About Asian Paints SmartCare SmartCare Ultra Block 2K

{“name”:”SmartCare Ultra Block 2K”,”slug”:”smartcare-ultra-block-2k”,”brand”:”Asian Paints SmartCare”,”realProduct”:”yes”,”officialSource”:”https://static.asianpaints.com/content/dam/asian_paints/restricted/ultrablock-2k.pdf”,”category”:”waterproofing”,”metaTitle”:”SmartCare Ultra Block 2K | Waterproof Coating | Space Arc”,”metaDescription”:”Two-component acrylic-polymer coating that resists 5 bar hydrostatic pressure for terraces, bathrooms, balconies and water tanks — applied by Space Arc.”,”heroSubtitle”:”A two-component acrylic-polymer slurry that shrugs off 5 bar of positive hydrostatic pressure — brush-applied, seamless waterproofing for terraces, wet areas and water tanks, supplied and installed by Space Arc across Delhi NCR.”,”glance”:{“whatIsIt”:”A two-component system — factory-blended cementitious powder mixed on site with an acrylic liquid polymer at 60:40 by weight — that cures into a seamless, elastic waterproof membrane mechanically and chemically bonded to masonry or concrete.”,”whereUsed”:”RCC terraces, parapets and sunshades; bathroom, toilet and sunken-slab floors; balconies; swimming pool shells; and overhead or underground water tanks and reservoirs — anywhere a cementitious surface needs positive-side waterproofing.”,”whyUse”:”It resists up to 5 bar of positive hydrostatic pressure, stretches to roughly 200% elongation to bridge hairline cracks, forms a jointless film with no laps to fail, and is CFTRI food-grade certified for potable water tank linings.”,”howApplied”:”Slowly stir powder into liquid polymer (60:40 by weight) with a mechanical mixer, rest the slurry 5-6 minutes to release trapped air, then brush or roller two coats at right angles to each other onto a saturated-surface-dry substrate, totalling a minimum 2 kg/m², with a 4-6 hour gap between coats and 3-5 days of curing before the surface goes into service.”},”technicalInsight”:”Ultra Block 2K sits in the acrylic-polymer-modified cementitious (PMC) category — a step up from plain cement slurries and single-component acrylic waterproof paints. The liquid polymer component isn’t just a mixing convenience; it lowers the capillary porosity of the cured cement matrix and imparts genuine elastomeric behaviour, which is why the TDS reports ~200% elongation at break against ASTM D 2370 rather than the single-digit figures typical of unmodified cementitious coatings. That elasticity, combined with a documented 1.3 MPa adhesion strength (ASTM D 7234) to cementitious substrates, is what lets a 1 mm-thick, two-coat film resist up to 5 bar of positive hydrostatic pressure per EN 12390-8 without a fabric reinforcement layer — useful for tanks and pool shells where a torn or delaminated membrane would otherwise be invisible until it leaks. The trade-off specifiers should understand is that all this performance is measured on the positive (water-facing) side of the structure in a controlled lab test at exactly 2 kg/m² consumption; under-dosing on porous or AAC-block substrates, or applying before the substrate reaches saturated-surface-dry condition, is the single most common cause of site failures with this class of product.”,”applications”:[“RCC terraces, roof slabs, parapets and sunshades ahead of tiling or exposed weathering”,”Bathroom and toilet floors and walls beneath tile, including sunken (recessed) slab portions”,”Balconies and utility decks exposed to standing or ponding water”,”Swimming pool shells, as the structural waterproofing layer beneath the finish”,”Overhead and underground water tanks and reservoirs, including potable-water applications”,”Brick and block masonry showing rising damp, moisture staining or efflorescence”,”External masonry facades where carbonation and moisture ingress threaten reinforcement”,”Renovation retrofits over old, sound cementitious surfaces that have started leaking”],”advantages”:[“Resists up to 5 bar positive