About UltraTech Weather Pro Top-Shield EZY

{“name”:”UltraTech Weather Pro Top-Shield EZY”,”slug”:”ultratech-weather-pro-top-shield-ezy”,”brand”:”UltraTech”,”realProduct”:”yes”,”officialSource”:”https://www.ultratechcement.com/content/dam/ultratechcement/tds-leaflet-weather-pro-top-shield-ezy.pdf”,”category”:”waterproofing”,”metaTitle”:”UltraTech Top-Shield EZY | Roof Waterproof Coat | Space Arc”,”metaDescription”:”UltraTech Weather Pro Top-Shield EZY is a single-component hybrid PU-acrylic roof waterproofing coating with 2mm crack bridging, supplied by Space Arc.”,”heroSubtitle”:”A single-component, water-based PU-acrylic hybrid coating that turns a leaking terrace into a sealed, heat-reflective roof — stir and apply, no on-site mixing of two parts, no guesswork on ratios.”,”glance”:{“whatIsIt”:”A single-pack, water-based Hybrid PU (Acrylate-PU) elastomeric waterproofing coating for roofs and terraces — stir and apply, unlike the two-part cementitious coatings that dominate this shelf.”,”whereUsed”:”New and existing RCC roof slabs, brick-bat coba, IPS and cement-screed terraces, parapet walls (with coping), and refurbished roofs on residential, institutional and light-commercial buildings.”,”whyUse”:”Nil water penetration at 5 bar in lab testing, crack bridging up to 2mm, and — with the white top-coat — up to 10°C reduction in roof surface temperature, cutting summer heat load on the floor below.”,”howApplied”:”Self-primed by diluting the first coat 2:1 with water, followed by two full-strength coats by roller, brush or squeegee, the second at right angles to the first, building a 450–500 micron dry film.”},”about”:”UltraTech Weather Pro Top-Shield EZY sits in the newer, single-component corner of UltraTech’s Weather Pro / Top-Shield waterproofing range. Where the cementitious siblings in the same family — Weather Pro Flex and Weather Pro Hi-Flex — are two-part products that need powder and liquid batched correctly on site, Top-Shield EZY is a ready-to-use, water-based Hybrid PU (Acrylate-PU) liquid: stir the pail, dilute the first coat, brush or roll it on. That single-pack format removes one of the commonest site failure points on Indian terraces — labour getting a two-component elastomeric coating’s mix ratio wrong, which shows up months later as patchy adhesion or premature cracking rather than at handover.\n\nFor Delhi NCR’s climate — punishing May-June roof surface temperatures followed by a monsoon that finds every hairline crack in a brick-bat coba terrace — the combination the TDS documents matters in practice: 2mm crack bridging at 250%+ elongation absorbs routine thermal movement instead of splitting, while the white top-coat variant is separately rated to cut surface temperature by up to 10°C. It is a coating system, though, not a structural repair — the manufacturer’s own literature is explicit that unsound screed, hollow patches and shrinkage cracks need polymer-modified mortar and mesh reinforcement before Top-Shield EZY goes on, and it is not rated for expansion joints or vehicle movement.”,”technicalInsight”:”The chemistry is an Acrylate-PU hybrid: acrylic polymer chains cross-link with polyurethane segments as the water carrier evaporates, giving a film that pairs an acrylic’s UV stability with a PU’s elasticity. That’s why the data sheet shows both a 250%+ elongation and a clean ‘Passes’ on 1,000-hour accelerated UV weathering (ASTM G154) rather than the yellowing or embrittlement plain acrylic terrace coatings tend to show after a couple of Delhi summers. At 56±1% solids and a measured 2.36% VOC (IS 101: Part 2: Sec 3), it’s a genuinely low-solvent formulation for an occupied-building product, and the specified 450–500 micron dry film — built from two full-strength coats over a diluted self-primer — is the actual thickness the 5-bar nil-penetration and 2mm crack-bridging figures were tested at, not a theoretical maximum.”,”applications”:[“New and refurbished flat or low-slope RCC roof slabs on independent houses and low-rise apartments”,”Brick-bat coba, IPS and cement-screed terraces due for monsoon-season waterproofing”,”Parapet wall internal faces as part of a complete roof envelope (coping required for full protection)”,”Water-tank tops and other non-trafficked terrace zones within the product’s pressure rating”,”School, hospital and warehouse roofs where the heat-reduction top-coat trims top-floor cooling load”,”Roofs previously treated with failing bituminous felt, after the old membrane is fully stripped”,”Housing-society terrace recoating where the existing screed is sound but the old waterproofing has aged out”],”advantages”:[“Single-component, ready-to-stir liquid — removes the two-part mixing-ratio errors common on site with cementitious elastomeric coatings”,”Self-priming system (first coat diluted 2:1 with water) shortens the material list and the number of site trips”,”2mm crack bridging at 250%+ elongation (ASTM D 412) absorbs routine shrinkage and thermal movement”,”Nil water penetration at 5 bar per EN 12390-8 under the lab-tested 450–500 micron film”,”White top-coat option independently rated to cut roof surface temperature by up to 10°C (ASTM D 4803)”,”Water-based, low-VOC (2.36% per IS 101) formulation — non-flammable and more forgiving on occupied sites”,”UV-stable per 1,000-hour accelerated weathering (ASTM G154) and resistant to algae/fungal growth (SS 345:2015)”],”limitations”:[“Not recommended over expansion or moving joints — those need a dedicated sealant/joint system, not this coating”,”Rated for foot traffic only; not suitable for vehicular or heavy mechanical movement on the terrace”,”Narrow application window — substrate must be 10–35°C, and rain within 48 hours of application must be