UltraTech Weather Pro Top-Shield
A three-coat elastomeric acrylic system built to keep Delhi NCR terraces dry, cooler and crack-free through monsoon and peak summer alike.
What is it?
A single-component elastomeric acrylic coating applied in three colour-coded coats over a terrace, roof or parapet to form a seamless, crack-bridging waterproof film.
Where is it used?
Exposed RCC terraces, sloped roofs, Brick Bat Coba and IPS screed surfaces, parapet walls, chajjas, balconies and sit-outs across residential, commercial and institutional buildings.
Why use it?
It stops seepage at source, flexes across hairline cracks instead of splitting, and with a white top coat can meaningfully cool the roof surface, easing the summer heat load on the floor below.
How is it applied?
Brush or roller — a diluted self-priming coat followed by three undiluted coats laid over a 1 sq.m grid in alternating directions, each in a different shade so coverage can be checked visually as it goes on.
About UltraTech Weather Pro Top-Shield
UltraTech Weather Pro Top-Shield is UltraTech’s terrace waterproofing coating, built for the Indian roof — the kind that bakes under peak summer sun one month and sits under standing monsoon water the next. Rather than one thick membrane, it works as a deliberate three-coat build-up: each coat goes on in a different shade, typically terracotta as the base, grey through the middle and white on top, so a contractor or site engineer doing a walk-through can actually see whether the full system has gone on, rather than trusting a wet-film gauge or taking it on faith. On live sites that visual check is often what separates a roof that stays dry for years from one that starts leaking in its second monsoon.
Being a single-component product also removes a common site error: there’s no resin-to-hardener ratio to mix wrong on a hot afternoon. Open the pail, dilute the first coat by roughly 30% to use as a self-primer, then apply the remaining coats neat with a brush or roller. It’s formulated to go straight over sound, cured concrete, Brick Bat Coba or IPS screed — new or existing — without stripping the old surface and without a separate protection screed, both of which save real time and cost on a refurbishment job. For Delhi NCR’s older housing societies and independent floors, where the terrace is frequently on its second or third recoat, that’s usually the more realistic route than a full tear-out.
The technical insight
The coating’s value rests on two properties working together: elongation and adhesion. At 1mm dry film thickness it stretches past 300% before breaking and bridges cracks up to 2mm wide, which is generally enough to absorb the thermal movement and minor shrinkage cracking that RCC terraces develop as they expand and contract through the day. That flexibility only matters if the film stays stuck to the slab, which is where the pull-off bond strength — a minimum of 1.5 MPa to concrete — comes in; an elastomeric film that bridges cracks but peels at the edges isn’t much better than paint. Independent testing also backs the weathering claims: 1,000 hours of accelerated UV exposure without visible breakdown, and a hydrostatic test showing zero water penetration at 7 bar, a pressure well beyond what a ponded terrace ever actually generates but a useful safety margin for poorly drained roofs in a hard monsoon. The film stays breathable too, letting residual moisture vapour trapped in the slab escape upward instead of building up underneath and blistering the coating — a common failure mode with fully impermeable membranes laid over damp screed.
Where it is used
- Exposed RCC terraces and sloped roofs — residential, commercial and institutional
- Brick Bat Coba (BBC) and IPS screed terraces, new or existing
- Parapet walls, chajjas and sunshades
- Balconies and sit-outs that carry regular foot traffic
- Heat-reflective roof treatment using the white top coat
- Refurbishment of old terraces without removing the existing BBC or screed
Key advantages
- Bridges hairline cracks up to 2mm wide without needing a separate reinforcing fabric
- Colour-coded three-coat system gives visible on-site proof of full film coverage
- Applies directly over sound existing Brick Bat Coba or screed — no stripping, no protection screed
- White top coat can cut roof surface temperature by up to 10°C
- Single-component, brush or roller applied, with no mixing ratio to get wrong
- Breathable film lets residual vapour escape, reducing blistering risk
Limitations & considerations
- Not rated for expansion or other moving joints — these need a dedicated sealant instead
- Designed for foot traffic only, not vehicular or machinery movement
- Freshly laid screed or IPS needs 4-6 weeks of curing before coating can begin
- Application should be avoided if rain is expected within 48 hours
- Parapets and coping must also be treated, or the waterproofing stays incomplete
Selection & best practice
Get the substrate right before the first coat goes on — freshly cast screed or IPS needs four to six weeks of curing first, and rushing this is the single most common cause of early failure on site. Check the slope before starting; water that pools instead of draining will eventually find a way through even a sound coating, so fix ponding by resurfacing rather than expecting the coating to compensate for it. Provide at least one drain outlet per 50 sq.m and seal every pipe penetration and upstand corner with a polymer-modified mortar fillet before coating — these junctions, not the open field area, are where most terrace leaks actually start. Apply each coat over a 1 sq.m grid, working perpendicular to the previous coat, and allow 4-6 hours between coats. Don’t schedule the job if rain is expected within 48 hours, and always finish the parapets and coping too — a well-coated terrace with an untreated parapet still lets water in from the side.
