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FST-MINI
1.5" (38mm) and smaller duct
Reusable!

Polywater®
FST Duct Sealant

Water Block Foam Kit

A Multi-Use, Quick-Setting
Two-Part, Foam-Base
Duct-Sealing System

FST-250
2" (50mm) and larger duct

  • Seal water, dirt, oil, gases, rodents, or other contaminants out of conduit/duct or central office
            Protect your investment in cable, electronics
            Deter copper cable thieves

  • Cured foam is strong, resilient and chemically resistant
            Provides superior protection in adverse field conditions
            and where cable movement is present


  • Can hold 22 feet water-head pressure over an extended period of time

  • Will tolerate cable movement

  • Foam expands and cures quickly even when water is present
            Seal ducts quickly and neatly

  • Two-part foam is mixed in nozzle as it is injected -- no mixing required
            Saves time with no measuring

  • Packages are resealable, no waste

  • Cured foam is semi-permanent and can be removed

  • No known effects on common cable and wire jacketing compounds.

FST Duct Seal is aclosed cell foam, which is superior to “open cell” spray canned foams.  The kit contains a cartridge filled with a two-part foam base, which is mixed in equal parts as it is pushed through a mixing nozzle. When mixed and injected, the foam expands and hardens, keeping water, acids, greases, gases, insects, and rodents, etc., out of the conduit. The foam has good wetting and adhesion to metals, plastics, and concrete. A separate, reusable ratchet application tool is used to inject the foam.

Polywater® FST Duct Seal

A properly constructed FST Duct Seal example is shown at right in the clear conduit demo.   Note the placement of the "damming" strips wrapped around the cables.   The dams create the void into which the liquid FST foam is injected and hold the rapidly expanding foam in place while it cures.
For additional information read the Application Instructions for FST-250 or FST-MINI, or watch the Installation Video for FST-250 or FST-MINI.

The FST Duct Seal example shown at right is a cross-cut duct to show FST closed cell foam technology at work surrounding the cable to maintain a good seal.



FSTDuct Sealant is available in two cartridge sizes. FST-250 is used for 2-inch (50mm) or larger conduits and comes in a multi-use single-plunger caulking tube that uses a standard high-ratio caulking tool (TOOL-250). FST-MINI is used for 1.5-inch (38mm) and smaller conduits. It comes in a dual 50 ml cartridge with 1:1 ratio. TOOL-50-11 is needed to apply FST-MINI. FST foam wets and adheres to metals, plastics, and concrete, and can seal ducts of different sizes, base materials, and shapes. It conforms around complex cable fill configurations. A kit contains everything required to install the duct block (application tools available separately).



ORDERING INFORMATION
Catalog # Description Units/CS Image
FST-250 for use in 2" (50mm) and larger duct
FST-250KIT1

1 8.5-oz two-part Foam Sealant caulking tube style (cat# FST-250)
3 Mixing nozzles
4 24" Foam damming strips (cat# FST-DAM)
1 24" Abrasive strip
1 Pair disposable gloves
1 Positioning rod for foam dam
1 Pre-treating wipe (cat# HP-P158ID)
1 Resealing cap
1 Instruction sheet
TOOL-250 SOLD SEPARATELY (TOOL-250)

1
FST-250KIT

Same as FST-250KIT1 (sold 6 per case)

6
FST-250

1 8.5-oz two-part Foam Sealant caulking tube style (cat# FST-250)
1 Mixing nozzles
1 Resealing cap

12
MXR-30T-10

Mixing Nozzle 10-pack for FST-250

1 None
TOOL-250

1 High-ratio caulking gun

1
FST-DAM

1 24" Foam damming strip

24 None
FST-MINI for use in 1.5" (38mm) and smaller duct
FST-MINI-1

50-mL cartridge – 1
Mixing Nozzles - 2
Foam Discs - 6
Pair of disposable gloves - 1
Instruction Sheet - 1

1
FST-MINI-1G

Same as kit above
Includes TOOL-50-11

1 None
FST-MINI-B6

6 FST-MINI-1

1 None
FST-MINI-B6G

6 FST-MINI-1
Includes TOOL-50-11

1 None
TOOL-50-11

Dispensing Tool for FST-MINI

1
MXR-20T-10

Mixing Nozzle 10-Pak for FST-MINI

1
Cleaners
HP-P158ID

1 Conduit pre-treating cleaning wipe

144

View the flyer for FST-MINI

Click here for an MSDS on this product

Click here to Request a Quote on this product

Click here to Add Your Name To Our Mail List

FST lab report on Water Sealant Comparisons

View a Demonstration Video on FST (in CHINESE)

Click here for a Spec Sheet or Español on this product

View the flyer in PDF or Español or Português or Chinese 

Download the FST Foam Quantity Calculator or en Español

For more information on duct sealing read our Instructions For Use

For more information on health hazards read our Urethane Safety paper

View a Demonstration Video on FST using a 4 inch duct

Important Notice: The statements and information here are made in good faith based on tests and observations we believe to be reliable. However, the completeness and accuracy of the information is not guaranteed. Before using, the end-user should conduct whatever evaluations are necessary to determine that the product is suitable for the intended use. The user assumes all risks and liability in connection with such use. The statements contained herein are made in lieu of all warranties, express or implied, including, but not limited to, implied warranties of merchantability and fitness for a particular purpose, which warranties are hereby expressly disclaimed. American Polywater's only obligation shall be to replace such quantity of the product proven to be defective. Except for the replacement remedy, American Polywater shall not be liable for any loss, injury or damage, direct or indirect, arising from the use or the failure to properly use these products, regardless of the legal theory asserted. The foregoing may not be altered except by a written agreement by the officers of American Polywater Corporation.

Ask for Polywater® products by name at your local authorized distributor.

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