avoided”,”No warranty against dirt pick-up or gloss/sheen reduction on the white top-coat as it weathers over time”,”Needs a full 7-day air cure before any flood or pond test — and fresh screed/IPS beneath it needs 4–6 weeks’ cure first, so it isn’t a same-week fix on new construction”],”bestPractice”:”Work only on a sound, SSD (saturated surface-dry) substrate — high-pressure wash first, strip every trace of old bitumen, and let fresh screed or IPS cure a full 4–6 weeks before coating. Self-prime with Top-Shield EZY diluted 2:1 with water at 9–10 sqm/litre, let it soak in and dry, then apply two full-strength coats at 2.0–2.2 sqm/litre each, with the second coat rolled perpendicular to the first to even out the 450–500 micron film and a 4–6 hour gap between coats. Pre-treat every crack, corner, drain outlet and parapet joint with a primer coat plus a mesh-reinforced wet coat extending 75mm either side before the field coats go on, and hold off any flood test for a full 7-day cure — maximum 50mm of standing water for 24–48 hours, never sooner.”,”specs”:[{“property”:”Chemistry / system”,”value”:”Single-component, water-based Hybrid PU (Acrylate-PU) elastomeric coating”},{“property”:”Appearance”,”value”:”Viscous liquid”},{“property”:”Solid content”,”value”:”56 ± 1% by weight”},{“property”:”VOC”,”value”:”2.36% (IS 101: Part 2: Sec 3: 2015)”},{“property”:”Tensile strength @ 500 micron DFT”,”value”:”Min. 2 MPa (ASTM D 412-2016)”},{“property”:”Elongation at break”,”value”:”Min. 250% (ASTM D 412-2016)”},{“property”:”Crack bridging”,”value”:”2 mm (EN 1062-7:2004)”},{“property”:”Water penetration @ 5 bar”,”value”:”Nil (EN 12390-8:2019)”},{“property”:”Pack sizes / shelf life”,”value”:”1L, 4L, 10L, 20L; 36 months from manufacture”}],”useCases”:[{“sector”:”Residential (independent houses)”,”detail”:”Pre-monsoon waterproofing of brick-bat coba terraces in Delhi NCR, self-primed and rolled in two coats over a cleaned, SSD screed.”},{“sector”:”Institutional (schools, hospitals)”,”detail”:”Re-roofing with the white top-coat variant specifically to cut top-floor solar heat gain and reduce AC load through peak summer.”},{“sector”:”Light industrial / warehousing”,”detail”:”RCC roof waterproofing where the deck sees only occasional foot traffic for maintenance, not forklifts or stored loads.”},{“sector”:”Builder / developer handover”,”detail”:”New-build terrace waterproofing at OC stage, sequenced after the mandatory 4–6 week screed cure so the coating isn’t rushed onto green concrete.”},{“sector”:”Housing society AMC work”,”detail”:”Recoating an ageing but structurally sound terrace where localised crack and joint repair with PMM precedes the EZY coats.”}],”faq”:[{“q”:”Can Top-Shield EZY go directly over the old bitumen felt already on my terrace?”,”a”:”No. The manufacturer’s data sheet is explicit that any existing bituminous coating must be fully removed and the substrate properly prepared first — adhesion of Top-Shield EZY over old bitumen isn’t tested or warranted.”},{“q”:”How is EZY different from the other UltraTech Weather Pro / Top-Shield products?”,”a”:”Weather Pro Flex and Weather Pro Hi-Flex in the same UltraTech range are two-component cementitious elastomeric coatings mixed on site from powder and liquid. Top-Shield EZY is a single-pack, water-based PU-acrylic liquid — quicker to apply and less exposed to site mixing errors, though the cementitious versions can suit different substrate or budget scenarios.”},{“q”:”How much will I need for a 1,000 sq ft terrace?”,”a”:”1,000 sq ft is about 93 sqm. At the documented system coverage of 1.0–1.1 sqm/litre (self-prime plus two coats to 450–500 micron DFT), that works out to roughly 85–93 litres — plan for around five 20-litre pails allowing for wastage and porous patches.”},{“q”:”Do I need to buy a separate primer?”,”a”:”No. The product is self-priming — the first coat, diluted 2:1 with clean water, functions as the primer coat before the two full-strength field coats go on.”},{“q”:”Can we park a car or a genset on the coated terrace?”,”a”:”No. The coating is rated for foot traffic only; vehicular or heavy mechanical movement isn’t covered and will damage the film.”},{“q”:”How soon can the terrace take monsoon rain or a flood test after coating?”,”a”:”Allow a minimum 7-day air cure before any flood or pond test (max. 50mm standing water for 24–48 hours), and avoid application altogether if rain is expected within 48 hours of coating.”}],”positioning”:”Within UltraTech’s own waterproofing shelf at Space Arc, Top-Shield EZY is the single-component, faster-to-apply option; UltraTech Weather Pro Flex and Weather Pro Hi-Flex cover the same roof-waterproofing job with two-part cementitious elastomeric systems, and UltraTech Seal & Dry / Seal & Dry 5 Plus are the admixture-and-coating route for wet areas like bathrooms and sunken slabs rather than open terraces. Where a specifier wants a factory-proportioned, cementitious membrane instead of a liquid-applied PU-acrylic film — for instance on a water-retaining structure or a substrate where a brushable cementitious build is preferred — Fosroc’s Brushbond UltraFlex is a genuine equivalent in the same elastomeric-membrane category, and Space Arc stocks and applies both so the choice can be made on substrate and budget rather than brand availability.”,”fosrocAlternative”:{“name”:”Brushbond UltraFlex”,”slug”:”fosroc-brushbond-ultraflex”,”note”:”A specifier might choose Brushbond UltraFlex over Top-Shield EZY when a factory-proportioned, two-component cementitious elastomeric membrane is preferred to a single-pack liquid-applied PU-acrylic coating — for example on water-retaining structures or where FDA CFR 175-300 potable-water compliance is a project requirement.”}}