hydrostatic pressure — genuinely suited to submerged and water-retaining structures, not just splash zones”,”High elongation (~200%) delivers real crack-bridging rather than a rigid, crack-prone film”,”Seamless, jointless coat removes the lap-seam weak points inherent to sheet membranes”,”Anti-efflorescence and anti-carbonation action protects both finish and underlying reinforcement”,”CFTRI food-grade certification makes it usable on potable water tank linings”,”Brush or roller application — no torching, hot-air welding or specialist membrane skills needed on site”,”Water-based, lead/mercury/chromium-free formulation”,”Backed by Asian Paints’ warranty of up to 5 years when installed per specification by an authorised applicator”],”limitations”:[“A positive-side topical coating, not a substitute for injection grouting or waterstops at active construction/movement joints”,”Performance is dose-dependent: under 2 kg/m² coverage, especially on porous or AAC-block surfaces, measurably weakens the barrier”,”Demands a strictly saturated-surface-dry substrate and disciplined 3-5 day cure — flood-curing or premature ponding tests void performance”,”Fresh concrete or masonry must be allowed to age 28 days before application, which can clash with tight construction schedules”,”Supplied only in grey and only as a 12 kg pack, so larger jobs need multiple kits mixed to consistent 60:40 batches by hand”,”Being a hand-mixed two-component system, achieved film thickness is operator-dependent unless site supervision enforces the coat/consumption discipline”],”bestPractice”:”Treat surface preparation as half the job: the substrate must be sound, free of oil and loose material, with cracks and voids repaired before the coating goes on, and it must be in saturated-surface-dry (SSD) condition — not wet, not bone dry — when the first coat is applied. Mix mechanically, always adding powder into the liquid polymer (never water, never the reverse), and let the slurry stand 5-6 minutes to de-air before brushing it on. Apply the two coats in perpendicular directions to eliminate pinholes, respect the 4-6 hour recoat window, and hold consumption to at least 2 kg/m² across both coats — Space Arc site teams measure this by pack count against area rather than trusting it will “stretch.” Where the substrate is brick, overlay the cementitious screed (SmartCare Vitalia Neo is Asian Paints’ own recommendation for this) within 24-48 hours of the second coat, and give the finished system a full 3-5 days of cure — protected from rain and never flood-tested — before tiling, filling a tank, or putting it into service.”,”specs”:[{“property”:”Chemistry / System”,”value”:”Two-component acrylic-polymer-modified cementitious coating”},{“property”:”Mix Ratio (Powder : Liquid)”,”value”:”60 : 40 by weight”},{“property”:”Recommended Consumption”,”value”:”≥ 2 kg/m² in 2 coats”},{“property”:”Film Thickness (2 coats)”,”value”:”1 ± 0.1 mm (ASTM D 3767:2003)”},{“property”:”Positive Hydrostatic Pressure Resistance”,”value”:”Up to 5 bar (EN 12390-8:2019)”},{“property”:”Tensile Strength”,”value”:”1 ± 0.2 MPa (ASTM D 2370:2016)”},{“property”:”Elongation at Break”,”value”:”200 ± 40% (ASTM D 2370:2016)”},{“property”:”Adhesion Strength”,”value”:”1.3 ± 0.2 MPa (ASTM D 7234:2022)”},{“property”:”Pack Size / Shelf Life”,”value”:”12 kg; 12 months from manufacture, unopened, cool & dry storage”}],”useCases”:[{“sector”:”Residential”,”detail”:”Terrace and bathroom waterproofing before tiling in Delhi NCR apartments, builder floors and independent houses”},{“sector”:”Hospitality”,”detail”:”Balcony, sunken-slab and wet-area waterproofing in hotel and serviced-apartment renovations”},{“sector”:”Institutional / Infrastructure”,”detail”:”Overhead and underground potable water tank linings where CFTRI food-grade clearance is a specification requirement”},{“sector”:”Commercial / Leisure”,”detail”:”Swimming pool shell waterproofing beneath tile or plaster finish