Henry Smooth Black Asphalt All-Weather Roof Cement, 3.3 gal, is built for long-lasting protection of asphalt roofs in any season. This cold-applied, fiber-reinforced sealant creates a seamless, flexible barrier that stops leaks at seams, around flashing, vents, and other roof penetrations.
Why this matters: The cement is designed for durability, resisting cracking as temperatures swing from cold snaps to scorching sun. Its 7-year durability rating means fewer re-patches and less call-back work, making it ideal for homeowners and professional crews alike.
Key features:
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Cold-applied, easy to use—no heating needed; apply with a trowel or putty knife directly from the can.
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Fiber-reinforced formulation—adds tear resistance and helps the seal stay intact on aging roofs.
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All-weather performance—designed to seal out wind-driven rain and resist shrinking in temperature swings.
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Dark black color blends with typical roofing materials for a clean, professional finish.
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Durability up to 7 years—long-lasting protection that reduces maintenance intervals.
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Not water-based—offers strong, water-resistant adhesion on asphalt surfaces.
Who it's for: This product is ideal for DIY homeowners tackling roof leaks, as well as roofing professionals and property managers who need a reliable, weather-resistant patch kit for asphalt-based roofs, including seams, flashing, valleys, and around penetrations such as vent pipes and chimneys.
How to use (quick guide):
- Prepare the surface: remove loose material and clean the area around the leak, ensuring it is dry before application.
- Apply a generous bead or patch over the leak area with a putty knife or trowel, building up a firm, continuous seal.
- Press and smooth to ensure full contact with the substrate, then allow the cement to cure in the ambient conditions.
Storage and tips: Store Henry Smooth Black Asphalt All-Weather Roof Cement in a cool, dry place with the lid tightly closed to preserve tackiness and extend shelf life. For best results, re-check patched areas after heavy rain or seasonal transitions and reapply only where needed.
