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Product Information
Hilti, Inc. (U.S.) 1-800-879-8000 www.us.hilti.com • en español 1-800-879-5000 • Hilti (Canada) Corp. 1-800-363-4458 www.hilti.ca
Hilti. Outperform. Outlast.
9/2010
Firestop
System
Firestop Joint Spray
CFS-SP WB
Product description
A sprayable fire-rated mastic for construction joints where
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maximum movement is required
Product features
Sprayable or apply by brush
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Maximum flexibility, meets 500 cycle requirements (Class II and III
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Approval) (ASTM E 1966 and UL 2079)
Quick and easy installation with the Titan 600 or 1100 Sprayers
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can help save you time and money
Contains no halogens, solvents or asbestos
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Water based formulation so spills and over-spray clean up quickly
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and easily
Paintable
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Meets LEED™ requirements for indoor environmental quality credit
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4.1 Low Emitting Materials, Sealants and Adhesives and 4.2 Paints
and Coatings
Areas of application
Top-of-wall joints
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Curtain wall/edge of slab
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Expansion joints
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For use with
Concrete, masonry and gypsum wall assemblies
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Wall and floor/wall assemblies rated up to 4 hours
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Examples
Where a gypsum wall assembly meets the underside of a metal or
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concrete deck
Where a concrete floor assembly meets with non-rated exterior
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wall (concrete, glass, etc.)
Where two concrete floor/wall assemblies meet
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Technical Data*
CFS-SP WB
Density
Approx. 10.8 lb/gal (1.3 g/cm3)
Color
Available in red, white and gray**
Application temperature
39°F to 104°F (4°C to 40°C)
Temperature resistance
-40°F to 176°F (-40°C to 80°C)
Consistency
Sprayable liquid
Chemical basis
Acrylic-water-based-dispersion
Curing time
Approx. 24 hours @ 73°F,
50% humidity for 1/8" depth
Ph-value
Approx. 8-9
Movement capability
Up to 50%
Surface burning characteristics
(ASTM E 84-06)
Flame spread: 5
Smoke development: 10
Sound transmission classification
(ASTM E 90-99)
59
(per tested construction type)
Approvals
• California State Fire Marshal - In progress
Tested in accordance with
• UL 2079     • ASTM E 1966     • ASTM E 84
• UL 1479     • ASTM E 814       • ASTM E 2307
*At 73°F (23°C) and 50% relative humidity
**Gray color requires six (6) weeks lead time
Installation instructions for Firestop Joint Spray CFS-SP WB
Firestop
System
FILL, VOID OR CAVITY MATERIAL
FOR USE IN THROUGH-PENETRATION
FIRESTOP SYSTEMS, AND/OR JOINT
SYSTEMS, AND/OR PERIMETER
FIRE CONTAINMENT SYSTEMS
SEE UL FIRE RESISTANCE DIRECTORY
66Y7
FM
APPROVED
Notice
•	Before handling, read Material Safety Data Sheet and
product label for safe usage and health information.
•	Instructions below are general guidelines — always
refer to the applicable drawing in the UL Fire
Resistance Directory or Hilti Firestop Systems Guide
for complete installation information
Opening
1.	Clean the opening. Surfaces to which Firestop Joint
Spray will be applied should be cleaned of loose
debris, dirt, oil, wax and grease. The surface should
be moisture and frost free.
Application of Firestop Joint Spray
OK&Mineral wool packing: Install the prescribed back
filling material type and depth to obtain desired
rating.
3.	Application of Firestop Joint Spray: Apply Firestop
Joint Spray to the required depth in order to obtain
the desired rating.  Make sure Firestop Joint Spray
contacts all surfaces and overlaps beyond all
surrounding surfaces (Refer to UL System). Titan
Sprayers have been successful in applying Firestop
Joint Spray. Hilti recommends the use of the Titan
600 (for application temperatures above 50°F) or
Firestop Joint Spray may also be brushed on with a
paint brush. Contact Hilti Technical Support for more
information.
4.	Curing time: Allow approx. 24 hours for typical
application thickness (@ 73°F / 23°C) 50% humidity
for 1/8" depth for the Firestop Joint Spray to fully
cure.
5.	Identification: For maintenance reasons all Firestop
Joint Spray applications can be permanently marked
with an identification plate and  fastened in a visible
position next to the seal.
Not for use
•	In areas immersed in water
•	On hot surfaces (above 176°F)
Storage
•	Store only in the original packaging at temperatures
39°F to 77°F (4°C to 25°C)
•	Observe expiration date on package
1. Clean opening
2. Pack in mineral wool
compressed per UL
System
3. Spray or brush on
Firestop Spray
4. Allow Firestop Spray
to cure
5. Fasten identification plate
(if required)
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