Seal the Gaps You Can’t See: Why Great Stuff Pro™ Gasket Matters More Than You Think
When we talk about energy efficiency, most people think about insulation in the walls or attic. But here’s the truth: even the best insulation can’t do its job if air is slipping through hidden cracks around your framing.
That’s exactly where Great Stuff Pro Gasket comes in.
This isn’t your typical spray foam. It’s a smart, purpose-built gasket-in-place foam designed to create an airtight seal between drywall and framing — helping you build tighter, more energy-efficient structures from the inside out.
What Is Great Stuff Pro™ Gasket?
Great Stuff Pro™ Gasket is a one-component, water-based flexible foam that’s applied directly to framing lumber before drywall goes up.
Instead of filling large gaps like traditional expanding foams, this product creates a continuous compressible bead that dries into a durable, flexible gasket. Once the drywall is installed, that bead compresses — forming an airtight seal behind the wall surface.
It’s specifically designed for:
- Top plates
- Bottom plates
- Inside and outside corners
- Rough openings around windows and doors
Why It Matters: The Hidden Air Leak Problem
Air leakage doesn’t just happen around windows and doors. One of the biggest offenders?
- The top plate leaking into the attic
- The bottom plate and rim joist leaking to the exterior
Testing shows that when applied at the upper top plate, bottom plate, and vertical studs of an 8x8 wall, Great Stuff Pro™ Gasket blocked 98% of air leakage compared to no gasket.
That’s a serious performance upgrade for something that installs in minutes.
How It Works
Application is simple:
- Apply a continuous 1/2 inch bead to the interior face of framing lumber
- Let it dry (typically about 6 hours, up to 24 hours in high humidity)
- Install drywall normally
Once compressed behind the drywall, it forms a durable, airtight gasket.
Even better:
- It’s water-based
- Tools and spills clean up with water before cure
- No power tools required — it installs from an aerosol can using the designated Pro Gasket Dispensing Gun
Performance Highlights
Here’s what makes it stand out on the jobsite:
Flexible & Durable: It withstands drywall installation and remains compressible behind the wall
Tested & Verified: ASTM E84 surface burning characteristics
ASTM E283 air leakage testing (modified to measure gasket effectiveness)
Flame Spread / Smoke Developed: Rated 0 / 0 under ASTM E84 testing conditions
Efficient Yield:
Depending on bead size, each 18 ounce can delivers:
- 360 linear feet at 3/8 inch bead
- 200 linear feet at 1/2 inch bead
- 130 linear feet at 5/8 inch bead
Important Things to Know
Like any professional-grade product, proper use matters.
- Apply between 32 degrees Fahrenheit and 100 degrees Fahrenheit
- Optimal can temperature: 60 to 90 degrees Fahrenheit
- Not a fireblock material
- Not compatible with moisture-curing polyurethane foams
- Shelf life: 12 months when stored at 75 degrees Fahrenheit
Also important: this product requires the Great Stuff Pro™ Gasket Dispensing Gun (blue handle). It is not compatible with polyurethane foam guns
Who Should Be Using This?
Great Stuff Pro™ Gasket is ideal for:
- Professional builders
- Remodelers
- Energy-conscious contractors
- Anyone focused on meeting tighter building envelope standards
If you’re building to modern energy codes — or simply want to reduce callbacks related to drafts and air leakage — this product is a smart addition to your process.
Air sealing isn’t always visible when the job is done — but it absolutely shows up in performance.
Great Stuff Pro™ Gasket offers a simple, efficient way to tighten up the building envelope before the drywall ever goes up. No complicated steps. No specialized equipment beyond the dedicated gun. Just a smarter approach to sealing framing connections.
If you're serious about energy performance, durability, and cleaner installs, this is one of those products that quietly improves the entire system.
And sometimes, the best building upgrades are the ones no one ever sees.
Ready to Seal Smarter?
If you're looking to tighten up your builds, reduce air leakage, and deliver stronger energy performance from the inside out, it starts with the right materials.
Get Great Stuff Pro™ Gasket at AWarehouseFull.
We stock professional-grade sealants and jobsite solutions contractors trust — shipped fast and backed by real product knowledge from a team that understands building materials.
- Seal it right the first time.
- Build tighter.
- Build smarter.