3 Dangerous Myths About Silicone Coatings on Metal Roofs (And How to Avoid Them)

Silicone roof coatings are a popular choice for commercial metal roofs—especially in areas with intense sun and unpredictable weather like Los Angeles. But with popularity comes misinformation.

In this article, we’ll bust three common myths about silicone coatings on metal roofs and give you the facts you need to make a smart roofing decision.

1. Myth: Silicone Coatings Don’t Stick to Metal Roofs

The Truth:
Silicone coatings actually adhere very well to metal—but only if the surface is properly prepared.

That means:

  • Power washing to remove dirt and rust

  • Applying primer on rusty or oxidized surfaces

  • Making sure the surface is dry and clean before application

When applied correctly, silicone can form a watertight, UV-resistant barrier that lasts for years.

🛠️ Check out our guide on Metal Roofs.

2. Myth: Silicone Will Stop All Leaks Instantly

The Truth:


While silicone is known for its waterproof properties, it won’t solve structural issues or active leaks without roof prep and repair.

Before applying any coating, you should:

  • Seal seams

  • Replace missing fasteners

  • Repair flashing

  • Address any ponding water issues

Skipping these steps means your coating won’t last—and might not even work.

👉 Need help assessing your roof first? Schedule a free inspection with our team.

3. Myth: One Thick Coat Is Enough

The Truth:


A thicker coat doesn’t mean better protection. In fact, it can cause curing problems and shorten the life of the coating.

Most manufacturers recommend:

  • Two thin, even coats

  • Targeting 20–30 mils dry film thickness

  • Following precise recoat timing

Always follow the product guidelines or hire a certified contractor to apply it for you.

🧪 Learn more about why proper application matters with silicone coatings.

Conclusion:

Silicone coatings are a great option for extending the life of your commercial metal roof—but only when installed the right way. Don’t fall for these myths and end up with a costly mistake.

For expert service, high-quality materials, and over 30 years of experience in Orange County and Los Angeles, contact Central Roofing Company today.

📞 Call us at 310-527-6770 or visit centralroof.com