## [seo] Meta & structured data

- [meta-title] CovaSeal 20 cool roof waterproofing: up to 10°C cooler indoors, 20 years | Covalba
- [meta-description] CovaSeal 20, Covalba's 2-in-1 cool roof waterproofing coating. Reflective liquid waterproofing, up to 10°C cooler indoors, 20-year warranty.
- [schema-product-name] CovaSeal 20 cool roof waterproofing coating
- [schema-product-description] Elastomeric acrylic liquid cool roof waterproofing coating with anti-UV Top Coat, SRI 107, 20-year warranty, manufactured by Covalba.
- [schema-product-category] Cool roof waterproofing coating
- [breadcrumb-home] Home
- [breadcrumb-solutions] Our solutions
- [breadcrumb-product] CovaSeal 20

## [hero] Product hero

- [breadcrumb-label] Our solutions
- [tag] Professional cool roof waterproofing coating
- [product-name] CovaSeal 20
- [tagline] The 2-in-1 liquid cool roof waterproofing coating.
- [description] Elastomeric acrylic resin with anti-UV Top Coat, by Covalba. A single application restores your roof's waterproofing and delivers up to 10°C cooler indoors, with a 20-year warranty.
- [hero-image-alt] Roller application of the CovaSeal 20 cool roof waterproofing coating on an industrial roof
- [primary-cta] Request a quote
- [secondary-cta] Download the technical data sheet
- [badge-1] SRI 107
- [badge-2] 20-year warranty
- [badge-3] Available to order
- [stat-1-value] -8 to -10°C
- [stat-1-label] Indoor temperature
- [stat-2-value] 20 years
- [stat-2-label] of waterproofing + cool roof
- [stat-3-value] 2-in-1
- [stat-3-label] Waterproofing + cool roof

## [showcase] Product positioning

- [eyebrow] Positioning
- [heading-line-1] CovaSeal 20,
- [heading-line-2] the liquid cool roof waterproofing coating.
- [card-eyebrow] The liquid cool roof waterproofing coating
- [card-product-name] CovaSeal 20
- [card-body] A 2-coat system combining the thermal performance of a cool roof coating with the protection of an elastomeric acrylic polyurethane waterproofing layer in a single application. Designed for roofs with micro-cracks, blistering, or minor infiltration. Fills cracks up to 2 mm, protects, and cools without a full overhaul.
- [layer-1] Base Coat — liquid cool roof waterproofing coating (2 to 3 kg/m²).
- [layer-2] Top Coat — high-durability anti-soiling finish.
- [card-cta] Request a quote
- [footer-note] Unsure between CovaSeal and CovaTherm? Our experts will guide you to the right solution.
- [footer-note-link] Talk to an expert

## [compatibility] Compatible substrates

- [heading-line-1] The substrates compatible
- [heading-line-2] with CovaSeal 20.
- [coverage-note] A cool roof waterproofing coating only delivers on its promise if it bonds durably to the substrate.
- [roof-1-type] Bituminous waterproofing
- [roof-1-detail] Aging bituminous membrane, installed more than a year ago.
- [roof-2-type] EPDM membrane
- [roof-2-detail] EPDM rubber membrane over 10 years old, with prior adhesion testing.
- [roof-3-type] PVC membrane
- [roof-3-detail] Synthetic PVC membrane over 10 years old, with prior surface preparation.
- [roof-4-type] Tiles
- [roof-4-detail] Clay or concrete tiles, slightly pitched, in good structural condition.
- [roof-5-type] Slate
- [roof-5-detail] Slate roofs with moderate slope, without major breakage.
- [roof-6-type] Fiber cement
- [roof-6-detail] Compatible porous surface, without exposed fibers, after a technical assessment.

## [specs] Technical specifications

- [eyebrow] Technical specifications
- [heading-line-1] The specifications
- [heading-line-2] of CovaSeal 20.
- [intro] Waterproofing, cool roof reflectivity, durability over two decades. CovaSeal 20 is built for industrial and commercial roofs that demand the best of both worlds without going through a heavy renovation.
- [col-header] CovaSeal 20
- [col-badge] 2-in-1
- [spec-1-label] Technology
- [spec-1-value] Elastomeric acrylic resin + anti-UV Top Coat finish
- [spec-2-label] Substrates
- [spec-2-value] Bitumen > 1 year / EPDM and PVC > 10 years / Tiles, slate, fiber cement
- [spec-3-label] Reflectivity index — SRI (new condition)
- [spec-3-value] 107
- [spec-4-label] Coating system
- [spec-4-value] Base Coat 2 to 3 kg/m² + optional reinforcement fleece + Top Coat
- [spec-5-label] Maintenance coat to plan within
- [spec-5-value] 20 years
- [spec-6-label] Enhanced protection against soiling
- [spec-7-label] Application
- [spec-7-value] By a professional applicator
- [cta] Request a quote
- [footnote] SRI measured per ASTM 1980 standard · 20-year manufacturer warranty · Covalba R&D data

