How to Seal Glass with ProTool 3 Star Barrier

Glass sealing with ProTool 3 Star Barrier is an easy, low-cost way to add long-lasting protection to glass and other smooth, non-porous surfaces. This professional protectant creates an invisible molecular layer that helps guard against scratching while repelling liquids and dirt, making future cleanings faster and more effective. When used as part of a regular maintenance schedule, glass sealing with ProTool Barrier keeps windows clearer between visits and helps prevent costly restoration work.

What ProTool Barrier Does

ProTool Barrier forms a molecular bond to glass, ceramic, porcelain, and other non-porous, glass-like surfaces, leaving behind an invisible protective film. This barrier helps shield the surface from light scratching while also repelling liquids, grime, and airborne contaminants.

In real-world conditions, that means less buildup from hard water, masonry run-off, and atmospheric pollution between cleanings. It is designed for clarity, so it will not yellow, cloud, or haze, even after months of exposure.

Protection and Longevity

One of the biggest advantages of using ProTool Barrier for glass sealing is the balance between cost, coverage, and durability. A single 6.4 oz bottle makes approximately 1.1 gallons of ready-to-use protectant, giving you excellent coverage across multiple jobs.

Once applied, the protection typically lasts between 4–8 months, depending on exposure, weather, and cleaning frequency. When stored in a sealed bucket, the mixed solution remains usable for about 60 days, allowing you to treat many different sites from one mix.

Ideal Use Cases for Glass Sealing

ProTool Barrier is a smart choice when the goal is to protect glass from hard water stains and environmental buildup between routine cleanings. If you are servicing glass on a schedule of quarterly to every six months, this is the protectant to choose.

It works especially well on:

• Residential windows exposed to sprinklers or irrigation.

• Commercial glass subjected to pollution and masonry run-off.

• Other glass-like, non-porous surfaces that need added protection between visits.

Why Choose ProTool Barrier for Glass Sealing

ProTool Barrier Protectant 6.4oz

$52.20

Barrier is an easy-to-mix, easy-to-apply surface protectant.Barrier forms a bond to glass, ceramic, porcelain, and other non-porous glass-like surfaces to form an invisible molecular barrier...… read more

For professional window cleaners, ProTool Barrier offers a strong value proposition. It delivers months of protection while remaining one of the lowest cost glass sealing options available per square foot of coverage.

Because it integrates seamlessly into a standard mop-and-squeegee workflow, there is no need for specialized tools or extra steps beyond a simple second pass with the mixed solution. That makes it easy to upsell as a “protection treatment” after a normal or restorative clean.

Step 1: Clean the Glass Thoroughly

Effective glass sealing always starts with preparation. ProTool Barrier locks in the condition of the surface, so any stains or defects left behind will remain under the coating.

Before you apply the protectant:

• Clean the glass thoroughly to remove dirt, film, and residues.

• Remove hard water stains, mineral deposits, and masonry run-off where present.

• Confirm there is no existing protective coating or low-e coating on the exterior surface of the glass, as ProTool Barrier is not intended for those surfaces.

Step 2: Mix ProTool Barrier

Once the glass is properly cleaned, you are ready to prepare the glass sealing solution. Mixing is straightforward and designed to match standard window cleaning practices.

To mix the protectant:

• Pour the entire 6.4 oz bottle of ProTool Barrier into 1 gallon of clean water.

• Use a clean bucket to avoid contamination from soap or debris.

• Stir or gently agitate the solution to ensure it is evenly blended.

Step 3: Apply the Glass Sealing Solution

Application is where ProTool Barrier really shines in terms of simplicity. You are essentially “cleaning” the window a second time, but now with the protectant solution.

Follow these steps:

• Use a fresh, clean mop that is dedicated to the barrier solution.

• Dip the mop into the 1-gallon mix and apply the protectant evenly over the glass surface.

• Work methodically to ensure full, uniform coverage with no dry spots.

Step 4: Squeegee Clear for a Perfect Finish

After application, the final step in the glass sealing process is to remove the excess solution while leaving the invisible barrier behind. This is done just like a standard window clean.

To finish the application:

• Squeegee the glass clear, using smooth, overlapping strokes.

• Wipe edges, frames, and sills as needed to remove any drips.

• Allow the surface to dry; the molecular barrier will remain on the glass, providing months of protection.

Important Application Restrictions

For best results and to avoid compatibility issues, ProTool Barrier should not be applied to glass that already has an exterior protective or low-e coating. These surfaces may not allow the product to bond correctly or could react unpredictably with the existing layer.

Always verify the type of glass and any manufacturer coatings before offering glass sealing as an add-on service. This quick check helps ensure performance and protects both you and your client’s investment.

Conclusion

ProTool Barrier makes glass sealing simple, effective, and affordable for professional window cleaners and maintenance teams. By forming an invisible molecular barrier that resists scratching, repels liquids and dirt, and protects against hard water stains, masonry run-off, and atmospheric pollution, it keeps glass looking better for longer between cleanings. With one 6.4 oz bottle making 1.1 gallons of solution, 60 days of bucket life, and 4–8 months of on-glass protection, ProTool Barrier delivers high performance and low cost in a straightforward mop-and-squeegee process that fits easily into any regular window cleaning routine.

👉 Shop ProTool Barrier Protectant