About Dr. Fixit Cool Roof Coating

{“name”: “Dr. Fixit Cool Roof Coating”, “slug”: “drfixit-dr-fixit-cool-roof-coating”, “brand”: “Dr. Fixit”, “realProduct”: “yes”, “officialSource”: “https://www.drfixit.co.in/resources/library/technical-data/large-projects/dr-fixit-cool-roof-coating”, “category”: “protective-coatings-corrosion”, “metaTitle”: “Dr. Fixit Cool Roof Coating | Solar-Reflective | Space Arc”, “metaDescription”: “Dr. Fixit Cool Roof Coating is an SRI-108 heat-reflective acrylic coating for metal and concrete roofs, applied Pan-India by Space Arc Engineering.”, “heroSubtitle”: “A single-component, UV cross-linking acrylic coating that reflects solar heat off metal and concrete roofs while doubling as a waterproofing membrane.”, “glance”: {“whatIsIt”: “A single-component, water-based, 100% pure acrylic elastomeric coating engineered with UV cross-linkable polymer technology, purpose-built to reflect solar heat (SRI 108 to ASTM E1980) while also waterproofing the roof deck beneath it.”, “whereUsed”: “Galvanised (GI) corrugated sheets, pre-coated/colour-coated metal roofing panels, cement fibre sheets and RCC concrete screed terraces on factories, warehouses, shopping malls, clubs and similar large-roof buildings across India.”, “whyUse”: “It lowers roof surface temperature by reflecting solar radiation rather than absorbing it, cuts the cooling load on the building below, waterproofs the deck in the same film, resists dirt pick-up, algae and fungal growth, and carries a 5-year warranty for film integrity.”, “howApplied”: “Applied cold by brush, roller or spray in two top coats over a cleaned, primed and repaired substrate — anti-corrosion or epoxy primer on metal sheets, a diluted bonding primer on concrete screed — with joints, seams and fasteners reinforced with polyester fabric mesh, to a specified combined dry film thickness (400 micron on metal, 450-500 micron on screed).”}, “about”: “Indian roofs — factory sheds, warehouse sheets, mall terraces, apartment decks — spend eight or nine months a year absorbing direct sun, and a dark or weathered roof can run 15-20°C hotter than the air around it, pushing up both the indoor temperature and the air-conditioning bill below. Dr. Fixit Cool Roof Coating, from Pidilite’s Dr. Fixit Coatings & Paints range, is built to interrupt that heat gain at the source. It is a single-component, water-based, 100% pure acrylic coating engineered with UV cross-linkable polymer technology: once applied, exposure to natural sunlight drives a UV cross-linking reaction in the film that keeps toughening it after it dries, turning it into an elastic, abrasion-resistant, highly heat-reflective membrane rather than a coating that simply cures once and then slowly degrades. Independently tested Solar Reflectance Index of 108 (to ASTM E1980) sits it in the high-reflectance band used for cool-roof specifications, and because the same UV-cured film also resists dirt pick-up, algae and fungal growth, it is designed to hold onto that whiteness — and therefore that reflectivity — for longer than an ordinary white paint or roof coat.\n\nWhat makes it a genuine roofing product rather than just a reflective paint is that it is also a tested waterproofing membrane in its own right: nil water permeability at 5 bar, a pull-off adhesion of 1.5 N/mm² on both concrete and metal, and 190% elongation with 1.5mm crack-bridging ability so it can move with a metal sheet’s daily thermal expansion and contraction without splitting. Space Arc Engineering, as an authorised Dr. Fixit distributor and applicator for Delhi NCR and Pan-India, supplies and installs Cool Roof Coating as part of a full system — surface repair, correct primer selection for the substrate, fabric-reinforced detailing at joints and fasteners, and the two-coat top system — rather than selling the pail as a stand-alone product, because on this coating the system, not just the material, determines how long the reflectivity and the waterproofing actually last.”, “technicalInsight”: “The property that separates a genuine cool-roof coating from a can of white paint is what happens after it dries, not before. Ordinary acrylic or emulsion paints cure once as the water evaporates and then begin an irreversible slide — chalking, yellowing and picking up dirt — that steadily drags their reflectance down within a couple of seasons. Dr. Fixit Cool Roof Coating is instead built on a UV cross-linkable polymer: the initial film is only the starting point, and continued exposure to sunlight triggers a cross-linking reaction that keeps densifying the film, which is why Pidilite can publish an ‘Accelerated Weathering — 1000 hrs, No Cracking’ result (ASTM D4798) and back the film integrity for 5 years. The Solar Reflectance Index of 108 (ASTM E1980) is the number that actually matters for a cool-roof claim — SRI combines both solar reflectance and thermal emittance into one figure, and 108 places this coating well above a typical galvanised or bitumen-coated roof, which is why Pidilite markets it specifically for factories, warehouses, shopping malls and clubs where a large flat or profiled roof translates directly into HVAC load. Two other numbers on the datasheet are