UltraTech Seal & Dry SBR
An SBR latex that bonds old concrete to new, toughens repair mortar and waterproofs wet areas from one 40% solids liquid.
What is it?
A styrene-butadiene rubber (SBR) copolymer latex — a white, water-based liquid with roughly 40% solid content — gauged into cement slurry, plaster, concrete or mortar, or brushed on as a standalone coat. It is the current-generation product in UltraTech’s original Seal & Dry waterproofing lineage, sold today inside the UltraTech Waterproofing Systems range simply as “SBR”.
Where is it used?
Bathroom, kitchen, terrace, chajja, sunken-slab and water-tank waterproofing; bonding coats between old and new concrete or plaster; and as a modifier in repair mortar and screeds across Delhi NCR and pan-India sites.
Why use it?
One drum covers bonding, mortar modification and waterproofing, so a site stocks fewer admixtures, and its film bridges hairline shrinkage cracks a plain cement slurry cannot.
How is it applied?
Brushed on as a 1:1 bonding slurry with cement, gauged into fresh mortar or concrete at 750 g to 3.5 kg per 50 kg cement, or diluted and brushed as a two-coat waterproofing coat.
About UltraTech Seal & Dry SBR
UltraTech Seal & Dry SBR is a styrene-butadiene rubber (SBR) copolymer latex from UltraTech’s building products range, supplied as a white, water-based liquid with a solid content of roughly 40% (plus or minus 1%) by weight. It earns shelf space on Indian sites by doing three jobs instead of one: brushed neat and gauged 1:1 with cement it becomes a bonding slurry between old and new concrete or plaster; dosed into fresh mortar, plaster or concrete it acts as a polymer modifier that improves cohesion and cuts cracking; and diluted and brushed in two coats it functions as a standalone waterproofing coat for bathrooms, kitchens, terraces, chajjas, sunken slabs and water tanks. That combination is usually the real reason it stays on the material list, rather than any one standout property.
Seal & Dry was UltraTech’s original branding for its total-waterproofing system, carried by the Aditya Birla Group cement major years before waterproofing systems became a standard line item on every cement company’s website. The product is listed on UltraTech’s current site simply as “SBR”, positioned inside the broader UltraTech Waterproofing Systems range alongside WP+200, BituPro, Flex, Hi-Flex, Top-Shield and Top-Shield EZY — but it is the direct descendant of the polymer-modified coating that carried the Seal & Dry name in UltraTech’s earlier Building Products literature, which is why dealers and site engineers across Delhi NCR still ask for it by the older name. It is manufactured by UltraTech Cement Ltd. (Aditya Birla Group) through its Building Products division. One caveat worth stating upfront: UltraTech’s public product page for this SKU carries less downloadable technical data than its dedicated Flex, Hi-Flex and Top-Shield pages, so pull the current batch TDS from your dealer before finalising dosage and quantities on a live order.
Space Arc Engineering supplies and applies UltraTech Seal & Dry SBR as an authorised UltraTech distributor and applicator across Delhi NCR and pan-India, so specifiers get product and site-level application support from one point of contact.
The technical insight
SBR latex works by coalescing into a continuous polymer film as the water in the emulsion evaporates and the cementitious matrix hydrates. That film bridges microcracks a plain cement slurry cannot, which is why bond coats made with it resist delamination better than neat cement-water slurry, and why mortar gauged with it shows better flexural strength and abrasion resistance than an unmodified mix. The same film gives the diluted, two-coat application its waterproofing character — a flexible, crack-bridging coating, not a membrane in the bituminous or sheet-applied sense. Because the latex is mildly alkaline and non-toxic, it also suits occupied buildings and drinking-water tank work where solvent-based systems are a harder sell. Even so, performance depends on substrate preparation and dosage discipline as much as on the product itself. Two effects run in parallel inside the mix: the latex plasticises an otherwise brittle, crack-prone cement paste, and it reduces capillary porosity, which is what gives the modified mortar its dampness resistance. That is standard behaviour for the whole family of SBR-modified cementitious systems used across Indian construction rather than a proprietary UltraTech mechanism, which is why competing SBR latexes — Fosroc’s Nitobond SBR being the best known — do a broadly similar job. It also marks the boundary of what the product can do: this is coating-and-admixture technology, not a crystalline or reactive-chemical waterproofing system, so the cured film cannot self-seal cracks that open in the substrate afterwards, and it is not engineered for negative-side or high-pressure water exposure. Where it earns its keep most clearly is bonding and repair, where better adhesion and reduced shrinkage cracking directly prevent the classic site failure of a repair patch or fresh plaster coat debonding within a monsoon or two.
