• Product Details
    Unbeatable reach and ease, Great Stuff Pro™ 14 XL Dispensing Gun features an extra-long barrel and specially designed guide tip to align gun over framing lumber, providing professionals with precision and control, even while standing.
    • Features a 40” barrel for accessing hard-to-reach areas and dispensing while standing
    • Lightweight, high-strength aluminum body with a metal trigger
    • Flow-control mechanism dispenses beads from 1/8” to 3”
    • Non-stick coated can adapter and needle
    • Large flow control knob with secured back-screw system
    • Replaceable smooth dispensing nozzle
    • Works with all GREAT STUFF PRO™ cans
    • No-drip dispensing
    • Includes forked guide tip
  • Q.

    The Great Stuff Pro™ Gasket Gun looks similar to Great Stuff Pro™ polyurethane foam guns. Can I use one of those?


    No. Great Stuff Pro™ Gasket is water-based, whereas one-component polyurethane reacts with water to cure. Mixing the two would permanently clog the gun.

    The Great Stuff Pro™ Gasket Dispensing Gun has a Blue Handle which matches the Blue Collars on its can. This is a visual check to only use Blue Guns with Blue Collars, and Black Guns with Black Collars.


    What is the difference between Great Stuff™ and Great Stuff Pro™ products?


    There are two key differences between Great Stuff™ and Great Stuff Pro™ products:

    • Great Stuff™ uses a straw dispenser; Great Stuff Pro™ has both straw- and gun-applicator options to dispense foam.
    • Can sizes are larger with Great Stuff Pro™ series, so yield is greater.

    Can I clean the Great Stuff™ Black gun?



    1. Unscrew used Great Stuff Pro™ from dispensing gun.
    2. Clean the gun basket and tip by generously spraying and removing uncured foam with Great Stuff™ Foam Cleaner.
    3. Invert the can and install the cleaner onto the dispensing gun.
    4. Press the trigger to flush the foam into waste receptable until only the cleaner is visible.
    5. Allow gun to sit for several minutes and repeat with a second flush.
    6. Remove the can from the dispensing gun and spray into waste receptacle without the can until the gun is completely empty.
    • Shake vigorously for a minimum of 60 seconds. If the can sputters, simply shake the can while held upside down.
    • Any uncured product that gets on the skin can be removed with acetone.  
    • Best results if used when product temperature ranges from 60-90°F (15-32°C). The can should not be exposed to temperatures more than 120°F. Cured foam should not be exposed to temperatures in excess of 240°F.
    • Firmly screw straw assembly onto valve and dispense SLOWLY.
    • Mist with water to speed cure.
    • Trim cured foam with serrated blade.
    • If applied outdoors, be sure to paint or cover foam to prevent discoloration and UV damage.

    If using Great Stuff Pro™ with the Foam Dispensing Gun, follow these additional steps before application:

    • With the can secured, set your desired bead size by adjusting the flow control knob on the back of the gun (bead can be adjusted from 1/8"-3"). Then, pull the trigger to fill the gun with foam, dispensing excess foam into an appropriate waste receptacle. Lastly, test the bead size before applying.
    • Tighten the flow control screw until fully closed for storage. Use can within 30 days of initial use.
    • Store upright with a foam dispensing gun attached.
    • Fill gaps <50%
    • Always leave a can of foam attached to the gun with the flow control screw closed.
    • When ready to change cans, shake the new can of foam for a minimum of 60 seconds.
    • NEVER leave a gun without a can of adhesive without a can of Great Stuff Pro™ attached unless the gun has been thoroughly cleaned with Great Stuff™ Foam Cleaner.

When to Use



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Uses a flow-control mechanism that dispenses beads from 1/8” to 3” to provide greater precision and access to hard-to-reach areas.


Extends the life of your GREAT STUFF PRO™ Dispensing Gun by dissolving uncured product from the valve, tip and collar of the gun



Bonds to wood, metal, masonry, glass and most plastics to fill gaps and cracks up to 3" while blocking the spread of smoke.



Provides a fast-grab tack and long-term high-strength bond, even in conditions, leading to fast and reliable installations