easy to miss but matter on-site: the ASTM E108:2020 Class A spread-of-flame rating, relevant wherever a factory or warehouse roof has to satisfy a fire code, and the crack-bridging figure of 1.5mm (EN1062) combined with 190% elongation, which is what lets the same film sit on a GI sheet that expands and contracts every single day without the reflective surface splitting open over its edges.”, “applications”: [“Heat-reflective coating for galvanised (GI) corrugated roofing sheets on factory and warehouse sheds”, “Pre-coated/colour-coated metal roofing panels needing a reflective, waterproof refurbish coat”, “Cement fibre roofing sheets on industrial and institutional buildings”, “RCC concrete screed terraces and flat roofs subject to foot traffic only”, “Shopping mall, retail and multiplex roof decks seeking a lower rooftop unit and HVAC load”, “Clubs, resorts and institutional campuses pursuing energy-efficient roof retrofits”, “Pre-engineered building (PEB) metal roofs on new industrial sheds”, “Retrofit heat-reflective recoating of old, faded or chalking metal roof sheets”], “advantages”: [“Independently tested SRI of 108 (ASTM E1980) — a genuine, documented solar-reflectance figure, not just a marketing claim of ‘cool'”, “UV cross-linking acrylic chemistry keeps curing and toughening under sunlight rather than degrading like an ordinary paint film”, “Elastomeric with 190% elongation and 1.5mm crack-bridging ability (EN1062), so the film moves with a metal roof’s daily thermal cycling”, “Doubles as a waterproofing membrane — nil water permeability at 5 bar and ≥1.5 N/mm² pull-off adhesion on both concrete and metal”, “ASTM E108:2020 Class A fire-spread rating, relevant where factory/warehouse roofs must meet fire-safety codes”, “Resists algae, fungal growth and (per the datasheet) dirt pick-up, helping the roof retain its reflective whiteness with age”, “Single-component, ready-to-use product — no on-site batching or mix-ratio errors to get wrong”, “5-year warranty for film integrity backs a genuinely tested, standards-referenced product”], “limitations”: [“Designed only for foot traffic on the concrete-screed system, not vehicular movement or machinery”, “Narrow application window — not below 10°C or above 35°C surface temperature, and not within 48 hours of expected rain”, “Cannot be applied directly over expansion or moving joints; these need to be detailed separately, not simply coated over”, “Pidilite explicitly excludes warranty coverage for dirt pick-up, even though the datasheet lists dirt-pick-up resistance as a feature”, “Supplied in white only, in 20-litre pails — no colour options for projects with an architectural colour brief”, “Fresh cement-sand screed must be allowed to age a minimum of 12 weeks before coating, ruling it out on fast-track handovers”], “bestPractice”: “Treat this as a two-part system, not a single coat, and prepare each substrate on its own terms. On metal roofs: power-wash at a minimum 2000 psi to strip loose coatings, rust, dust and old bitumen treatments; replace stripped fasteners with the next larger size; wire-brush or sand-blast unsound rust; then prime the full roof and gutters with one coat of Dr. Fixit Primer AC (5-8 m²/litre) on bare GI sheet, or Dr. Fixit Cipoxy 16D epoxy primer on powder-coated sheet. Seal every lap joint, seam and fastener with a liberal coat of Cool Roof Coating reinforced with 40-50 GSM polyester fabric mesh or non-woven geotextile fleece before the general top coats go on. Apply two top coats at 2.7-3.0 m²/litre/coat to reach a combined 400-micron DFT, waiting 4-6 hours and running the second coat diagonally to the first, then allow 7 days of air cure. On concrete screed roofs: repair hollow or damaged sections with Dr. Fixit Pidicrete URP, widen and V-cut cracks over 0.5mm and fill with Dr. Fixit PU Sealant after priming with Dr. Fixit Pidiprime A, confirm a minimum roof slope of 1 in 100, and bond-prime the SSD (saturated-surface-dry) substrate with Dr. Fixit Primeseal diluted 2:1. Apply two undiluted top coats at 2.2-2.4 m²/litre/coat to reach 450-500 micron combined DFT, give corners, gaps, joints and drain outlets two extra coats, and hold off if rain is expected within 48 hours. Use the coverage-rate method on-site to confirm the specified DFT is actually being achieved, not just that the surface looks covered.”, “specs”: [{“property”: “Nature”, “value”: “Single component, water-based, 100% pure acrylic”}, {“property”: “Solids content (by wt.)”, “value”: “68 ± 1% (ASTM D 1644)”}, {“property”: “Elongation at break”, “value”: “190% (ASTM D 412)”}, {“property”: “Tensile strength”, “value”: “≥ 1.5 N/mm² (ASTM D 412)”}, {“property”: “Pull-off adhesion (concrete & metal sheet)”, “value”: “≥ 1.50 N/mm² (ASTM D 4541)”}, {“property”: “Crack-bridging ability”, “value”: “1.5 mm (EN 1062)”}, {“property”: “Solar Reflectance Index (SRI)”, “value”: “108 (ASTM E 1980-01)”}, {“property”: “Fire resistance (spread of flame)”, “value”: “Class A (ASTM E 108:2020)”}, {“property”: “Coverage / packaging”, “value”: “2.2-3.0 m²/litre/coat (system-dependent); 20-litre pails, white only”}], “useCases”: [{“sector”: “Industrial sheds & warehouses”, “detail”: “Recoating faded, sun-baked GI roofing sheets on factory and warehouse roofs to cut peak internal temperatures and pull down cooling costs on large uninsulated metal roofs.”