CAFCO® SprayFilm® WB 7

Quick Resources

CAFCO SprayFilm WB 7 / ISOLATEK Type WB 7 Intumescent Fire Resistive Material (IFRM) is a new water-based, intumescent coating designed for the fire protection of interior structural steel.

CAFCO SprayFilm WB 7 / ISOLATEK Type WB 7 introduces new levels of coverage and competitive thickness requirements in the industry. The technological improvements introduced by Type WB 7 also allows for easier application and a more environmentally friendly product.

CAFCO SprayFilm WB 7 / ISOLATEK Type WB 7 provides architects the ability to design using steel that can be decorative and aesthetically pleasing. It can be top coated to match its surroundings and allows steel to be left exposed to view while providing the required fire resistance rating.

  • Water-Based Intumescent coating with zero VOC’s.
  • Provides up to 2-hour fire resistance ratings in accordance with BS476: Parts 20 & 21 compliant assessment per Warrington Fire.
  • Contains no solvents or harmful compounds.
  • Superior performance proven by wide range of testing.
  • Durable, smooth architectural finish.
  • Quick, easy application and clean up.
  • Can be finished with a wide variety of topcoat types and colours.
Product Uses

Wherever an aesthetically pleasing extremely durable finish is desired on exposed steel beams and columns utilized in a variety of open space locations including corporate headquarters, convention halls, atriums, retail facilities, hospitals, airports, rail and bus depots.

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 SprayFilm WB 7 / ISOLATEK® Type WB 7 has undergone the most rigorous testing in accordance with the world’s most demanding safety protocols.

Cellulosic – BS476: Part 20: 1987 – Method of Determination of the fire resistance of elements construction – Fire Resistance Tests, General Requirements

This cellulosic fire test is traditionally used to evaluate materials for use in the protection of modern day commercial structures. This test reaches 576°C (1069°F) after 5 minutes and gradually reaches a temperature of 1153°C (2107°F) after a period of up to 2 hours.

CAFCO SprayFilm WB 7 / ISOLATEK Type WB 7 has been evaluated in accordance with BS476: Parts 20-21: 1987 for periods up to 2 hours on beams and columns which is listed within a UL assessment report.

Major Specifications and Approval Compliance

CAFCO SprayFilm WB 7 / ISOLATEK Type WB 7 has been assessed for jurisdictions in Asia, Oceania and Latin America.

ASTM Physical Performance Standards

Test Performance*
Intumescent Fire Resistive Materials (IFRM’s)

Physical Property

ASTM Standard

CAFCO SprayFilm WB 7

Surface Burning Characteristics


Flame Spread – 0
Smoke Developed – 45

Cohesion / Adhesion (Bond Strength)

ASTM D4541

340 psi (2013 kPa)

Durometer Hardness

ASTM D2240

63 Shore D

Impact Resistance

ASTM D2794

328 in-lb @ 2mm

Abrasion Resistance

ASTM D4060

0.139 g / 1,000 cycles

Product Name

Technical Data Sheet

Safety Data Sheet

Application Guide

Certificate of Compliance

CAFCO® SprayFilm® WB 7

CAFCO SprayFilm WB 7


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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.

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