What Is the Best Roof Coating for Shingles?

TLDR;

The best roof coating for shingles is silicone coating due to its superior waterproofing, UV resistance, and long-lasting durability. It's especially ideal for areas with high heat or heavy rainfall and helps extend the life of your asphalt shingle roof while reducing energy bills.

Understanding Roof Coatings for Shingle Roofs

Roof coatings for asphalt shingles act as a protective layer, extending the life of your shingles by shielding them from water, UV rays, and environmental damage.

Yes, you can put roof coating on shingles—contrary to popular myths, certain types are compatible with asphalt shingles, but not all are ideal. Choosing the wrong coating—or applying it over layered shingles without proper prep—can lead to ventilation problems, moisture buildup, and other serious shingle overlay risks, including voiding your roof warranty.

Coatings that work best are those with:

• Low VOCs for eco-friendliness
  
  
• High reflectivity ratings (Solar Reflective Index)
  
  
• Proven compatibility with asphalt-based materials
  
  

At Amish Roofer, we always evaluate compatibility first to ensure performance and longevity.

Types of Roof Coating for Shingles (Pros and Cons)

Let’s break down the top roof coating types and how they compare when used on shingle roofs:

Silicone and elastomeric coatings stand out as the best for asphalt shingle roof preservation.

Best Reflective Coating for Asphalt Shingles

The best reflective coating for asphalt shingles is white silicone roof coating due to its:

• High solar reflectance (SRI above 85)
  
  
• Ability to reduce attic heat by up to 20°F
  
  
• Long-term UV protection for shingle roofs
  
  

It’s also resistant to cracking and ponding water, making it ideal for energy-efficient roof coating projects in both residential and commercial applications.

How to Choose the Best Roof Coating for Asphalt Shingles

When choosing the best roof coating, consider:

• Climate – Use elastomeric or silicone in extreme heat or cold
  
  
• Moisture – Silicone performs best in high humidity/rainfall areas
  
  
• Budget – Acrylic is cost-effective but may require recoating sooner
  
  
• Sustainability – Look for low-VOC and ENERGY STAR–rated options
  
  
• Ease of Application – Some products are DIY-friendly, others require pro help
  
  

At Amish Roofer, we match your home’s needs to the right product to ensure long-term results.

Top 5 Roof Coating Products for Shingles (Reviewed & Rated)

1. GacoRoof Silicone Roof Coating
   
   

• Waterproof, UV resistant, mold-resistant
  
  
• Ideal for humid, rainy climates
  
  
• Price: $$$
  
  
• Warranty: 20 years
  
  

1. Henry Tropi-Cool 100% Silicone
   
   

• Reflects up to 96% of UV rays
  
  
• Energy-efficient and easy to apply
  
  
• Price: $$
  
  
• Warranty: 15 years
  
  

1. Lanco Ultra Siliconizer
   
   

• White reflective roof paint with waterproofing
  
  
• Best for DIY roof coating for shingles
  
  
• Price: $
  
  
• Warranty: 7–10 years
  
  

1. Kool Seal Elastomeric Roof Coating
   
   

• Great for thermal expansion/contraction areas
  
  
• Flexible and durable
  
  
• Price: $$
  
  
• Warranty: 12 years
  
  

1. Rust-Oleum LeakSeal Roof Coating
   
   

• Thick waterproof coating for emergency repairs
  
  
• Best as a patch or temporary fix
  
  
• Price: $
  
  
• Warranty: Varies
  
  

These options balance performance, price, and warranty for different climates and roofing needs.

Step-by-Step Guide to Applying Roof Coating on Shingles

Surface Prep:

• Clean the roof with a pressure washer (low setting)
  
  
• Check for damaged shingles and replace
  
  
• Allow to dry completely before coating
  
  

Tools & Materials:

• Roof coating (silicone/acrylic)
  
  
• Roller or sprayer
  
  
• Safety harness, gloves, and goggles
  
  

Application Process:

• Apply in even strokes using roller or sprayer
  
  
• Avoid coating during rain or high humidity
  
  
• Ideal temperature: 55–85°F
  
  

Drying & Curing Time:

• Acrylic: 4–8 hours to dry, 24–48 hours to cure
  
  
• Silicone: 8–12 hours to dry, 48+ hours to cure
  
  

Avoid walking on it before it fully cures. Some coatings may require two coats.

Roof Maintenance: When to Recoat Shingle Roofs

Signs it’s time to recoat:

• Fading or chalking of the roof surface
  
  
• Loss of waterproofing (visible leaks or stains)
  
  
• Cracks or peeling in the coating
  
  

Maintenance tips:

• Inspect roof annually
  
  
• Recoat every 5–10 years depending on product
  
  
• Remove debris and keep gutters clean
  
  

Consistent maintenance can increase shingle lifespan and avoid costly replacements.

Cost of Roof Coating Shingles

Typical price ranges:

• DIY cost: $0.75–$1.50 per square foot (materials only)
  
  
• Professional cost: $2.00–$4.00 per square foot
  
  

Additional costs may include:

• Roof inspection
  
  
• Repairs prior to coating
  
  
• Special tools or equipment
  
  

Energy savings of 10–30% in cooling costs can offset initial investment over time.

Roof Coating Pros and Cons for Asphalt Shingles

Pros:

• Extends roof life by 10–20 years
  
  
• Reflects heat and reduces energy bills
  
  
• Waterproofs and protects from UV
  
  
• Eco-friendly options available
  
  
• Cost-effective alternative to re-roofing
  
  

Cons:

• Not all coatings are shingle-compatible
  
  
• May void manufacturer’s warranty if not applied properly
  
  
• Silicone coatings can be slippery when wet
  
  
• Application must follow exact guidelines

Expert Tips to Maximize Roof Coating Performance

• Don’t coat over wet or moldy shingles
  
  
• Avoid cheap, non-rated products (check certifications)
  
  
• Use reflective coatings for hot regions
  
  
• Always read manufacturer instructions
  
  
• Hire a pro if the slope is steep or surface is damaged
  
  

Scam alert: Avoid miracle coatings that promise lifetime durability—none exist. Warranties are realistic when applied and maintained properly.

What’s the Best Roof Coating for Shingles?

• For hot, sunny climates: White silicone or cool roof coatings
  
  
• For rainy regions: Silicone for waterproofing and mildew resistance
  
  
• For tight budgets: Acrylic with periodic reapplication
  
  
• For eco-conscious homeowners: Low-VOC elastomeric options
  

FAQ – Roof Coating for Shingles

Can you use elastomeric coating on shingles?e.

Yes, if it’s designed for asphalt shingles. It offers flexibility for temperature changes.

How long does roof coating last on shingles?

Anywhere from 5 to 20 years depending on the type and climate.

Will coating void my shingle warranty?

It can. Check with the manufacturer or have a pro apply a certified coating.

Is it safe to walk on a coated roof?

Once fully cured, yes—but silicone can be slippery, so use caution.

Does roof coating lower cooling bills?

Yes, reflective coatings can reduce cooling costs by 10–30%.