Where it is used
- Waterproofing of bathrooms, kitchens, terraces and chajjas
- Water tank and sunken-slab waterproofing coats
- Bonding coat between old and new concrete or plaster
- Modifier for repair mortar on spalled RCC members
- Additive for plaster, screed and concrete overlays
- Crack-bridging slurry ahead of tiling or re-plastering
- Waterproofing mortar at bathroom and kitchen wall-floor junctions prone to hairline cracking
- Parapet walls and sunshades alongside terrace and chajja work
- Tile and stone bedding mortar additive to improve bond strength on vertical or overhead fixing
- Damp-proofing coat on internal walls showing rising or seepage dampness
- Internal rendering of sumps and water tanks on RCC rehabilitation work
Key advantages
- Covers bonding, mortar modification and waterproofing from one product, so fewer separate admixtures need to be stocked on site
- Roughly 40% solid content latex forms a continuous film that resists water ingress once cured
- Improves flexural strength and abrasion resistance of mortar it is gauged into
- Reduces shrinkage cracking in patch repairs and bond coats
- Non-toxic, non-flammable formulation that is easier to work with on occupied sites
- Pack sizes from 1 kg to 50 kg suit a single patch repair or a full terrace
- Single-component liquid — there is no on-site two-part mixing ratio to get wrong, unlike UltraTech’s own two-component Flex and Hi-Flex systems
- Brush or trowel applied with ordinary site tools; no specialised applicator equipment is needed
- Economical for small-format repair, plaster-modification and bonding work against the cost of specifying a dedicated PU or crystalline waterproofing system
- Sits under the same UltraTech umbrella as Flex, Hi-Flex and Top-Shield, so a specifier can standardise the whole waterproofing scope on one manufacturer
- Backed by UltraTech’s pan-India Building Products dealer network, so restocking and batch consistency are rarely an issue
Limitations & considerations
- Coverage and dosage figures are approximate and shift with substrate porosity and mix design — trial a patch before a full run
- Not a substitute for a dedicated membrane on structures under sustained hydrostatic pressure, such as basements below the water table
- Needs a clean, sound, saturated surface-dry substrate — bonding is unreliable on dusty, oily or actively wet surfaces
- The cured coat still needs a protective screed or tile layer where it sees continuous UV or foot traffic
- As a flexible polymer coating rather than a crystalline or reactive-chemical technology, it cannot self-heal cracks that open in the substrate after the film has cured
- Not engineered for negative-side water pressure — basements and retaining walls holding back groundwater need a dedicated membrane or crystalline system
- Dosage discipline cuts both ways: over-dosing the latex makes mortar gummy and hard to trowel, while under-dosing defeats the point of using it at all
- UltraTech’s public page for this SKU carries less downloadable technical data than its Flex, Hi-Flex and Top-Shield pages — confirm dosage, coverage and pack size against the current batch datasheet before pricing an order
- It is one line item within a broad Waterproofing Systems range rather than a standalone hero product, so it receives less dedicated technical literature than Flex, Hi-Flex or Top-Shield
Selection & best practice
Prepare the substrate to saturated surface-dry condition before applying the bonding slurry or waterproofing coat. Mix only what can be used inside the working time so the slurry does not skin over before the next layer goes on. For waterproofing, apply the diluted coat in two passes at right angles rather than one thick pass, letting each cure before the next. Check the current UltraTech technical data sheet for exact dosage against the specific cement and mix design, since ratios shift with grade, and protect the cured coat from traffic until it has developed adequate strength.
Surface preparation decides whether this product performs or fails. Grind or wire-brush the substrate to remove laitance, dust, oil and loose material, then saturate it with clean water without leaving standing puddles. Work the bonding slurry into the pores with a stiff brush and follow with the repair mortar or plaster while the primer coat is still tacky, not once it has dried out. Where it is used as an admixture rather than a primer, gauge it into the mixing water to the ratio on the current batch datasheet instead of eyeballing it. Protect fresh work from rain and direct hot sun for at least 24 hours, never apply over a surface with standing water or active seepage — the film needs a dry-enough substrate to key into — and on exposed terraces always follow with a protective screed or tile bedding rather than leaving the SBR coat as the final wearing surface.
