Best Commercial Metal Roof Coating
ArmorGarage Metal Roof Coating is specifically designed to stop your roof leaks and guaranteed for 12 years to keep your roof leak-free.
Metal Roofs Require Specialized Solutions
Metal roofs present unique challenges that differ from rubber or asphalt-based roofs: Large amounts of expansion and contraction, rust, painted surfaces not conducive to coating (especially oil-based enamel paints with very smooth finishes), screw and lap joints.
Self-Plasticizing Epoxy & Rubber Fortified Acrylic
Armor Metal Roof Coating is a self-plasticizing epoxy and rubber fortified acrylic that provides a monolithic encapsulating coating. Cannot be compared to water-based, silicone coatings, or Home Improvement store brands. Those types are all known for premature failures.
Real Customer Results
Military-Proven Performance: Beale Air Force Base
After years of durability and performance issues with every type of water-based and silicone roof coatings, Beale Air Force Base has made ArmorGarage Metal Roof Shield the standard coating for the entire base.
We developed custom color BAFB-Khaki Tan for them. The following images are from support buildings in close proximity to the B1 runway that required special color PMS-411.
Hail Storm Survival: 100-Year-Old Historic Roof
Professional Application: Alpenrose Inn, Vermont
David, owner of Alpenrose Inn in Bondville, VT, was having continuous leak issues with his painted metal roof. After years of quick fixes with other products that never lasted, he took the following steps for a long-term solution:
David is extremely happy with the product and results—can now go on with daily business without worrying about roof leaking on guests every time it rains or snows.
Additional Before & After: Self-Storage Facility
Your Armor Metal Roof coating should last 15-20 years with minimal common sense maintenance. At which time you can apply one new coat to bring your roof back to new.
How to Apply Metal Roof Coating
Complete application guide β from cleaning and repair through final coat. Brush, roll, or spray. No prior experience required.
Coverage Calculator
Coating is applied at 100 sq ft per gallon and two coats are required. Use these formulas to determine how much product you need:
Expert Support: If you or your installer has any questions, we're happy to help. Our techs have helped customers install millions of square feet of this product.
Clean & Inspect the Roof
First, thoroughly clean and remove all dirt, mold, mildew, and rust from the roof.
Heavily Rusted Metal Roofs: Apply a paint-compatible rust inhibitor primer and let dry thoroughly according to the manufacturer's instructions before proceeding.
Always Test for Adhesion: Apply ArmorGarage Special Bonding Primer if the metal is painted or if the coating does not bond to the rust inhibitor.
Post-Cleaning Inspection
We always recommend a thorough inspection after the roof has been cleaned. A very dirty or corroded roof can hide issues. Look for:
- Split or wider-than-normal seams
- Loose or missing screws β retighten loose screws and replace stripped ones with oversized metal roof screws (easily obtained online)
- Cracked or dry, brittle flashing
- Roof penetrations β vent pipes, exhaust fans, HVAC equipment curbs
Not Sure About Something? Take a few pictures and email them to us β we'll tell you exactly how to address the issue.
Repair & Seal
Perform any repair work needed with our Roof Mastic. It's a terrific product β goes on easily with a good flashing brush or trowel. It's thick, almost like a paste, and does a great job fixing, sealing, and patching everything on your roof.
Metal Roofs
- Coat all bolt/screw heads and lap joints with Armor Roof Patch Mastic
- Let dry 24β48 hours
- If seams are tight and screws are new and tight, mastic is not required on seams β but it's always a good idea
- Apply mastic around the curbs of all roof penetrations (vent pipes, exhaust fans, HVAC equipment)
Concrete Roofs
- Apply a thin coat of Roof Mastic on each joint
- Embed roofing mesh into the mastic
- Apply a second coat to fully cover the mesh β this creates a reinforced expansion joint
- Let dry overnight (no longer than 48 hours)
Also for Metal Roofs: Any seams or joints that have bulged or split open should get the same mesh treatment as concrete joints. Doing these preparation steps will ensure a 100% watertight installation.
Mix & Apply the First Coat
Mix the coating with a heavy-duty mixer in a 1/2" drill. Apply with a 9" or 18" roller, spray gun, or even a brush on smaller roofs, hard-to-reach places, or roof edges where overspray is not wanted.
