Nelson FSP™ Firestop Putty

Moldable, Reusable, and Instant Firestopping

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What's special about moldable firestop?

Constructed of a blend of organic and inorganic intumescent materials that expand with extreme heat to seal voids from exposure to fire and smoke
Pre-mixed material is ready to use right out of the box, so it requires no additional blending, and saves time on the jobsite
Hand moldable, so it requires no specialty tools for installation or adhesion
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Nelson FSP™ is an excellent way to create an instant fire seal. This easy to use mixture can be pressed in place by hand, and requires no special equipment or processes, so installation and cleanup are a breeze. FPS™ is the perfect solution for retrofit applications, and situations in which frequent cabling changes take place.

Part #	Description	Dimensions	Quantity Per Pack	Weight	Price / Pk
NFS-AA458	Nelson FSP Moldable Putty Pad	6" x 7" x 1/8"	1	0.625 lb	Qty: Quick Ship

Reusability is ideal for making changes to your cabling throughway, and convenient for retrofit installations
Putty stays pliable at all times and doesn't set, so it can be easily removed and reapplied
Requires no curing or drying time
Weather resistant for added durability and corrosion resistance
Acoustically tested to reduce the transmission of noise and vibration
For faster installation, no cable derating is needed
3-hour rating complies with ASTM E119 and UL263 for building construction materials
Available as an easy to carry and store putty bar, or as putty pads

Ideal for filling voids on or around:

Metallic and nonmetallic pipes
Insulated pipes
Cables
Duct work
Walls and floors

MSDS (PDF)

Physical Properties
Color	Tan
Density	0.049 lbs / in3
Consistency	7.00mm (Penetrometer)
Activation Temperature	500° F (260° C) Max.
Application Temperature	40° F (4° C) to 110° F (43° C)
Dielectric Strength	>356 v/mil
STC Rating	54

Test Compliance
ASTM E84 Flame Spread - 5 Smoke Developed - 10
ASTM E90
ASTM E814 and UL 1479
ANSI / UL 263
NFPA 70

Approvals
Underwriters Laboratories, Inc "Fill, Void, or Cavity Material (XHHW)", FM, ABS, and USCG City of New York, New York, Department of Buildings
MEA 135-00-M
MEA 196-84-M Vol 3

Storage & Handling
Nelson FSP™ should be stored indoors. Long term storage temperature: 140° F (60° C) maximum. There is no indication of shelf-life limitations. Partially used bars should be re-wrapped in their original packaging before being stored.

MANUALS & USER GUIDES -

FSP™ Putty MSDS (PDF)
FSP™ Putty Installation (PDF)

VIEW OUR GLOSSARY

STI SpecSeal® SSP Putty
Excellent for retrofit jobs. Comes in a 36 cubic inch bar easy to apply and meets the highest quality standards. Use it in metallic conduits, data or electrical power cable penetrations.
3M™ Fire Barrier Pillow
During a fire, it expands and locks itself into place, completely surrounding the penetrant(s) stopping smoke, fire and toxic gases from spreading.
STI Split Firestop Sleeve Kits
Designed with a split pathway and come with wall plates. Weigh half of what competing threaded products do, and have fewer parts.
3M Fire Barrier 2000 Silicone Sealant - 4.5 gallon pail
Ideal for sealing simple penetrations such as around metallic or glass pipes and conduits. Helps limit the spread of noxious gas, smoke and water. Maintains the integrity of fire-rated construction.
Nelson Firestop CPS™ Composite Sheet
Perfect for protecting vital network equipment, this easy-to-install, 2-hour flame rated composite sheet blocks the spread of smoke and flame in through-wall cable penetrations.
Nelson Firestop Bricks
Easy to re-position. When the brick comes into contact with fire, it expands within the opening, forming a solid char that prevents through-penetration of the fire for up to 2 hours.