}, {“sector”: “Retail & commercial”, “detail”: “Shopping mall and multiplex roof decks where reducing rooftop HVAC load has a direct, measurable impact on the building’s energy bill.”}, {“sector”: “Institutional & hospitality”, “detail”: “Clubs, schools and resort buildings where an energy-efficiency upgrade is wanted without a full roof replacement.”}, {“sector”: “Residential & apartment terraces”, “detail”: “RCC terrace re-coating on apartment blocks and independent houses, foot-traffic-only, combining heat reduction with a genuine secondary waterproofing layer.”}, {“sector”: “Pre-engineered buildings (PEB)”, “detail”: “New PEB metal roofs specified with a reflective, fire-rated top coat from the outset rather than retrofitted later.”}], “faq”: [{“q”: “Does Dr. Fixit Cool Roof Coating actually lower the indoor temperature, or is ‘cool roof’ just a marketing name?”, “a”: “The reflectance is a tested, documented figure — SRI 108 to ASTM E1980 — not an unverified claim, so the coating genuinely reflects more solar radiation than a standard metal or bitumen roof. How much that translates into indoor comfort depends on other factors too: roof insulation, ceiling height, ventilation and the building’s overall thermal design, so treat it as one part of a cooling strategy rather than a replacement for insulation on a poorly insulated roof.”}, {“q”: “Can it be applied directly over an old, rusted GI sheet roof without any preparation?”, “a”: “No. The datasheet is explicit that loose coatings, heavy rust, debris and any bitumen-based treatment must be removed first, corroded areas rust-treated, and the surface power-washed and primed with Dr. Fixit Primer AC (or Cipoxy 16D on powder-coated sheet) before the Cool Roof Coating goes on. Skipping prep is the single most common cause of early adhesion failure on metal roofs.”}, {“q”: “Is the coated roof walkable, and can vehicles or equipment be placed on it?”, “a”: “On the concrete-screed system it is rated for foot traffic only — Pidilite specifically excludes vehicular movement and machinery. On metal roofs it is a coating, not a walking surface, and normal roof-access precautions apply regardless of the coating.”}, {“q”: “How many coats does it need, and what coverage should I plan for?”, “a”: “Two top coats over the correct primer in both systems. On GI/metal roofs, plan 2.7-3.0 m² per litre per coat for a combined 400-micron DFT; on concrete screed, plan 2.2-2.4 m² per litre per coat for 450-500 micron combined DFT. Always add roughly 10% to the measured roof area on profiled metal sheets to allow for the panel profile.”}, {“q”: “Does it come in colours other than white?”, “a”: “No. It is supplied only in white, in 20-litre pails — white is also functionally necessary, since the high reflectance is tied to the pigment system. If an architectural colour is required elsewhere on the building, that has to be handled with a separate product, not this one.”}, {“q”: “What warranty backs the product, and are there any exclusions?”, “a”: “Pidilite offers a 5-year warranty for film integrity. It’s worth reading the fine print, though: the datasheet explicitly states Pidilite does not warranty against dirt pick-up on Cool Roof Coating, even though dirt-pick-up resistance is listed as a feature, so ongoing roof cleanliness is on the building owner, not the manufacturer.”}], “positioning”: “Within Dr. Fixit’s own Coatings & Paints range, Cool Roof Coating occupies a specific niche: it’s the SRI-rated, heat-reflective specialist, not a general-purpose roof waterproofer. For a roof where energy reduction isn’t the priority and the brief is simply ‘stop the leak,’ Dr. Fixit’s Raincoat and Newcoat ranges (or Pidicrete URP for structural repair before any topcoat) are the more conventional choice; Cool Roof Coating earns its place specifically when the roof is large, exposed and expensive to cool — a factory shed, warehouse or mall deck — where the SRI 108 figure and Class A fire rating actually matter to the specification. On the metal-roof system it also depends on Dr. Fixit’s own primers (Primer AC for bare GI, Cipoxy 16D for powder-coated sheet) and PU Sealant for joint detailing, so it is best specified as a complete Dr. Fixit system rather than mixed with third-party primers. Outside the Dr. Fixit range, the nearest genuine Fosroc counterpart isn’t a like-for-like cool-roof acrylic — Fosroc doesn’t market a standalone SRI-rated roof coating in quite the same positioning — but Fosroc’s Nitoproof Reflectacoat, a leafing-aluminium reflective topcoat, serves an overlapping function of shielding an exposed roof membrane from UV and solar heat. A specifier already committed to a Fosroc waterproofing system (Nitoproof 600 and similar) who wants a reflective finishing layer would reach for Reflectacoat to keep single-brand compatibility, whereas Dr. Fixit Cool Roof Coating is chosen when the reflective coating itself, with a documented SRI and fire rating, is the primary specification requirement rather than a UV-protective afterthought to another membrane.”}

