Great Stuff Pro Gaps & Cracks Spray Foam Kit - Fire Rated Orange

In this review the Great Stuff Pro Gaps & Cracks Spray Foam Kit is evaluated for contractors and serious DIYers who need a code-compliant, ready-to-use fireblocking foam. The kit stands out because it bundles gun-grade foam, a reusable dispensing gun, cleaner and gloves so users have everything on hand to seal larger penetrations up to 3 in; the biggest reason to buy is the combination of a fireblock-rated orange formula and a reusable gun that reduces waste and makes multiple jobs faster.

Key Features

• Complete kit: Includes two 24 oz cans, a foam dispensing gun, cleaner, nozzles, extension straws and nitrile gloves so users can start sealing immediately without hunting for accessories.
• Seals gaps up to 3 in: Expands to fill and insulate larger penetrations around framing, pipes, vents and sill plates, forming a water-resistant, airtight barrier.
• Fireblock rated: The orange formula is designed to slow the spread of flames and smoke through concealed spaces and meets fireblocking needs for code compliance.
• Reusable gun-grade formula: The valve can be closed and the can remain pressurized on the gun for future touch-ups, reducing product waste between uses.
• Energy savings: Helps reduce heating and cooling loss from air leaks, improving efficiency and potentially lowering utility bills when used to seal common leak points.
• Fast-setting: Tack-free in about 3 to 10 minutes and trim-ready in about 60 minutes, enabling efficient workflow on job sites or home projects.

Who It's For

The kit is best for builders, remodelers and experienced DIYers working on larger gaps or multiple penetrations where fireblocking and durability matter. It suits jobs that require both insulation and code-compliant fireblocking, such as around plumbing stacks, electrical runs and sill plates.

Less suitable for very small, delicate sealing tasks where precision low-expansion foam is required, or for users who need colorless or non-fireblock formulations; also outdoor applications require painting for UV protection as the foam needs protection from direct sunlight.

Pros & Cons

Pros

• All-in-one kit saves time on setup and includes cleaner and gloves for safer handling.
• Reusable gun-grade system lets users control dispense and preserve remaining foam for future use.
• Orange fireblock formula provides clear identification and helps slow flame and smoke spread in concealed spaces.
• Strong adhesion and expansion fill larger gaps up to 3 in, improving insulation and reducing drafts.

Cons

• Some users report mixed impressions of long-term durability and stickiness compared with other formulations.
• Exposed foam must be painted for UV protection if used outdoors, adding an extra finishing step.

Specifications

Brand	GREAT STUFF PRO
Kit contents	2 x 24 oz cans, foam gun, 4 nozzles, 4 extension straws, 12 nitrile gloves, 12 oz cleaner
Gap capacity	Seals gaps up to 3 in
Fire rating	Fireblock rated (orange color)
Set time	Tack-free ~3-10 minutes; trim-ready ~60 minutes
Use	Interior and exterior (paint for UV protection)
Formula	Reusable gun-grade foam

Our Verdict

The Great Stuff Pro Gaps & Cracks Spray Foam Kit is a practical, cost-effective choice for professionals and experienced DIYers who need a fireblock-rated, gun-dispensed foam that fills larger openings and reduces drafts. The reusable gun and complete accessory set make it a good value for multi-job use, though those seeking the absolute highest long-term adhesive performance should compare formulations for specific substrates.

Frequently Asked Questions

Can the gun stay attached between uses?
Yes, the kit uses a reusable gun-grade formula and the valve can be closed so the can remain pressurized on the gun for future applications.

Is this suitable for exterior use?
Yes for sealing, but exposed foam must be painted for UV protection when used outdoors.

What size gaps can it fill?
The foam expands to fill gaps up to 3 in and is intended for larger penetrations around pipes, vents and framing.