Gardner Aluma-Kote Gloss Silver Fibered Aluminum Roof Coating 5 gal

Our review of the Gardner Aluma-Kote Gloss Silver Fibered Aluminum Roof Coating finds it best suited for building owners and tradespeople who need an economical, reflective coating to renew worn metal roofs. The single biggest reason to buy is its combination of water resistance and reflective aluminum finish that helps stop rust and shed moisture on metal surfaces. This reviewer found it straightforward to apply across a roof surface and appreciated that it seals hairline cracks and pinholes while offering more than 50% solar reflectance per ASTM D2824.

Key Features

• Water-resistant finish: Dries to a protective aluminum-colored layer that helps repel water and reduce moisture penetration on roof surfaces.
• Rust protection: The coating forms a barrier that helps stop rust from progressing on metal roofs when applied correctly to prepared surfaces.
• Seals small defects: The fibered formula helps seal hairline cracks and pinholes to reduce leaks and slow further deterioration.
• Reflective performance: Greater than 50% solar reflectance per ASTM D2824 reduces heat absorption and helps roofs reflect sunlight.
• Economy formula: The product is presented as an economy fibered aluminum roof coating that renews worn surfaces at a lower cost than premium systems.
• Simple cleanup: Water cleanup makes tools and spills easier to deal with after application.

Who It's For

This coating is best for commercial and residential property owners, roof maintenance crews, and contractors who need an affordable, reflective coating for metal or built-up roofs that are weathered but not structurally failed. It is a practical choice for extending the life of a sound roof and improving reflectivity to reduce heat gain.

It is not the ideal option for roofs with large structural damage, active leaks through seams, or where a high-build elastomeric membrane is required; customers with those needs should consider heavier-duty restoration systems or professional reroofing solutions.

Pros & Cons

Pros

• Provides a water-resistant, aluminum-colored finish that helps repel moisture on metal roofs.
• Helps stop rust progression by forming a protective coating over worn metal.
• Seals hairline cracks and pinholes, reducing small sources of leakage when properly applied.
• Reflective formula with >50% solar reflectance improves sun reflection and can lower surface temperature.

Cons

• As an economy, fibered coating it may require periodic reapplication compared with higher-end systems.
• Not intended to replace full roof replacement where structural damage or heavy leaks exist.

Specifications

Product	Aluma-Kote Fibered Aluminum Roof Coating
Brand	Gardner-Gibson
Volume	5 gal (4.75G nominal)
Composition	Asphalt, sand, aluminum, bentonite, water
Reflectance	>50% solar reflectance per ASTM D2824
Type	Type III fibered aluminum coating
Cleanup	Water cleanup

Our Verdict

The Gardner Aluma-Kote is a solid, budget-friendly choice for maintaining and renewing sound metal and built-up roofs. It combines water resistance, rust prevention, and reflective performance in a simple fibered formula, making it good value for property owners and contractors who need practical roof refreshment without investing in higher-cost systems.

Frequently Asked Questions

Is this suitable for metal roofs?
Yes. The coating is formulated to protect and stop rust on metal roofs and to seal hairline cracks and pinholes.

How often should it be reapplied?
Periodic application is recommended to maintain protection, with frequency depending on exposure and roof condition.

Can tools be cleaned with water?
Yes. The product offers water cleanup for tools and minor spills.