Specifications
| Chemistry / base | Styrene-butadiene rubber (SBR) copolymer latex, water-based |
| Appearance | White liquid |
| Solid content | ~40% (±1%) by weight |
| pH | ~8–10 (mildly alkaline) |
| Bonding slurry mix ratio | 1:1 with cement by weight, brush-applied |
| Bonding coat coverage | ~45–48 sq ft per kg |
| Waterproofing coat coverage | ~100 sq ft per kg per mm thickness, 2 coats |
| Dosage in plaster | 750 g – 1 kg per 50 kg cement |
| Dosage in concrete | 1.5 – 2 kg per 50 kg cement |
| Dosage in mortar | 3 – 3.5 kg per 50 kg cement |
| Working / tack time | ~20–30 minutes |
| Pack sizes | 1 kg, 5 kg, 10 kg, 20 kg, 50 kg |
| Substrate condition required | Clean, sound, saturated surface-dry (SSD) |
| Component type | Single-component liquid latex (no two-part site mixing) |
| Primary function | Forms a dense, protective polymer layer that resists dampness (manufacturer description) |
| Secondary function | Bonding agent and cement-mortar / plaster modifier |
| Manufacturer | UltraTech Cement Ltd. (Aditya Birla Group), UltraTech Building Products division |
| Product range | UltraTech Waterproofing Systems |
| Range siblings | WP+200, BituPro, Flex, Hi-Flex, Top-Shield, Top-Shield EZY |
| Brand lineage | Current-generation product of UltraTech’s original Seal & Dry total-waterproofing system; listed on UltraTech’s current site as “SBR” |
Industry use cases
Residential
Bathroom, kitchen and balcony waterproofing before tiling in Delhi NCR homes, using the two-coat SBR coat under the screed.
Institutional & commercial
Repair of spalled RCC columns, beams and slabs, gauging Seal & Dry SBR into patch mortar for bond strength and reduced shrinkage.
Water-retaining structures
Internal waterproofing and rendering of overhead and underground tanks and sumps, where a non-toxic, brush-applied coat is preferred over sheet membranes. Where the tank feeds a domestic drinking-water line, confirm potable or food-grade suitability with UltraTech first.
Renovation & retrofit
Bonding fresh plaster, screed or concrete topping to old surfaces on renovation projects across Pan-India sites.
Plaster & render modification
Added to exterior cement plaster, particularly on repair patches, to improve crack resistance and adhesion to the old substrate.
Frequently asked questions
What is the difference between the bonding-coat and waterproofing-coat use?
How much should be dosed into concrete, plaster or mortar?
Is it safe to use inside a drinking-water tank or sump?
Does it replace a torch-applied or sheet waterproofing membrane?
Is UltraTech Seal & Dry SBR the same product UltraTech now lists simply as SBR?
Can it waterproof a basement or a retaining wall against groundwater?
How is it different from UltraTech Flex or Hi-Flex?
How soon can tiling or plaster go over an SBR-treated surface?
Can it be the whole waterproofing system on a new-build terrace?
How we position UltraTech Seal & Dry SBR
UltraTech Seal & Dry SBR sits in the general-purpose SBR latex category — what a contractor reaches for when a job needs bonding, mortar modification and light waterproofing without three separate chemicals. Where a project needs a documented, chloride-free bonding aid for a structural repair spec, or waterproofing under sustained hydrostatic pressure, a dedicated system is the better call; for routine bathroom, terrace and patch-repair work across Delhi NCR and pan-India, its all-in-one utility is what keeps it on the material list.
Within UltraTech’s own catalogue it sits one step below the dedicated terrace coatings: choose Flex or Hi-Flex when crack-bridging on an exposed terrace or wall is the primary job, Top-Shield or Top-Shield EZY when heat reflection matters as well, and reach for Seal & Dry SBR when the work is really about bonding, repair-mortar modification or general damp resistance rather than a standalone membrane. On Space Arc’s own catalogue it pairs naturally with UltraTech Crack Filler for patch-repair work and with UltraTech Readiplast Projekt or Tilefixo CT downstream of the bonding coat, letting a contractor stay on one brand from prep through finish on a repair or re-plastering scope.
Fosroc Nitobond SBR — A specifier who needs a documented, chloride-free bonding aid with a formal technical file for a reinforced-concrete repair specification might choose Nitobond SBR over a general-purpose latex like Seal & Dry SBR.
Related Concrete Repair products
Related Waterproofing products
Source UltraTech Seal & Dry SBR for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.