard and is approved by FM Global (Report No. 3040498) and is listed within the FM Approval guide.

ANSI/UL 1709 Rapid Rise Fire Test (following Liquid Nitrogen Immersion Test)

Exposing a fireproofed steel member to a ten minute cold splash of liquid nitrogen models the cryogenic conditions that can occur in a LNG loading facility. The CAFCO FENDOLITE M-ll/P test sample was submerged in a liquid nitrogen bath and then subjected to a UL 1709 type fire test. The results determined the CAFCO FENDOLITE M-ll/P material was resistant to freezing temperatures, prevented the steelwork from reaching embrittlement temperature, and will survive thermal shock of a fire immediately afterwards.

CAFCO FENDOLITE M-II/P carries a Lloyd’s Register Certificate covering this test.

Major Specification and Approval Compliance

CAFCO FENDOLITE M-II/P meets or exceeds all of the major international Specifications and Approvals, including but not limited to the following:

  • American Petroleum Institute (API) Section 2510, Design and Construction of Liquefied Petroleum Gas Installations (LPG)
  • American Petroleum Institute (API) Section 2510A, Fire-Protection Considerations for the Design and Operation of LPG Storage Facilities
  • American Petroleum Institute (API) Section 2218, Fireproofing Practices in Petroleum and Petrochemical Processing Plants
  • NFPA 58, Liquid Petroleum Gas Code
  • NFPA 502, Standard for Road Tunnels, Bridges and Other Limited Access Highways
  • Factory Mutual 4971, Fire-Protection Considerations for the Design and Operation of LPG Storage Facilities

“CAFCO® FENDOLITE® M-II/P is the most proven and time tested material used within petrochemical and industrial environments in the world.”

Fire protection materials installed within petrochemical and other industrial environments require
resilience to endure extreme conditions for prolonged periods of time. In order to survive these conditions,
fire resistive materials must be able to withstand exposure to solvents, oils, chemicals, mechanical abuse and
direct exposure to weathering conditions.

Through our sophisticated research and development team, Isolatek International develops all of our products
to meet and exceed industry specification guidelines.

Isolatek International utilizes the services of well-known independent third party testing laboratories to evaluate
all of our materials to ensure that owners and designers are receiving the exceptional durability that we publicize.
All of our third party physical property test reports are current and are always available by request.

CAFCO® FENDOLITE® M-II/P has been extensively evaluated in accordance with the following global test methods:

  • ASTM E84, “Standard Test Method for Surface Burning Characteristics of Building Materials”
  • ASTM E605, “Standard Test Methods for Thickness and Density of Sprayed Fire Resistive Material Applied to Structural Members”
  • ASTM E736, “Cohesion/Adhesion of Sprayed Fire Resistive Material Applied to Structural Members”
  • ASTM E761, “Compressive Strength of Sprayed Fire Resistive Material Applied to Structural Members”
  • ASTM E859, “Test Method for Air Erosion of Sprayed Fire Resistive Material Applied to Structural Members”
  • ASTM E937, “Standard Test Method for Corrosion of Steel by Sprayed Fire Resistive Material Applied to Structural Members”
  • ASTM E136, “Standard Test Method for Behavior of Material in a Vertical Tube Furnace at 750˚ C”
  • ASTM D2240, “Test Method for Rubber Property-Durometer Hardness”
  • ASTM E759, “Standard Test Method for Effect of Deflection on Sprayed Fire-Resistive Material Applied to Structural Members”
  • ASTM E760, “Standard Test Method for Effect of Impact on Bonding of Sprayed Fire-Resistive Material Applied to Structural Members”
  • ASTM D790, “Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials”
  • ASTM G21, “Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi”

ASTM Physical Performance Standards Test Performance* Spray-Applied Fire Resistive Materials (SFRMs)
Physical Property ASTM Standard CAFCO® FENDOLITE® M-II/P
Surface Burning Characteristics ASTM E84 0
Density ASTM E605 50-55 pcf (800-881 kg/m3)
Cohesion / Adhesion (Bond Strength) ASTM E736 19,001 psf (910 kPa)
Deflection ASTM E759 No cracks, spalling, or delamination
Bond Impact ASTM E760 No cracks, spalling, or delamination
Compressive Strength ASTM E761 617 psi (4,254 kPa)
Corrosion ASTM E937 Does not promote corrosion of steel
Air Erosion ASTM E859 0.000 g/ft.2 (0.000 g/m2)
Fungal Resistance ASTM G21 Zero Growth After 28 days
Combustibility ASTM E136 Noncombustible
Durometer Hardness ASTM D2240 71+
Maximum Strain ASTM D790 0.0021 in/in (0.05 mm/mm)
Impact Resistance ASTM D2794 Indents at 40 foot pounds (54.2 Nm)
Thermal Properties ASTM C518 Conductivity[k] – 1.82 BTU in/hr ft2 oF @ 75oF
(0.182 W/mK @ 25oC)
Resistance [R/inch]-0.79

*Based on independent laboratory tests under controlled conditions.
+ Value is provided based on Shore DO which more accurately represents a cement based product.