Specifications
| Product Type | Single-component elastomeric acrylic terrace waterproofing coating, 3-coat system |
| Appearance | Viscous liquid |
| Solid Content (by weight) | 65 ± 2% |
| Tensile Strength @ 1mm DFT | Above 1.5 MPa (ASTM D412-2016) |
| Elongation at Break | Above 300% (ASTM D412-2016) |
| Crack Bridging | Up to 2 mm (EN 1062(A)-2004) |
| Water Permeability | Nil at 7 bar pressure (EN 12390-8:2019) |
| Pull-off Adhesion to Concrete | Min. 1.5 MPa (ASTM D7234-2022) |
| UV Resistance | Passes 1,000 hr accelerated weathering (ASTM G154:2023) |
| Surface Temperature Reduction | Up to 10°C with white top coat (ASTM D4803:2018) |
| Algae & Fungal Resistance | Passes (SS 5 Part G2-2003) |
| Dry Film Thickness | 900-1000 microns (3-coat build-up) |
| System Coverage | 1.5-1.6 L/sq.m (self-primer + 3 undiluted coats) |
| Primer Coat Rate | ~10 sq.m/L/coat (diluted 30%) |
| Base/Mid/Top Coat Rate | 0.4-0.5 L/sq.m/coat each, undiluted |
| Pack Sizes | 1 L, 4 L, 10 L, 20 L |
| Shades Available | White, Grey, Terracotta |
| Shelf Life | 36 months from manufacture, stored cool and dry |
Industry use cases
Residential terraces & independent floors
Recoating older, hairline-cracked terraces in Delhi NCR housing societies without stripping the existing Brick Bat Coba — a frequent ask on 15-20 year old buildings.
Commercial & institutional flat roofs
White top-coat application to reduce peak-summer roof surface temperature and ease the cooling load on the floor directly below.
New-build terraces at handover
First-time waterproofing on freshly cast screed or IPS, applied once the mandatory 4-6 week curing period is complete.
Parapets, chajjas & sit-outs
Extending the same coating system to vertical and semi-exposed elements so the whole terrace envelope is treated, not just the flat field.
Frequently asked questions
How many coats does UltraTech Weather Pro Top-Shield actually need?
Can it go over an existing terrace waterproofing layer?
Does it work on expansion joints?
How much material should we order for a given terrace area?
How long before the terrace can take foot traffic again?
How we position UltraTech Weather Pro Top-Shield
Weather Pro Top-Shield competes in the same bracket as Dr. Fixit Roofseal and Fosroc’s Brushbond Roofguard — all single-component, colour-coded, brush-applied acrylic systems built for the same terraces. UltraTech’s edge here is largely commercial reach: a wide dealer network and warranty backing make it an easy, readily-stocked default for most Delhi NCR sites, rather than a technically unique formulation.
Fosroc Brushbond Roofguard — Where a project is already standardising on Fosroc, or a specifier wants extra fibre reinforcement in the base coat, Brushbond Roofguard is a genuine like-for-like swap — it’s the same single-component, colour-coded, three-coat acrylic elastomeric approach aimed at the same terraces and roofs.
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