Lanco Elastomeric Roof Sealer is a flexible, durable coating designed to protect and extend the life of flat and low-slope roofs. This guide explains what it is, where it works best, how to apply it, and how it compares with other roof sealants. For homeowners, contractors, and property managers, understanding its features, application steps, and maintenance considerations helps ensure a reliable, long-lasting seal against moisture, UV damage, and aging roofing materials.
What Is Lanco Elastomeric Roof Sealer
Lanco Elastomeric Roof Sealer is a high-build coating formulated from elastomeric polymers that create a seamless, stretchable layer over roof substrates. It forms a flexible film capable of withstanding thermal movement without cracking. The product is generally water-based, low-odor, and designed for both new and existing roofs. It often serves as a protective topcoat after primer application on concrete, plywood, metal, or modified bitumen surfaces.
Key Features And Benefits
- Elasticity And Flexibility: The elastomeric film stretches with roof movement, reducing crack propagation and water intrusion.
- Water Resistance: Creates a barrier that resists rain and moisture, helping to prevent leaks on flat and low-slope roofs.
- UV Protection: Reflective or light-colored formulations help reduce heat absorption and cooling costs in hot climates.
- Easy Maintenance: Recoat intervals are manageable with proper surface preparation and cleaning.
- Compatibility: Designed to adhere to common roofing substrates such as concrete, wood, metal, and asphalt-based systems.
- Low Odor And VOCs: Safer to apply in occupied spaces or projects with ventilation constraints.
Applications And Substrate Compatibility
Lanco Elastomeric Roof Sealer is suitable for a range of flat and low-slope roof types, including
- Concrete and masonry roofs
- Asphalt or modified bitumen membranes
- Metal panels and metal flashings
- Wood decks and plywood substrates
- Previously painted or primed roofs with appropriate adhesion properties
Before application, it is essential to verify surface readiness, including cleaning, removing loose materials, and addressing any ponding water issues. In some cases, a compatible primer is recommended to improve adhesion on smoother substrates or highly porous surfaces.
Preparation And Application Process
Proper preparation yields the best performance from Lanco Elastomeric Roof Sealer. The typical process includes:
- Weather Window: Apply in dry conditions with temperatures within the product’s specified range, avoiding extreme heat or cold.
- Surface Cleaning: Remove debris, algae, oils, and loose coatings. For stubborn contaminants, use a mild detergent solution and a power washer if allowed by the substrate.
- Repairs: Seal active leaks and repair severely damaged areas with compatible patches or mesh reinforcement as needed.
- Priming: Apply a compatible primer on smooth or highly porous surfaces if recommended by the manufacturer.
- Mixing And Application: Stir to a uniform consistency. Apply with a brush, roller, or airless spray according to manufacturer guidance. Apply a uniform first coat and allow to dry before applying a second coat for desired thickness and performance.
- Coating Thickness: Follow the recommended dry film thickness (DFT) to balance waterproofing and elasticity. Over-thick coats may cure unevenly, while under-thick coats may offer reduced protection.
Recoat intervals depend on weather, roof movement, and wear. Inspections after seasonal cycles help determine when a refresh is necessary to maintain long-term performance.
Maintenance, Longevity, And Limitations
Proper maintenance can extend the life of an elastomeric roof coating, while neglect can lead to premature failure. Key considerations include:
- Inspection Schedule: Conduct annual roof inspections to identify cracking, blistering, or dirt buildup that could compromise the seal.
- Cleaning: Remove debris and dirt to maintain surface reflectivity and adhesion. Avoid harsh brushes that could abrade the coating.
- Recoat Timing: Plan recoats when the current layer shows significant weathering or after years of UV exposure, as recommended by the product data sheet.
- Temperature And Humidity: High humidity or cold temperatures can affect curing and film formation; follow manufacturer guidelines for optimal conditions.
- Patch Compatibility: When repairing areas, ensure that patches or second coatings are compatible with the base elastomeric layer to prevent delamination.
Limitations to consider include potential incompatibility with certain solvent-based coatings, heavy ponding conditions, or substrates with persistent moisture. In those cases, surface modification or alternative roof systems might be necessary.
Cost, Coverage, And Return On Investment
Estimating cost involves material price per gallon, surface area, and the number of coats required. Lanco Elastomeric Roof Sealer typically covers a wide area per gallon, but coverage varies with porosity and texture of the roof. Factors influencing ROI include:
- Energy Savings: Reflective coatings can reduce cooling loads on commercial and residential roofs, offsetting material costs over time.
- Extended Roof Life: Elastomeric coatings mitigate thermal cycling and moisture ingress, delaying expensive roof replacement.
- Maintenance Costs: Regular coatings can reduce leaks and insurance claims, contributing to overall savings.
For accurate budgeting, obtain several quotes that include surface prep, primer (if required), two coats, and clean-up. Ensure the scope matches the manufacturer’s recommended procedures to avoid warranty issues.
Comparison With Other Elastomeric And Traditional Roof Coatings
When evaluating Lanco Elastomeric Roof Sealer, compare it against other common options such as acrylic elastomeric coatings, silicone sealants, and asphalt-based coatings. Consider these factors:
- Elasticity: Elastomeric formulations generally outperform single-component acrylics in long-term flexibility.
- Reflectivity: Light-colored or reflective versions reduce heat absorption, influencing energy efficiency.
- Water Resistance: Silicone forms may excel in pure waterproofing, but require proper surface preparation and may not adhere to all substrates as effectively as elastomeric coatings.
- Maintenance: Acrylics can chalk over time; elastomerics resist UV degradation better on many roofing surfaces.
Choosing the right product depends on roof type, climate, substrate, and performance goals. For many flat and low-slope roofs, Lanco Elastomeric Roof Sealer offers a balanced combination of adhesion, elasticity, and ease of application.
Common FAQs And Best Practices
- Q: Can Lanco Elastomeric Roof Sealer be applied over existing coatings?
- A: Yes, but surface compatibility and adhesion must be evaluated; some coatings require priming or mechanical abrasion for proper bonding.
- Q: How long does curing take?
- A: Typically 4–8 hours for a dry-to-touch film under recommended conditions; full cure may take longer depending on humidity and temperature.
- Q: Is it safe for occupied buildings?
- A: Many formulations are low-odor and low-VOC, but always verify product data sheets for occupant safety guidelines and ventilation needs.
- Q: Can it be used on metal roofs?
- A: Yes, with proper preparation and potential primer on highly reflective metal surfaces to ensure adhesion and longevity.
Where To Source And How To Verify Authenticity
Purchase Lanco Elastomeric Roof Sealer from authorized distributors, roofing suppliers, or the manufacturer’s official channels. Verify product codes, batch numbers, and warranty terms. Keep purchase records for warranty claims and ensure you receive the correct formulation for your climate and substrate. Reading the technical data sheet (TDS) and safety data sheet (SDS) provides critical guidance on mixing, application, and hazard considerations.
Final Recommendations For Homeowners And Pros
For best results, select the elastomeric roof sealer that matches the roof type, climate, and performance goals. Prioritize proper surface preparation, adhere to recommended coating thickness, and schedule follow-up inspections to verify performance over time. When used correctly, Lanco Elastomeric Roof Sealer can deliver effective waterproofing, energy efficiency benefits, and an extended roof life for a wide range of U.S. roofing applications.