in clubs, resorts and residential complexes”},{“sector”:”Renovation & Retrofit”,”detail”:”Positive-side waterproofing over old masonry showing dampness, efflorescence or a failed prior coating”}],”faq”:[{“q”:”How is Ultra Block 2K different from an ordinary waterproofing paint?”,”a”:”A waterproofing paint is a single-component, vapour-permeable film brushed straight from the tin. Ultra Block 2K is a two-component cementitious slurry — powder mixed with liquid polymer on site — that builds a thicker, elastic, mechanically-bonded membrane rated to resist positive hydrostatic pressure, which is why it’s specified for tanks, pool shells and sunken slabs rather than just cosmetic damp-proofing.”},{“q”:”Is it safe to use inside my drinking water tank?”,”a”:”Yes — the manufacturer states it passes CFTRI Food Grade Certification, so it’s used for potable water tank linings. Space Arc still recommends a full 3-5 day cure and a clean-water rinse before the tank is filled for drinking use, and we’ll confirm the current certification status with Asian Paints at the time of your order.”},{“q”:”Do I need to tile over it, or can it stay exposed?”,”a”:”It cures to a matte grey film, not a decorative finish. On terraces and roofs it’s typically protected by a screed or China-mosaic/tile layer; in bathrooms and balconies it goes beneath the tile adhesive. Leaving it fully exposed long-term isn’t the intended use case.”},{“q”:”How soon can I tile or fill a tank after application?”,”a”:”The datasheet calls for 3-5 days of curing after the second coat before the surface is put into service, and if you’re overlaying a cementitious screed on brick, that goes on within 24-48 hours of the coating — don’t flood-test or pond water on it before the cure period is complete.”},{“q”:”What warranty backs this once Space Arc applies it?”,”a”:”Asian Paints extends a warranty of up to 5 years, varying by application area, when the product is installed as per its specification. As an authorised applicator, Space Arc documents surface prep, consumption and curing on every job so that warranty claim, if ever needed, isn’t contested on workmanship grounds.”},{“q”:”How much will I need for a 100 sq ft bathroom floor and walls?”,”a”:”At the stated ≥2 kg/m² minimum across 2 coats, 100 sq ft (about 9.3 m²) needs roughly 18-19 kg of mixed material — so two 12 kg packs, with some margin for absorbent surfaces. Space Arc’s site visit and the online budget calculator on the manufacturer’s page both give a more precise number once wall height and surface porosity are factored in.”}],”positioning”:”Within the Asian Paints SmartCare waterproofing range, Ultra Block 2K is the heavy-duty, hydrostatic-pressure-rated option — step up from SmartCare Damp Block 2K, which is the lighter-duty two-component coating Asian Paints positions for damp interior and exterior walls with a shorter 3-year warranty rather than tank- or pool-grade pressure resistance. For brick masonry jobs, Asian Paints’ own datasheet recommends pairing it with SmartCare Vitalia Neo as the integral waterproofing compound for the cementitious screed overlay, and Space Arc typically quotes the two together on terrace and balcony contracts. Outside the Asian Paints family, the closest genuine equivalent most specifiers reach for is Fosroc’s Brushbond FLXIII (commonly written into BOQs as Brushbond Flex) — also a two-component, polymer-modified cementitious flexible membrane for concrete and masonry, but built to a documented ~43% elongation and EN 1504-2 / WRAS certification trail. A specifier choosing between the two on a straightforward residential terrace or bathroom will usually default to Ultra Block 2K for cost and CFTRI food-grade suitability on tanks; one working to an export or institutional spec that explicitly calls out EN 1504-2 compliance, or needing the higher documented elongation for a wider crack-bridging margin, may prefer Brushbond FLXIII instead.”}

