Roofers Choice 15 Plastic Roof Cement is a versatile sealant designed for quick, durable repairs on asphalt shingles, metal flashings, vent pipes, and minor roof leaks. This product blends pliable polymer-based compounds with cementitious binders to create a weatherproof seal that remains flexible in changing temperatures. Its user-friendly formulation makes it a popular choice for DIY homeowners and professional contractors alike, offering reliable performance in small-scale repairs and emergency fixes. The article outlines how Roofers Choice 15 works, where it excels, and how to apply it effectively for lasting results.
What Is Roofers Choice 15 Plastic Roof Cement
Roofers Choice 15 Plastic Roof Cement is a polymer-modified cement patching compound engineered for roofing repairs. It combines cementitious material with plasticizers to achieve adhesion, flexibility, and resistance to water intrusion. The product typically comes in a ready-to-use paste that can be spread with a trowel or putty knife, enabling quick sealing of gaps, blisters, and minor cracks. Its formulation is designed to expand with minor substrate movement without cracking, which helps protect underlying materials from moisture infiltration.
Key Uses and Applications
The primary applications of Roofers Choice 15 include sealing leaks around flashing, chimneys, vents, and skylines; patching small holes or cracks in asphalt shingles; and repairing loose or buckled shingles where replacement is not immediately feasible. It can also be used to secure loose seams and to rebuild compacted or weathered edges on roof penetrations. While effective for minor repairs, it is not a substitute for large-scale roofing work, extensive water damage, or structural repairs.
- Shingle Sealing: Fast-drying seal around roof penetrations to prevent water entry.
- Flashing and Vent Areas: Seals gaps where flashing meets roofing material.
- Minor Patch Jobs: Fills small punctures or worn areas on asphalt roofs.
- Temporary Repairs: Offers a temporary fix in preparation for more permanent remediation.
Benefits and Limitations
Benefits include quick curing times, good adhesion to common roofing substrates, and a flexible finish that accommodates thermal movement. The material stays pliable, allowing for minor substrate shifts without losing seal integrity. It also offers water resistance once cured and can be painted over to match surrounding surfaces in some formulations.
Limitations involve reduced effectiveness on heavy moisture exposure during application, slower cures in extreme cold, and diminished performance on expansive or structurally compromised areas. It is not a suitable replacement for roof decking, underlayment, or large-scale roof repairs. Users should avoid applying in temperatures below recommended ranges or on saturated surfaces to prevent poor bonding.
Preparation and Surface Readiness
Proper preparation is crucial for optimal performance. Clean the repair area to remove dirt, dust, loose granules, and old sealant. Dry the surface if possible, as moisture can hinder adhesion. For best results, roughen glossy surfaces slightly with a wire brush or sandpaper to create a better key for the cement. Remove any loose shingle tabs and ensure that the substrate is structurally sound before applying the product. Use masking tape to protect adjacent areas if a neat finish is desired.
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Application Instructions
Apply Roofers Choice 15 with a durable putty knife or trowel. Scoop a small amount, then press firmly into the repair area to form a continuous seal. For larger gaps, apply in layers, allowing each layer to cure per the manufacturer’s guidance before adding the next. Tool the surface to ensure a smooth, even finish that adheres well to the substrate. Avoid overworking the product, which can trap air and create voids. If smoothing over shingles, align the cement to the shingle edges so it bonds with the surrounding material rather than creating a raised ridge.
The product typically cures to a water-resistant seal within a few hours under favorable conditions, but full cure may take longer in cold or damp environments. Read the label for specific cure times and temperature ranges. For best results, schedule repairs during moderate weather and avoid applying when rain is expected within 24 hours.
Drying Time, Temperature, and Curing
Drying times vary with temperature and humidity. In warm, dry conditions, a touch-dry surface may form within 1–2 hours, with full cure occurring over 24–48 hours. In cooler or more humid environments, cure times can extend to 72 hours or more. The product gains optimal strength as it cures, but temperature extremes can affect final performance. Store and apply within the temperature range specified by the manufacturer to maximize bond and flexibility.
Safety and Storage
Wear appropriate protective gear, including gloves and eye protection, to avoid skin and eye contact. Work in a well-ventilated area to minimize inhalation of fumes. Keep containers sealed when not in use and store in a cool, dry place away from direct sunlight and heat sources. Dispose of any unused product according to local regulations, and never mix with incompatible materials. If skin contact occurs, wash with soap and water and seek medical advice if irritation persists.
Compatibility and Performance Considerations
Roofers Choice 15 adheres well to common roofing substrates such as asphalt shingles, metal flashing, and plywood or oriented strand board (OSB) underlayment. It forms a flexible, waterproof seal that remains resilient under normal thermal cycling experienced on US roofs. Performance can vary with substrate cleanliness, presence of moisture, and surface porosity. Always follow the manufacturer’s recommendations regarding substrate compatibility and environmental conditions for application.
Maintenance and Longevity
For minor repairs, the cement is designed to maintain a waterproof seal for an extended period, provided the underlying roof structure remains sound. Periodic inspections are recommended to check for re-emergent leaks around repaired areas, especially after severe weather. If the cement shows cracking or lifting, reapplication or additional sealing may be necessary to maintain integrity. In some cases, combining with complementary roofing sealants or flashing repair kits can enhance overall performance.
Comparisons and Alternatives
When choosing a sealant, homeowners may compare Roofers Choice 15 with other plastic roof cements, acrylic roof sealants, or asphalt-based mastics. Roofers Choice 15 offers a balance of pliability and adhesion that suits minor, quick repairs. For larger leaks or structural concerns, more robust solutions such as professional-grade mastics, roof patch compounds, or flashing replacement may be required. Always evaluate the leak’s source, roof age, and environmental exposure before selecting a product.
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Tips for Best Results
- Clean and dry the area before application to maximize adhesion.
- Apply in moderate temperatures and avoid wet surfaces.
- Work in shallow layers; multiple thin applications yield a stronger seal than a single thick layer.
- Protect surrounding surfaces with tape or masking if a neat finish is desired.
- Follow cure times strictly and avoid foot traffic on patched areas until cured.
By adhering to preparation guidelines, application best practices, and post-repair inspection, Roofers Choice 15 Plastic Roof Cement can provide reliable, weather-resistant seals for many common roofing issues in American homes.