The Dow GREAT STUFF PRO™ Gaps and Cracks Insulating Foam Sealant is built to fill gaps up to 3” wide and also provide air-sealing and insulation that can help you save up to 30% on home energy costs.

Build

The gunnable canisters only work with gun dispensers! Use any of the GREAT STUFF PRO Dispensing Guns to direct the foam into the gaps and cracks you want to fill.

Or dispense in any direction by using the provided straw (straw version only) that will help to direct the foam into the gaps and cracks you want to fill.

This product is very sticky and will adhere to metal, masonry, wood, glass and most plastics to create a water-resistant, weathertight, and airtight seal.

Product is trimmable after 60 minutes with a serrated blade and can also be sanded, stained or painted. The surface of this foam can discolor when exposed to sunlight so it is recommended to paint it if this makes a difference to the appearance of the final finished project.

This PRO version of Gaps and Cracks fills, seals and insulates gaps up 3” where the 12 oz. regular version only expands up to 1”!

Safety

Wear eye protection, gloves and protect the area from excess product.

Uncured foam can be cleaned with acetone or GREAT STUFF PRO Gun Cleaner for best results!

Cured foam on hands or surfaces must be removed mechanically or allowed to wear off.

Keep ignition sources away from this foam and use in well ventilated areas.

How to Use - Straw Version

• Shake can vigorously for at least 30 seconds
• Attach straw nozzle onto valve by twisting clockwise
• Dispense slowly and only fill gap about 1/3 full as this product expands!
• Dries orange colored and cures rigid
• Not suitable for being dispensed in cold temperatures
• When finished, BEND straw back onto the plug on the top of the trigger to prevent the product from curing. To reuse, twist the straw on the plug, pull it off and dispense.

NOTE*** This type of dispensing straw will allow you to use the product up to TWO TIMES before the foam will cure itself and make it impossible for the straw attachment to dispense anymore product!

How to Use - Gunnable Version

• Shake can vigorously for at least 30 seconds
• Invert can and screw onto the gun adapter
• Adjust flow control to open positon and immediately squeeze trigger to fill gun barrel with foam
• Dispense a small amount of foam into a waste bin or bag to fully prime gun
• Keep can in inverted position when in use
• Dries orange colored and cures rigid
• Not suitable for being dispensed in cold temperatures
• When flow control is fully closed, the canister can stay on the gun and can be reused within 30 days. Simply shake vigorously and reopen flow control to reuse.

How to Change Cans - Gunnable Version

• Always leave a can on the gun unless it has been thouroughly cleaned with the GREAT STUFF PRO Gun Cleaner
• Shake new can for one minute
• Unscrew old can, immediately screw on new can
• Dispense a small amount of foam into a waste bin or bag to fully prime gun

Technical Data

(Cure rate is based on 70 ± 5°F and 50 ± 5% RH, 1 inch bead diameter, 6 inch length. Cure times depend entirely on temperature, size of foam bead and humidity.)

Certifications, Standards, and Regulations

• UL Classified
• CCMC 13074-L