## [certifications] Certifications and compliance

- [eyebrow] Certifications
- [heading-line-1] Certifications and
- [heading-line-2] technical performance.
- [intro] CovaSeal 20 meets the technical and environmental requirements of professional buildings. Broof(t3) fire classification, certified elastomeric resin, low-VOC formulation: every application is backed by a demanding technical framework.
- [cert-1-label] Broof(t3)
- [cert-1-desc] External fire resistance classification, the most demanding level for roof waterproofing.
- [cert-2-label] UV resistance
- [cert-2-desc] Anti-UV Top Coat that stabilizes whiteness and reflectivity over two decades.
- [cert-3-label] Elastomeric resin
- [cert-3-desc] Continuous, flexible, and waterproof film that follows the thermal expansion of the substrate.
- [cert-4-label] Ponding-water resistance
- [cert-4-desc] Formulated to withstand water retention on flat or very low-slope roofs.
- [cert-5-label] 20-year warranty
- [cert-5-desc] Waterproofing and cool roof effect guaranteed over two decades.
- [cert-6-label] Low-VOC formulation
- [cert-6-desc] Compliant with the environmental requirements of high-performance buildings.

## [advantages] Advantages

- [eyebrow] Advantages
- [heading-line-1] The advantages of the CovaSeal 20
- [heading-line-2] cool roof waterproofing coating.
- [intro] Applying CovaSeal 20 to a tired roof delivers a double effect from the very first summer: waterproofing is restored and the indoor temperature drops measurably. Here are the six benefits observed in the field, backed by figures.
- [adv-1-title] Waterproofing restored in a single application
- [adv-1-desc] Fills micro-cracks up to 2 mm and creates a continuous waterproof film, with no dismantling or heavy overhaul. 20-year warranty.
- [adv-2-title] A better working environment
- [adv-2-desc] Up to 8 to 10°C cooler indoors without air conditioning. A warehouse at 40°C drops back to around 30°C.
- [adv-3-title] Lower electricity bill
- [adv-3-desc] Air-conditioning consumption halved in some cases, 15 to 40% savings depending on the activity. Average ROI of 14 months.
- [adv-4-title] An economical alternative to renovation
- [adv-4-desc] €20 to €25/m² versus €80 to €100/m² for a new membrane, and up to €150/m² for an insulation + waterproofing replacement.
- [adv-5-title] Application without interrupting operations
- [adv-5-desc] Spray application from the ground, machines at the foot of the building, hoses alone on the roof. No load, no vibration.
- [adv-6-title] Extends the lifespan of the waterproofing
- [adv-6-desc] Protects against UV and thermal shock, limits expansion-contraction cycles. Pushes back the replacement investment by 8 to 10 years.

## [comparison] Comparison

- [eyebrow] Comparison
- [heading-line-1] Cool roof waterproofing coating or
- [heading-line-2] full overhaul?
- [intro] The choice between CovaSeal 20 and a traditional waterproofing overhaul depends on the condition of the roof, the available budget, and the payback horizon. The criteria that matter are summarized below.
- [col-covaseal] CovaSeal 20
- [col-covaseal-badge] Recommended
- [col-membrane] New membrane
- [col-insulation] Insulation + waterproofing
- [row-1-label] Cost per m²
- [row-1-a] €20 to €25
- [row-1-b] €80 to €100
- [row-1-c] ≈ €150
- [row-2-label] Application time
- [row-2-a] 3 to 5 days
- [row-2-b] 2 to 4 weeks
- [row-2-c] 3 to 6 weeks
- [row-3-label] Cool roof effect
- [row-3-a] up to -10°C
- [row-3-b] Depending on color
- [row-3-c] Depending on insulation
- [row-4-label] Lifespan
- [row-4-a] 20 years
- [row-4-b] 15 to 20 years
- [row-4-c] 20 to 30 years
- [row-5-label] Interruption of operations
- [row-5-a] No
- [row-5-b] Yes
- [row-5-c] Yes
- [row-6-label] Micro-cracks treated
- [row-6-a] up to 2 mm
- [row-6-b] Full overhaul
- [row-6-c] Full overhaul
- [row-7-label] Dismantling existing
- [row-7-a] No
- [row-7-b] Yes
- [row-7-c] Yes
- [row-8-label] Average ROI
- [row-8-a] 14 months
- [row-8-b] 3 to 5 years
- [row-8-c] 8 to 12 years
- [cta] Request a quote
- [footer] CovaSeal 20 is the solution with the fastest payback, with no dismantling or interruption of operations. It stands out as the benchmark for industrial, pharmaceutical, food-processing, aerospace, and commercial buildings whose roof is tired but still usable. For a metal roof such as steel deck, the CovaMetal 20 cool roof coating for steel deck is better suited.

