Lanco Elastomeric Roof Sealer: A Complete Guide to Elastomeric Roof Coatings
Lanco Elastomeric Roof Sealer is a versatile coating designed to protect and extend the life of roofs by forming a flexible, waterproof barrier. This guide explains what the product is, where it works best, how to apply it, and how it compares to other sealants. It also covers preparation, maintenance, and safety considerations to help homeowners and contractors make informed decisions about elastomeric roof coatings and the role of Lanco in modern roof protection.
What Is Lanco Elastomeric Roof Sealer
Lanco Elastomeric Roof Sealer is an acrylic-based, elastomeric coating formulated to seal and protect roof surfaces. The elastomeric properties allow the film to stretch and recover with roof movement, reducing crack transmission and enhancing waterproofing. It often goes on as a white or light-colored coating that helps reflect solar heat, potentially lowering attic temperatures and cooling energy costs. The product is typically marketed for use on concrete, modified bitumen, and some metal or previous coatings, depending on the variant and preparation.
Key Benefits And Differences From Other Sealants
Elastomeric roof coatings offer several advantages over traditional asphalt or solvent-based sealants. The primary benefits of Lanco Elastomeric Roof Sealer include:
- Durable Waterproofing: Flexible films resist cracking and weathering, forming a continuous waterproof layer.
- Weather Resistance: Excellent performance against UV exposure, rain, wind, and temperature fluctuations typical in many U.S. climates.
- Energy Efficiency: Light colors reflect sunlight, reducing heat absorption and potentially lowering cooling loads.
- Easy Maintenance: Periodic topcoats can extend service life without heavy maintenance.
- Reduced Odor And Low VOC Options: Many elastomeric products, including some Lanco formulations, emphasize low odor and lower volatile organic compounds (VOC) compared to solvent-based coatings.
Compared with acrylic concrete sealers or polyurethane coatings, elastomeric coatings like Lanco provide more elasticity and better bridging of hairline cracks, which is valuable for aging roofs and surface irregularities. However, they may not be suitable for all substrates or climates, and substrate preparation remains critical for adhesion and long-term performance.
Surfaces And Substrates: Where It Works Best
Lanco Elastomeric Roof Sealer typically adheres well to prepared concrete, masonry, spray-applied coatings, and certain metal roofs when the surface is clean and sound. Surfaces facing constant moisture, algae growth, or severe efflorescence require cleaning and treatment before sealing. Some rubbers, asphalt shingles, or heavily rusted metal may need priming or alternative coatings. Always consult the product data sheet to confirm substrate compatibility and any required primers or sealants for your specific roof type.
Preparation And Application: A Step‑By‑Step Overview
Proper preparation is essential to maximize adhesion and durability. A typical application sequence includes:
- Inspect And Repair: Check for structural damage, leaks, and loose flashing. Repair or replace damaged components.
- Clean The Surface: Remove dirt, debris, mildew, and loose coatings. For tough stains, use a mild detergent rinse and allow to dry completely.
- Priming (If Required): Some substrates or older coatings require a primer. Follow the product data sheet for approved primers and cure times.
- Mask And Protect: Cover surrounding elements and create edge lines for neater coverage.
- Mix And Test: Stir thoroughly. Apply a test patch to confirm adhesion and color, especially on porous surfaces.
- Apply Coating: Use a roller, brush, or airless sprayer to apply even coats. For best performance, apply in thin, even layers and avoid puddling.
- Dry And Cure: Allow the first coat to dry per the label, then apply a second coat if specified. Ensure adequate ventilation and temperature control during curing.
Best practices include applying coatings in moderate temps (generally between 50°F and 90°F) with low humidity. Two coats are common for better coverage and longer life, though some roofs may require only one coat if specified by the data sheet.
Maintenance, Lifespan, And Recoating
Elastomeric coatings typically offer multi-year protection, with service life influenced by climate, roof slope, and maintenance. The coating may lose some elasticity or experience chalking in extreme UV exposure over time. When deterioration becomes visible—such as cracking, loss of adhesion, or standing water—recoat with the same or compatible product, ensuring the surface is clean and sound. Regular inspections after storms or severe weather help identify early issues before leaks develop.
Environmental And Safety Considerations
Many elastomeric roof coatings, including Lanco formulations, emphasize low odor and reduced VOC content relative to older solvent-based coatings. Proper ventilation during application is essential, and workers should wear appropriate PPE, including gloves and eye protection. Disposal should follow local regulations for paints and coatings. When in doubt, consult the product data sheet and local environmental guidelines before use.
Cost, Availability, And Replacement For Roof Projects
Costs for elastomeric roof coatings vary by brand, coverage rate, and regional market conditions. Lanco products are commonly available through building supply stores, contractor channels, and online retailers. A typical coverage estimate ranges from 1 to 2 gallons per 100 square feet per coat, depending on porosity and desired thickness. Labor costs for application should reflect surface complexity, surface cleaning needs, and the number of coats. A professionally applied elastomeric roof coating can provide longer life and reduced maintenance costs compared with traditional sealants, especially on aging roofs.
Comparison At A Glance: Elastomeric Sealers Vs. Alternatives
| Feature | Lanco Elastomeric Roof Sealer | Asphalt Sealants | Polyurethane Coatings |
|---|---|---|---|
| Elasticity | High, accommodates movement | Lower | High, but often stiffer |
| UV Resistance | Excellent with reflective options | Moderate | Excellent |
| Waterproofing | Strong, flexible film | ||
| Application Ease | Moderate; may require priming | ||
| Environmental Impact | Low VOC variants available | ||
| Cost | Moderate |
Common Application Mistakes To Avoid
Avoid applying to damaged roofs without repairs, skipping cleaning, or neglecting primer requirements. Over-thick coatings can trap moisture and cause bubbles or delamination. Do not apply if rain is forecast within the cure window, and avoid applying in extreme temperatures or on wet surfaces. Following the manufacturer’s data sheet precisely reduces failures and extends life.
Final Considerations For Homeowners
For those seeking a durable, flexible waterproofing layer, Lanco Elastomeric Roof Sealer offers advantages in elasticity, UV resistance, and potential energy savings. Before purchasing, verify substrate compatibility, expected climate performance, and whether a primer is needed. If the roof is heavily damaged or has persistent leaks, consult a roofing professional to assess the need for repairs or replacement before recoating. When properly applied and maintained, elastomeric coatings can provide reliable protection and longer intervals between major roof projects.