The technical insight

The property that separates a genuine cool-roof coating from a can of white paint is what happens after it dries, not before. Ordinary acrylic or emulsion paints cure once as the water evaporates and then begin an irreversible slide — chalking, yellowing and picking up dirt — that steadily drags their reflectance down within a couple of seasons. Dr. Fixit Cool Roof Coating is instead built on a UV cross-linkable polymer: the initial film is only the starting point, and continued exposure to sunlight triggers a cross-linking reaction that keeps densifying the film, which is why Pidilite can publish an ‘Accelerated Weathering — 1000 hrs, No Cracking’ result (ASTM D4798) and back the film integrity for 5 years. The Solar Reflectance Index of 108 (ASTM E1980) is the number that actually matters for a cool-roof claim — SRI combines both solar reflectance and thermal emittance into one figure, and 108 places this coating well above a typical galvanised or bitumen-coated roof, which is why Pidilite markets it specifically for factories, warehouses, shopping malls and clubs where a large flat or profiled roof translates directly into HVAC load. Two other numbers on the datasheet are easy to miss but matter on-site: the ASTM E108:2020 Class A spread-of-flame rating, relevant wherever a factory or warehouse roof has to satisfy a fire code, and the crack-bridging figure of 1.5mm (EN1062) combined with 190% elongation, which is what lets the same film sit on a GI sheet that expands and contracts every single day without the reflective surface splitting open over its edges.