## [faq] FAQ

- [heading] Your questions about CovaSeal 20
- [intro] A question that isn't here? Contact us or request a quote.
- [cta] Request a quote
- [q1] CovaSeal 20 or CovaTherm: how to choose?
- [a1] CovaTherm is a pure cool roof coating, designed for sound roofs that want to gain thermal performance. CovaSeal 20 combines cool roof and liquid waterproofing in the same product. It is applied when the roof has micro-cracks, blistering, or minor infiltration that does not justify a full renovation. A technical assessment makes it possible to choose between the two solutions based on the actual condition of your roof.
- [q2] Can a full waterproofing renovation be avoided?
- [a2] Yes, for roofs that are tired but not yet failing. The system fills micro-cracks up to 2 mm, creates a continuous waterproof film, and extends the lifespan of the existing waterproofing by 8 to 10 years. For a roof with massive infiltration, detached sheets, or an out-of-date waterproofing system, however, a full overhaul remains essential. The on-site assessment makes the decision.
- [q3] Does a roof treated with CovaSeal 20 increase heating consumption in winter?
- [a3] This is the most frequently asked question, and the answer is no. In winter, the sun sits low and is rarely out, so it warms vertical facades far more than the horizontal roof. The lost solar gain on the roof therefore stays minimal, limited to a few hours a day in the shoulder seasons, and is very largely offset by the thermal gain accumulated through the hot months. Over a complete annual energy balance, CovaSeal 20 reduces the building's bill in the vast majority of cases.
- [q4] Does the product hold up where water stagnates?
- [a4] Yes. Where a conventional cool roof coating requires a minimum slope of 3%, the elastomeric acrylic resin of CovaSeal 20 is formulated to withstand water retention and ponding. The product was developed specifically for flat or very low-slope roofs.
- [q5] What is the price of a cool roof waterproofing coating per m²?
- [a5] The price of a professional cool roof waterproofing coating, installed, is between €20 and €25 per square meter, all-inclusive: assessment, substrate preparation, supply, and application. Three factors make the final figure vary: the surface area to be treated (volume discounts beyond 2,000 m²), the condition of the substrate (any spot repairs or reinforcement fleece), and the complexity of the roof (upstands, drains, penetrations).
- [q6] How much product should be planned for 1,000 m²?
- [a6] The complete system consists of a Base Coat dosed at 2 to 3 kg/m², an optional reinforcement fleece on sensitive areas, and an anti-UV Top Coat. For a surface of 1,000 m², plan on between 2 and 3 tons of Base Coat, plus the Top Coat quantities defined in the quote depending on the condition of the substrate.
- [q7] Must CovaSeal 20 be applied by a professional?
- [a7] Yes, for two reasons. First, the quality of the application directly determines the performance of the waterproofing over 20 years: a layer that's too thin, a poorly embedded fleece, or application in humid weather, and the system no longer delivers on its promise. Second, working on a roof requires protective equipment, training, and suitable gear. Covalba recommends having the coating applied by a professional applicator trained on its products, which is a condition of the manufacturer warranty.
- [q8] What maintenance does a cool roof waterproofing coating need?
- [a8] The anti-UV Top Coat of CovaSeal 20 has self-cleaning properties. We recommend an annual inspection and a rinse with water to remove particles and optimize solar reflection. No chemicals are needed.

