GREAT STUFF PRO™ Gaps & Cracks Polyurethane Foam Sealant is a gun-applied, insulating foam sealant that expands up to 3 inches to take the shape of gaps, creating a long-lasting, water-resistant and fireblock seal around plumbing and electrical, in basements, attics, and more.

• Expands to fill, seal, and insulate gaps up to 3 inch (76mm)
• Reusable for 30 days when left attached to GREAT STUFF PRO™ Dispensing Gun
• Forms a long-lasting, airtight, weather-resistant seal (GS-119)
• Helps keep insects, moisture/condensation and allergens out (GS-121)
• Adheres to wood, metal, masonry, glass and most plastics
• Fireblock formulated
• Interior/exterior use¹
• Tack-free in 3-10 minutes²; trimmable in one hour
• Paintable, stainable and sandable (GS-120)
• Orange-colored foam for easy inspection identification
• UL classified

 ¹ Skin of cured foam can discolor if exposed to natural light. Paint or coat foam for the best results. 

² 70 ± 5°F and 50 ± 5 % RH, 1-inch bead diameter, 6-inch length. The cure rate is dependent on temperature, humidity, and size of the foam bead. 

• 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.