The technical insight

Ultra Block 2K sits in the acrylic-polymer-modified cementitious (PMC) coating category — a step up from plain cement slurries and single-component acrylic waterproof paints. The liquid polymer isn’t just a mixing convenience; it lowers the capillary porosity of the cured cement matrix and imparts genuine elastomeric behaviour, which is why the datasheet reports roughly 200% elongation at break against ASTM D 2370 rather than the single-digit figures typical of unmodified cementitious coatings. That elasticity, combined with a documented 1.3 MPa adhesion strength (ASTM D 7234) to cementitious substrates, is what lets a 1 mm-thick, two-coat film resist up to 5 bar of positive hydrostatic pressure per EN 12390-8 without needing a fabric reinforcement layer — relevant for tanks and pool shells where a torn or delaminated membrane is otherwise invisible until it leaks. The trade-off specifiers should understand is that all these figures are lab values measured at exactly 2 kg/m² consumption; under-dosing on porous or AAC-block substrates, or applying before the substrate reaches saturated-surface-dry condition, is the most common cause of site failures with this class of product.

Where it is used

• RCC terraces, roof slabs, parapets and sunshades ahead of tiling or exposed weathering
• Bathroom and toilet floors and walls beneath tile, including sunken (recessed) slab portions
• Balconies and utility decks exposed to standing or ponding water
• Swimming pool shells, as the structural waterproofing layer beneath the finish
• Overhead and underground water tanks and reservoirs, including potable-water applications
• Brick and block masonry showing rising damp, moisture staining or efflorescence
• External masonry facades where carbonation and moisture ingress threaten reinforcement
• Renovation retrofits over old, sound cementitious surfaces that have started leaking

Key advantages

• Resists up to 5 bar positive hydrostatic pressure — genuinely suited to submerged and water-retaining structures, not just splash zones
• High elongation (~200%) delivers real crack-bridging rather than a rigid, crack-prone film
• Seamless, jointless coat removes the lap-seam weak points inherent to sheet membranes
• Anti-efflorescence and anti-carbonation action protects both finish and underlying reinforcement
• CFTRI food-grade certification makes it usable on potable water tank linings
• Brush or roller application — no torching, hot-air welding or specialist membrane skills needed on site
• Water-based, lead/mercury/chromium-free formulation
• Backed by Asian Paints’ warranty of up to 5 years when installed per specification by an authorised applicator

Limitations & considerations

• A positive-side topical coating, not a substitute for injection grouting or waterstops at active construction/movement joints
• Performance is dose-dependent: under 2 kg/m² coverage, especially on porous or AAC-block surfaces, measurably weakens the barrier
• Demands a strictly saturated-surface-dry substrate and disciplined 3-5 day cure — flood-curing or premature ponding tests void performance
• Fresh concrete or masonry must be allowed to age 28 days before application, which can clash with tight construction schedules
• Supplied only in grey and only as a 12 kg pack, so larger jobs need multiple kits mixed to consistent 60:40 batches by hand
• Being a hand-mixed two-component system, achieved film thickness is operator-dependent unless site supervision enforces the coat/consumption discipline

Selection & best practice

Specifications

Industry use cases

How we position Asian Paints SmartCare SmartCare Ultra Block 2K

Within the Asian Paints SmartCare waterproofing range, Ultra Block 2K is the heavy-duty, hydrostatic-pressure-rated option — a step up from SmartCare Damp Block 2K, which Asian Paints positions as the lighter-duty two-component coating for damp interior and exterior walls, carrying a shorter 3-year warranty rather than tank- or pool-grade pressure resistance. For brick masonry jobs, Asian Paints’ own datasheet recommends pairing it with SmartCare Vitalia Neo as the integral waterproofing compound for the cementitious screed overlay, and Space Arc typically quotes the two together on terrace and balcony contracts. Outside the Asian Paints family, the closest genuine equivalent most specifiers reach for is Fosroc’s Brushbond FLXIII (commonly written into BOQs as Brushbond Flex) — also a two-component, polymer-modified cementitious flexible membrane for concrete and masonry, but built to a documented ~43% elongation and an EN 1504-2 / WRAS certification trail. A specifier on a straightforward residential terrace or bathroom will usually default to Ultra Block 2K for cost and its CFTRI food-grade suitability on tanks; one working to an export or institutional spec calling out EN 1504-2 compliance, or needing the wider crack-bridging margin, may prefer Brushbond FLXIII instead.

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