## [editorial] Editorial feature

- [eyebrow] Feature
- [heading-line-1] Cool roof waterproofing coating,
- [heading-line-2] explained.
- [intro] Cool roof waterproofing coating, roof waterproofing paint, elastomeric resin, reflective liquid coating: several names for the same family of products that combine waterproofing and solar reflectivity. Used to renovate tired roofs without going through a full replacement, the cool roof waterproofing coating stands out as the most cost-effective solution when the budget doesn't allow a full overhaul. It also remains the smart alternative when the roof isn't yet degraded enough to justify one.
- [s1-heading] How a cool roof waterproofing coating works
- [s1-intro] A cool roof waterproofing coating combines two technical mechanisms on the same substrate.
- [s1-bullet-1] Solar reflectance sends back up to 90% of radiation rather than letting it penetrate the building. CovaSeal 20 has a new SRI of 107, which guarantees an immediate cool roof effect from the very first application.
- [s1-bullet-2] After drying, the elastomeric resin forms a continuous, flexible, and waterproof film that stays bonded to the substrate during thermal expansion. This is what allows CovaSeal 20 to fill micro-cracks up to 2 mm and hold up on areas where water stagnates.
- [s1-outro] The anti-UV Top Coat completes the system. It protects the resin from ultraviolet rays, stabilizes whiteness, and prevents chalking over 20 years.
- [s2-heading] The roofs CovaSeal 20 was designed for
- [s2-intro] CovaSeal 20 is the cool roof waterproofing coating suited to the following situations:
- [s2-bullet-1] Localized micro-cracks or blistering on the existing waterproofing
- [s2-bullet-2] Spot infiltration areas without widespread failure
- [s2-bullet-3] Aging bituminous waterproofing, installed more than a year ago
- [s2-bullet-4] Old EPDM or PVC membranes, more than ten years old
- [s2-bullet-5] Flat or low-slope roofs where water tends to stagnate
- [s2-outro] For a sound roof that only seeks the cool roof effect, the pure cool roof coating CovaTherm remains better suited. Conversely, for an out-of-date roof with massive infiltration and detached sheets, a full overhaul is essential first and foremost.
- [s3-heading] The budget for a cool roof waterproofing coating per square meter
- [s3-intro] The price of a professional cool roof waterproofing coating, installed, averages between €20 and €25 per square meter, all-inclusive: assessment, substrate preparation, supply, and application. Three factors make the final figure vary:
- [s3-bullet-1] The surface area to be treated, with volume discounts beyond 2,000 m²
- [s3-bullet-2] The condition of the substrate, a heavily degraded substrate possibly requiring spot repairs or a reinforcement fleece
- [s3-bullet-3] The complexity of the roof (upstands, drains, penetrations)
- [s3-compare-intro] Compared with traditional alternatives, the gap is clear-cut:
- [s3-compare-1] New bituminous membrane: €80 to €100 / m²
- [s3-compare-2] Insulation + waterproofing replacement: about €150 / m²
- [s3-compare-3] CovaSeal 20 (2-in-1 cool roof waterproofing coating): €20 to €25 / m²
- [s3-outro] CovaSeal 20 cuts the renovation budget by 4 to 7 times, with the added bonus of the cool roof effect and a 20-year warranty. You can estimate the savings of a cool roof waterproofing coating on your building.
- [s4-heading] What an application involves
- [s4-intro] A cool roof waterproofing coating application unfolds in five controlled steps, carried out by trained professional applicators.
- [s4-step-1] Technical assessment. A technician evaluates the condition of the substrate, measures moisture, locates micro-cracks and water-retention areas, and checks material compatibility. A poorly assessed substrate means a coating that blisters or fails to waterproof.
- [s4-step-2] High-pressure cleaning. The roof is cleared of moss, dust, and residue with a high-pressure cleaner, without stripping. Long-term adhesion is determined at this stage.
- [s4-step-3] Base Coat application. The waterproofing layer is sprayed on from the ground, at a rate of 2 to 3 kg/m². The machines stay at the foot of the building, only the hoses go up onto the roof.
- [s4-step-4] Optional reinforcement fleece. On sensitive areas (penetrations, upstands, joints), a polyester fleece is embedded in the resin to double the mechanical hold.
- [s4-step-5] Top Coat application. The anti-UV finish seals the system and guarantees reflectivity over two decades.
- [s4-outro] The application is carried out in dry weather, between 10 and 35 °C. A typical 1,000 m² application is completed in 3 to 5 days, without interrupting the building's operations.
- [s5-heading] The protective effect of a reflective coating on the existing waterproofing
- [s5-para-1] On a conventional dark roof, the surface can exceed 80°C in the height of summer. This heat accelerates membrane aging through three mechanisms: absorption of ultraviolet rays, thermal expansion of materials, and repeated day/night expansion-contraction cycles. Scientific studies on the aging of roof coatings confirm that ultraviolet is the main factor in the degradation of non-metallic materials, with a process strongly dependent on temperature: the greater the daily thermal swings, the faster the degradation (Miller, Kriner & Desjarlais, 2002).
- [s5-para-2] By lowering the roof's surface temperature, the cool roof waterproofing coating drastically limits these three factors. Field trials conducted by the Lawrence Berkeley National Laboratory on commercial buildings showed a surface temperature drop from 79°C to 49°C after application of a reflective coating (Akbari, Berdahl, Levinson et al., 2005). Less heat absorbed means less expansion, fewer cracks, and a waterproofing lifespan extended by 8 to 10 years.
- [s6-heading] A concrete lever against urban heat islands
- [s6-para-1] Beyond the direct benefits for the building, the cool roof waterproofing coating helps reduce the urban heat island effect, the phenomenon that makes city centers on average 2 to 10°C hotter than the surrounding rural areas. Dark roofs and pavements play a major role here by absorbing solar radiation and releasing it as heat.
- [s6-para-2] Research conducted on urban cooling strategies shows that widespread adoption of reflective roofs at the scale of a city could help reduce urban ambient temperature and, consequently, the energy demand tied to air conditioning (Santamouris, 2014). One study even estimated that, at the urban scale, deploying cool roofs could cut heatwave-related mortality by 18%. Applying CovaSeal 20 to an industrial or commercial building means contributing to this collective movement on top of gaining internal comfort.
- [sources-heading] Sources and references
- [source-1] Akbari, H., Berdahl, P., Levinson, R., Wiel, S., Miller, W., & Desjarlais, A. (2005). Aging and Weathering of Cool Roofing Membranes. Lawrence Berkeley National Laboratory / U.S. Department of Energy.
- [source-2] Santamouris, M. (2014). Cooling the cities — a review of reflective and green roof mitigation technologies to fight heat island and improve comfort in urban environments. Solar Energy, 103, 682-703.
- [source-3] Synnefa, A., Santamouris, M., & Akbari, H. (2007). Estimating the effect of using cool coatings on energy loads and thermal comfort in residential buildings in various climatic conditions. Energy and Buildings, 39(11), 1167-1174.
- [source-4] U.S. Environmental Protection Agency (2024). Using Cool Roofs to Reduce Heat Islands.