The technical insight

The chemistry is an Acrylate-PU hybrid: acrylic polymer chains cross-link with polyurethane segments as the water carrier evaporates, giving a film that pairs an acrylic’s UV stability with a PU’s elasticity. That’s why the data sheet shows both a 250%+ elongation and a clean ‘Passes’ on 1,000-hour accelerated UV weathering (ASTM G154) rather than the yellowing or embrittlement plain acrylic terrace coatings tend to show after a couple of Delhi summers. At 56±1% solids and a measured 2.36% VOC (IS 101: Part 2: Sec 3), it’s a genuinely low-solvent formulation for an occupied-building product, and the specified 450–500 micron dry film — built from two full-strength coats over a diluted self-primer — is the actual thickness the 5-bar nil-penetration and 2mm crack-bridging figures were tested at, not a theoretical maximum.

Where it is used

• New and refurbished flat or low-slope RCC roof slabs on independent houses and low-rise apartments
• Brick-bat coba, IPS and cement-screed terraces due for monsoon-season waterproofing
• Parapet wall internal faces as part of a complete roof envelope (coping required for full protection)
• Water-tank tops and other non-trafficked terrace zones within the product’s pressure rating
• School, hospital and warehouse roofs where the heat-reduction top-coat trims top-floor cooling load
• Roofs previously treated with failing bituminous felt, after the old membrane is fully stripped
• Housing-society terrace recoating where the existing screed is sound but the old waterproofing has aged out

Key advantages

• Single-component, ready-to-stir liquid — removes the two-part mixing-ratio errors common on site with cementitious elastomeric coatings
• Self-priming system (first coat diluted 2:1 with water) shortens the material list and the number of site trips
• 2mm crack bridging at 250%+ elongation (ASTM D 412) absorbs routine shrinkage and thermal movement
• Nil water penetration at 5 bar per EN 12390-8 under the lab-tested 450–500 micron film
• White top-coat option independently rated to cut roof surface temperature by up to 10°C (ASTM D 4803)
• Water-based, low-VOC (2.36% per IS 101) formulation — non-flammable and more forgiving on occupied sites
• UV-stable per 1,000-hour accelerated weathering (ASTM G154) and resistant to algae/fungal growth (SS 345:2015)

Limitations & considerations

• Not recommended over expansion or moving joints — those need a dedicated sealant/joint system, not this coating
• Rated for foot traffic only; not suitable for vehicular or heavy mechanical movement on the terrace
• Narrow application window — substrate must be 10–35°C, and rain within 48 hours of application must be avoided
• No warranty against dirt pick-up or gloss/sheen reduction on the white top-coat as it weathers over time
• Needs a full 7-day air cure before any flood or pond test — and fresh screed/IPS beneath it needs 4–6 weeks’ cure first, so it isn’t a same-week fix on new construction

Selection & best practice

Specifications

Industry use cases

How we position UltraTech Weather Pro Top-Shield EZY

Within UltraTech’s own waterproofing shelf at Space Arc, Top-Shield EZY is the single-component, faster-to-apply option; UltraTech Weather Pro Flex and Weather Pro Hi-Flex cover the same roof-waterproofing job with two-part cementitious elastomeric systems, and UltraTech Seal & Dry / Seal & Dry 5 Plus are the admixture-and-coating route for wet areas like bathrooms and sunken slabs rather than open terraces. Where a specifier wants a factory-proportioned, cementitious membrane instead of a liquid-applied PU-acrylic film — for instance on a water-retaining structure or a substrate where a brushable cementitious build is preferred — Fosroc’s Brushbond UltraFlex is a genuine equivalent in the same elastomeric-membrane category, and Space Arc stocks and applies both so the choice can be made on substrate and budget rather than brand availability.

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