Where it is used

• Heat-reflective coating for galvanised (GI) corrugated roofing sheets on factory and warehouse sheds
• Pre-coated/colour-coated metal roofing panels needing a reflective, waterproof refurbish coat
• Cement fibre roofing sheets on industrial and institutional buildings
• RCC concrete screed terraces and flat roofs subject to foot traffic only
• Shopping mall, retail and multiplex roof decks seeking a lower rooftop unit and HVAC load
• Clubs, resorts and institutional campuses pursuing energy-efficient roof retrofits
• Pre-engineered building (PEB) metal roofs on new industrial sheds
• Retrofit heat-reflective recoating of old, faded or chalking metal roof sheets

Key advantages

• Independently tested SRI of 108 (ASTM E1980) — a documented solar-reflectance figure, not just a marketing claim
• UV cross-linking acrylic chemistry keeps curing and toughening under sunlight rather than degrading like an ordinary paint film
• Elastomeric with 190% elongation and 1.5mm crack-bridging ability (EN1062), moving with a metal roof’s daily thermal cycling
• Doubles as a waterproofing membrane — nil water permeability at 5 bar and ≥1.5 N/mm² pull-off adhesion on concrete and metal
• ASTM E108:2020 Class A fire-spread rating, relevant where factory/warehouse roofs must meet fire-safety codes
• Resists algae, fungal growth and dirt pick-up, helping the roof retain its reflective whiteness with age
• Single-component, ready-to-use product — no on-site batching or mix-ratio errors
• 5-year warranty for film integrity backs a tested, standards-referenced product

Limitations & considerations

• Designed only for foot traffic on the concrete-screed system, not vehicular movement or machinery
• Narrow application window — not below 10°C or above 35°C surface temperature, and not within 48 hours of expected rain
• Cannot be applied directly over expansion or moving joints; these need to be detailed separately, not simply coated over
• Pidilite explicitly excludes warranty coverage for dirt pick-up, even though the datasheet lists dirt-pick-up resistance as a feature
• Supplied in white only, in 20-litre pails — no colour options for projects with an architectural colour brief
• Fresh cement-sand screed must be allowed to age a minimum of 12 weeks before coating, ruling it out on fast-track handovers

Selection & best practice

Specifications

Industry use cases

How we position Dr. Fixit Cool Roof Coating

Within Dr. Fixit’s own Coatings & Paints range, Cool Roof Coating occupies a specific niche: it’s the SRI-rated, heat-reflective specialist, not a general-purpose roof waterproofer. For a roof where energy reduction isn’t the priority and the brief is simply ‘stop the leak,’ Dr. Fixit’s Raincoat and Newcoat ranges (or Pidicrete URP for structural repair before any topcoat) are the more conventional choice; Cool Roof Coating earns its place specifically when the roof is large, exposed and expensive to cool — a factory shed, warehouse or mall deck — where the SRI 108 figure and Class A fire rating actually matter to the specification. On the metal-roof system it also depends on Dr. Fixit’s own primers (Primer AC for bare GI, Cipoxy 16D for powder-coated sheet) and PU Sealant for joint detailing, so it is best specified as a complete Dr. Fixit system rather than mixed with third-party primers. Outside the Dr. Fixit range, the nearest genuine Fosroc counterpart isn’t a like-for-like cool-roof acrylic — Fosroc doesn’t market a standalone SRI-rated roof coating in quite the same positioning — but Fosroc’s Nitoproof Reflectacoat, a leafing-aluminium reflective topcoat, serves an overlapping function of shielding an exposed roof membrane from UV and solar heat. A specifier already committed to a Fosroc waterproofing system (Nitoproof 600 and similar) who wants a reflective finishing layer would reach for Reflectacoat to keep single-brand compatibility, whereas Dr. Fixit Cool Roof Coating is chosen when the reflective coating itself, with a documented SRI and fire rating, is the primary specification requirement rather than a UV-protective afterthought to another membrane.

Related Protective Coatings products

View all Protective Coatings products →