Specified Technologies, Inc. - WF300 Intumescent Firestop Caulk

WF300 Intumescent Firestop Caulk

Category: firestop caulks | firestopping sealants | intumescent firestopping...

MasterFormat: Penetration Firestopping | Joint Firestopping | Joint Protection...

Specified Technologies, Inc.
210 Evans Way
Somerville, NJ 08876
Tel: (800) 992-1180
Fax: (908) 526-9623



Find a rep/distributor

Request More Info


Related Products


WF300 Intumescent Firestop Caulk

BlazeStop® WF300 Intumescent Firestop Caulk is a latex-based firestop caulk designed for residential wood frame construction. WF300 Caulk is tested for addressing penetrations through wood/frame construction such as wood stud walls and floor/ceiling assemblies. Under fire exposure, WF300 expands to up to four times its original volume.

  • Installer friendly, easily applies with standard caulking gun
  • Suitable for combustible and non-combustible penetrants
  • Tested for up to 3 Hours of fire exposure when tested to ASTM E814/UL1479

See More


Ordering Information
Item # Case Qty. (min) Qty. UPC # 730573 Description Weight
WF310 12 1 9710 10.1 oz. Tube (18.2 Cu. In., 300 ml) .94 lbs (0.42 kg)
WF305 n/a 1 9705 5 gal. Pail (1155 Cu. In.,19.0 L) 58 lbs (26.3 kg)
WF320 12 1 9720 20 oz. Sausage (36 Cu. In., 592 ml) 1.59 lbs (0.72 kg)
Physical Properties
Color: Red
Odor: Mild Latex
Density: 11.4 lbs/gal (1.36 kg/L)
Solids Content: 0.81
pH 7.4 to 8.4
Max In Service Temperature 120º F (49º C)
Flame Spread 0
Smoke Developed 20
STC Rating (ASTM E90/ASTM C919) 61
VOC Content
(EPA Method 24/ASTM D3960) 33.3 lb/gal. (40.0 g/L)
Expansion Begins 350º F (176º C)
Volume Expansion: >5X Free Expansion
Shelf Life: 2 Years
Sweets app for Revit – Learn More