choosing the right sealer for my roof

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We are The Weather Proofing Experts and we’re here to help with the most common (and not so common) questions, resources and know-hows about roof sealers, paints, construction materials, and more. In this post we want to talk about: How to Choose the Right Roof Sealer for Your Roof Type

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Protecting your roof with the right sealer can extend its lifespan, improve energy efficiency, and prevent costly repairs. However, not all sealers work on every type of roof. This guide will help you choose the best roof coating for your needs.

Step 1: Understanding the Different Types of Roof Sealers

Roof sealers come in various chemistries, each offering unique benefits:

• Silicone-Based Sealers – Best for roofs exposed to ponding water, offering superior waterproofing and longevity.

• Acrylic Sealers – Cost-effective, highly reflective, and great for low slope roofs that drain well.

• Urethane Sealers – Excellent for impact resistance, making them ideal for high-traffic roofs.

  
  

Step 2: Identifying Your Roofing Substrate

It is important to state that some roof types require primer. Before choosing a sealer, determine your roof type:

• Asphalt-Based Roofs (SBS, APP, Built-Up Roofing) – Some sealers require a primer for adhesion and to block oil from staining the roof sealer.

• Concrete Tile & Concrete Roofs – Highly compatible with most coatings, but some may need extra reinforcement.

• Metal Roofs – Require flexible coatings that expand with temperature fluctuations; often need a primer.

• EPDM Rubber, TPO, PVC, and Spray Foam – Premium roof sealers or primers are needed for proper adhesion and long-term performance.

By identifying your roofing substrate, you can avoid compatibility issues and ensure long-lasting protection.

Step 3: Determining the Problem on Your Roof

Assess your roof’s condition to find the right sealer for your needs:

• Ponding Water? Choose a 100% silicone sealer like Siliconizer 1000 for superior water resistance. Whenever possible, use Ultra Level to create positive drainage.

• Heat Reflection? Opt for an acrylic sealer like CoolGuard to reduce cooling costs.

• Fast-Drying Needed? Siliconizer 1000 is rain-safe in just 15 minutes.

• Leaks or Aging Roof? A premium and durable sealer like Urethanizer or Ultra Siliconizer helps prevent further damage as part of a repair system that may include Siliconizer Crack Filler, Siliconizer SL, and/or Aqua-Proof Primer.

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Step 4: Choosing the Sealer That’s Right for You

Once you’ve identified your roof type and problem areas, it’s time to pick the best sealer. Here’s a comparison of Lanco’s top roof coatings:

Product	Best For	Warranty	Key Benefits
Siliconizer 1000	Ponding water resistance	Lifetime	One coat application, rain-safe in 15 minutes, Miami-Dade County approved
CoolGuard	Energy savings	25 years	Thermaflex Technology, Miami-Dade County approved
Urethanizer	Longevity	20 years	Highly durable, fiber reinforced, adheres to various roof types, Miami-Dade County approved
Ultra Siliconizer	Workhorse, all-purpose product	15 years	Highly water resistant, silicone-modified, Miami-Dade County approved
White Seal-Plus	Budget-friendly protection	12 years	Applies blue turns white for friendly application, good adhesion, fiber reinforced
White Seal	General roof sealing	10 years	Cost-effective, reliable waterproofing
Siliconizer	Basic waterproofing	5 years	Entry-level protection

Final Recommendation

No matter which product you choose, proper surface preparation is the most important step to ensure long-lasting protection for your roof. For maximum durability and resistance to ponding water, Siliconizer 1000 is your go-to solution.  If energy efficiency is a priority, CoolGuard helps reflect heat and lower cooling costs. Looking for a budget-friendly yet effective option? White Seal-Plus delivers reliable protection across a wide range of surfaces. Always start with a clean, and properly prepared surface, because great results begin at the base.

Still unsure which product is right for your roof? Contact Lanco for expert guidance and ensure long-lasting roof protection!