## [cta-section] Final CTA

- [title] What budget should you plan to treat your roof?
- [subtitle] Personalized estimate within 48 hours, with a first reply within 24 hours, no commitment.
- [primary-cta] Request a quote
- [secondary-cta] Estimate my budget

## [related-products] Other solutions

- [eyebrow] Other solutions
- [heading] Related solutions
- [view-all] All solutions
- [product-covatherm-name] CovaTherm
- [product-covatherm-tag] Cool roof coating
- [product-covatherm-need] Your roof is in good condition and you want to reduce heat and the energy bill.
- [product-covametal-name] CovaMetal 20
- [product-covametal-tag] Steel deck / metal roof
- [product-covametal-need] Your roof is metal, and it's rusting or deforming. 3-in-1: cool roof, anti-corrosion, and waterproofing.
- [product-light-name] CovaTherm Light
- [product-light-tag] Translucent skylights
- [product-light-need] You have polycarbonate or polyester surfaces. Blocks heat while preserving natural light.
- [card-cta] Discover

## [distributor] Become a distributor

- [badge] Distributor network
- [title] Distribute Covalba cool roof coatings
- [body] Are you a materials dealer or a roofing and waterproofing professional? Distribute Covalba cool roof coatings: technical support, sales support, manufacturer terms.
- [benefit-1] Technical training on Covalba cool roof coatings
- [benefit-2] Dedicated technical and sales support
- [benefit-3] Direct supply from the manufacturer on the best terms
- [cta] Learn more
- [image-alt] Covalba cool roof coatings distributor network

## [sticky-mobile-cta] Floating mobile CTA

- [label] Request a quote