Arizona’s brutal heat, monsoon rains, and intense UV take a heavy toll on asphalt shingles. Surface temperatures regularly hit 140°F+, granules wash away, and micro-cracks turn into leaks. The right sealant acts as a flexible shield that prevents water intrusion, locks granules in place, and can add years to your roof’s life.
In-Ex Designs Roofing has protected shingle roofs across Phoenix, Scottsdale, Maricopa, Chandler, Gilbert, Peoria, and the White Mountains for over 25 years. Below you’ll find the sealants that actually perform in our climate, when to use each type, and exactly how our team applies them for lasting results.
Last updated: July 2026 Written by the In-Ex Designs Roofing team – 25+ years of Arizona roofing experience.
Why Seal Asphalt Shingles?
Asphalt shingles are affordable and popular across the Valley, but they are not maintenance-free in Arizona. UV radiation breaks down the asphalt binder, daily temperature swings of 40°F+ cause expansion and contraction, and monsoon winds drive rain under lifted tabs.
Proper sealing:
- Fills micro-cracks and seals shingle tabs
- Reinforces seams around vents, chimneys, and flashings
- Reduces granule loss
- Helps maintain insurance eligibility (documented maintenance is often required)
- Delays costly full replacements
In high-exposure areas such as Maricopa (heavy monsoon rain) or Peoria/Surprise (wind uplift), sealing is one of the highest-ROI maintenance steps you can take.
Top Sealants for Asphalt Shingles
Here’s how the three main categories perform in Arizona conditions. We rank them based on real-world performance on Valley roofs, adhesion to granule surfaces, flexibility under extreme heat, and longevity.
| Rank | Type | Best For | Top Brands We Use / Recommend | Key Strengths in Arizona | Main Limitation | Typical Lifespan |
|---|---|---|---|---|---|---|
| 1 | Silicone | Older roofs, monsoon zones, maximum waterproofing | GE Silicone II, DAP Dynaflex Ultra | Excellent flexibility through 40°F daily swings, superior water resistance, UV stable | Higher cost, harder to paint | 8–15 years |
| 2 | Polyurethane | High-wind areas, strong adhesion needs | Loctite PL, Sikaflex | Outstanding adhesion to asphalt, handles wind uplift well | Longer cure time (24–48 hrs) | 7–12 years |
| 3 | Acrylic | Newer roofs, budget-conscious, milder micro-climates | Quality acrylic elastomeric formulas | Easy application, quick dry, affordable | Less flexible in extreme heat, may chalk or crack sooner | 3–7 years |
Polyurethane Sealants Extremely durable with excellent adhesion. Our go-to when wind uplift is a concern (Peoria, Surprise, Chandler, Glendale). Tough and versatile for cracks and seams that see movement.
Acrylic Sealants Budget-friendly and easy to apply. Suitable for newer roofs with minimal damage in milder spots such as Ahwatukee or Tempe. Not our first choice for high-UV or high-wind exposures because they are less flexible long-term.
Choosing the Right Sealant for Your Roof
The best sealant depends on four factors:
- Roof Condition: Older roofs with cracks or granule loss need silicone for its waterproofing; newer roofs may suffice with acrylic. In-Ex Designs’ free inspections pinpoint the best choice.
- Climate: Maricopa’s heavy rains favor silicone’s water resistance, while Peoria’s winds call for polyurethane’s strength. The Insurance Institute for Business & Home Safety recommends sealants for storm-prone regions.
- Compatibility: Silicone and polyurethane sealants are ideal for asphalt shingles due to their flexibility and adhesion. Ensure your underlayment is in good condition for optimal results.
- Budget: Acrylic is the cheapest, but silicone offers better long-term value. In-Ex Designs offers financing, like 12 months same-as-cash, to make premium sealants affordable.
How In-Ex Designs Applies Sealants
We follow a proven five-step process on every job:
- Inspection – We check for cracks, granule loss, lifted tabs, and seam damage.
- Cleaning – Remove dirt, algae, debris, and loose granules so the sealant can bond properly.
- Preparation – Prime seams and flashings where needed for maximum adhesion.
- Application – Apply with caulk guns or brushes, focusing on vulnerable areas and ensuring uniform coverage.
- Final Check – Inspect for complete coverage and durability before we leave.
A Chandler homeowner recently told us: “After In-Ex Designs applied silicone sealant, my roof survived last summer’s monsoons without a single leak. Their team was professional and fast.”
Benefits of Sealing Asphalt Shingles
- Stops water from seeping into the home
- Reduces UV-driven fading and cracking
- Delays full roof replacement (often by several years)
- Strengthens insurance claims for storm damage when maintenance is documented
- Protects interiors in Scottsdale, Phoenix, Gilbert, and beyond
FAQs About Roof Sealants for Asphalt Shingles
How often should I seal my asphalt shingle roof in Arizona? Every 3–5 years is typical, depending on UV exposure, roof age, and storm frequency. High-exposure roofs (south-facing, older shingles) may need attention closer to the 3-year mark.
Do sealants help with energy savings? Yes. By preventing leaks and maintaining the integrity of the shingle system, they help preserve insulation performance and can reduce cooling costs.
Can I apply roof sealant myself? Technically yes, but DIY results in Arizona often fail. Uneven coverage, missed spots around flashings, and improper surface prep are common. Our professional application is warranted and designed for our climate.
Are all sealants compatible with asphalt shingles? Most quality silicone and polyurethane products are. Generic latex or non-roofing caulk is not. We confirm compatibility during the free inspection.
What’s the difference between a sealant and a full roof coating? Sealants target specific cracks, seams, and vulnerable points. Full elastomeric or silicone coatings cover the entire surface. Many roofs benefit from both. We can advise which combination is right for you.
Will sealing void my shingle warranty? When done correctly with compatible products, it generally does not. We use manufacturer-approved materials and document the work.
Protect Your Roof with In-Ex Designs
In-Ex Designs proudly serves homeowners across Phoenix, Scottsdale, Maricopa, Chandler, Gilbert, Glendale, Peoria, Surprise, Ahwatukee, and the White Mountains. We are committed to extending the life of your roof with expert care and high-quality materials.
Call (602) 938-7575 or visit inexroofing.com for a FREE inspection and personalized quote today.