Brush application works great for edges and areas where overspray is not wanted
Spray Application (Large Roofs)
For spray applications on large roofs, use a commercial sprayer with the following specs:
- 3,000 psi with 0.75β1 GPM minimum
- Tip size: .027β.031
- Hoses: 3/8" ID (use 1/2" ID for hose lengths over 60')
- Recommended models: Graco Ultra Max 695, Graco Ultra Max 795, Graco GMax 3400, or similar
Spray application recommended for roofs 10,000 sq ft and larger
Coverage Tip: Maintain the 100 sq ft per gallon spread rate. An easy way to ensure proper coverage is to mark out 500 sq ft squares or rectangles and use 1 pail per 500 sq ft area. We recommend spraying for roofs 10,000 sq ft and larger β otherwise rolling is just as quick.
Apply the Second Coat
Let the first coat dry for 24 hours, then apply the second coat. Maintain 1 gallon per 100 sq ft for the second coat as well.
That's It β Your Roof Is Protected! Two coats at the proper coverage rate ensures maximum durability and a 100% leak-free finish.
Weather & Application Conditions
- Do not start if temperature will fall below 40Β°F during the curing period
- Do not start if rain is forecast within the curing time frame
- Do not use on EPDM roofs
Questions About Your Roof Project?
Our techs have helped customers install millions of square feet of this product. Whether you're a homeowner doing it yourself or a contractor bidding a job, we're here to help.
Talk to an expert at 866-532-3979 β info@armorgarage.com or Request a Quote for project pricing and volume discounts on large roof jobs.
Coating Features at a Glance
Why Cheap Coatings Fail: There's no magic formula β bargain coatings are cheap because they're mostly water, inferior solvents, or silicone. They stretch out after a few years and stop keeping water out. That's why the Air Force stopped using silicone coating β it didn't last, didn't work, and the "lifetime warranty" was bogus.
See the full comparison: Roof Coating Comparison Chart
Must Read Before You Start
Painted Metal Roofs
We strongly recommend removing any loose or peeling paint and applying one coat of our Bonding Primer to the entire roof surface to ensure 100% bonding between the roof coating and your metal roof.
Rust Spots & Corroded Hardware
- Rust spots: Wire brush to remove as much rust as possible, then prime with a paintable zinc primer
- Corroded bolts or screws: Hit them with paintable zinc primer and apply a dab of our Roof Mastic over them for added protection
- Seams with corrosion: Same treatment β zinc primer plus Roof Mastic
After Coating β Maintenance Free: Once your roof is properly coated, it should be maintenance free for many years. Just keep an eye on screws and joints β this is where most metal roof problems occur. If you've followed our instructions, you should not have this problem.
Ponding Water Coating: Should only be used with Armor Roof Coatings or Bonding Primer as a basecoat. Ponding Water Coating should always be the final coating on the roof.
Warranty & Guarantee
Coating must be applied to entire roof for warranty coverage. There is no guarantee for partial roof coverage. Full 12-year guarantee covers delamination or erosion of the coating during the warranty period.
It is the purchaser's responsibility to repair all roof defects properly (rust, delaminating or damaged seams, flashings, mold, mildew, or badly deteriorated roofing material) prior to application, and to apply product at recommended thickness to a compatible surface during proper weather conditions.
Guarantee Coverage: Coverage for delamination or erosion of the coating during the warranty period. Coating must be applied to the entire roof surface. We have never had an actual product failure, but should you feel the product has failed, notify ArmorGarage by email or fax with a description and nature of failure. On substantiation of a product defect, ArmorGarage will provide sufficient replacement product to repair all affected areas. ArmorGarage is not liable for any labor or consequential damage costs including but not limited to mold or mildew damage, loss of use, or any damage to property.
Exclusions: Damage from failure to follow instructions, natural disasters and acts of God, shifting or swelling of the roofing system or structure, exposure to destructive chemicals, over-accumulation of organic materials or roof debris, failure of previously applied coatings, acts beyond our control, negligence, misuse, cosmetic changes in appearance, and product failure due to ponding water areas lasting longer than 48 hours after last rainfall (use our Ponding Water Roof Coating for these areas).
