About UltraTech Floorkrete HS2

Most floor screeding failures on Indian sites don’t come from a bad concrete slab underneath — they come from the screed itself: hand-batched sand-cement mixed by eye, water dosed by feel, and proportions that vary from one mason’s trowel-load to the next. That’s the gap UltraTech Floorkrete HS2 is built to close. It’s a factory pre-mixed, polymer-modified cement mortar — you add only water on site — formulated specifically for floor screed applications and complying with IS 2250. Instead of hoping a site mix holds its strength and doesn’t hollow out under tile, you’re working with a consistent, quality-controlled product from batch to batch.

HS2 is one of three variants in UltraTech’s Floorkrete range (alongside HS1 and HS3), positioned as a mid-range, general-purpose screed mortar for terraces, floors and underlayment work rather than a specialist heavy-duty or rapid-set formulation. On a typical Delhi NCR project, that means it shows up doing the unglamorous but critical job of getting a terrace level and fall-correct before waterproofing and tiling go down, or squaring up an RCC slab before vitrified tile or an epoxy floor system is laid over it. As an UltraTech authorised distributor and applicator, Space Arc supplies and applies Floorkrete HS2 as part of the same waterproofing-to-flooring sequence — so the screed, the membrane underneath it, and the tile adhesive or coating above it can come from one accountable source rather than three separate suppliers pointing fingers at each other if something goes wrong.

The technical insight

Floorkrete HS2 sits in the same family as most polymer-modified screed mortars: ordinary Portland cement, graded sand/fillers, and a redispersible polymer powder that does two jobs a plain 1:4 or 1:6 site-mixed sand-cement screed can’t — it improves bond to the substrate (critical when the screed is sandwiched between a waterproofing membrane and a tile bed) and it reduces the micro-cracking that shows up later as hollow-sounding tiles or dusting terraces. The IS 2250 reference on the datasheet is the standard for plastering and floor finishing mortars generally, not a strength-grade certification specific to HS2, so treat it as a formulation-compliance marker rather than a performance guarantee. The genuinely useful engineering detail is the aggregate-extension option: cutting the neat mortar 1:1 by weight with 10 mm down graded aggregate for thicker or larger pours is not a shortcut — it’s the manufacturer’s own recommendation, and it deliberately trades strength (30-35 N/mm² neat, down to 15-20 N/mm² extended) for lower shrinkage risk and better economics in thick sections, which is exactly the right call for a 40 mm terrace screed versus a 15 mm tile underlayment. On coverage: the datasheet states 0.40 sq ft per kg at 12 mm, which works out to roughly 27 kg of dry mortar per m² at that thickness (about 2.2 kg/m² for every additional millimetre) — so a 40 kg bag covers close to 1.5 m² at 12 mm but drops to under 0.5 m² if you’re screeding a full 40 mm terrace fall. Budget bag quantities off that ratio, not off a flat per-bag-per-square-metre rule of thumb, because the spread changes a lot across the product’s thickness range.

Where it is used

• Final-level terrace screed laid over waterproofing coatings before tiling or coping
• Levelling underlayment beneath ceramic, vitrified tile, or natural stone adhesive systems
• Base screed preparing an even substrate ahead of epoxy or PU industrial flooring systems
• Warehouse, garage and workshop floor topping in dry, non-chemical-exposure areas
• Residential and office building floor screeding to correct slab level variations
• Parking area and podium deck screeding ahead of waterproofing and finish layers
• Commercial and public-building floor levelling where trade handover timelines matter
• Patch-levelling of uneven RCC floor slabs before any finish flooring is laid

Key advantages

• Pre-mixed and polymer-modified — no on-site sand/cement proportioning errors that plague hand-batched screeds
• 30-35 N/mm² compressive strength at 28 days comfortably handles foot, light-vehicular and racking loads
• Aggregate extension option (1:1 with 10 mm down graded aggregate) lets one product economically span thin tile underlays to thick terrace falls
• One-hour pot life is workable for a trained crew without rushing or wasting mixed material
• Ready for tiling, waterproofing or coating trades in as little as 48 hours under normal conditions
• Polymer content improves adhesion to the substrate and reduces the shrinkage cracking common in plain screeds
• IS 2250-compliant formulation gives specifiers and PMCs a documented basis for approval
• Well-graded fillers and 12-month shelf life reduce on-site material wastage versus loose sand-cement stock

Limitations & considerations

• It is a screed/underlayment, not a wearing surface — still needs tiling, a hardener, or an epoxy/PU topcoat for the final finish
• Not a chemical-resistant or decorative flooring system; for exposed industrial wear surfaces you still need a resin topping over it
• Application is temperature-bound (5-50°C) and curing has to be extended well beyond the normal 2-3 days if site temperatures sit below 20°C
• Substrate prep is non-negotiable — defects deeper than 40 mm need patching first, and the surface must be roughened for adhesion, which is easy to skip on a rushed site
• A 1-hour pot life means batch sizes have to be matched to placement speed; over-mixing ahead of the crew wastes material
• Sold only in 40 kg bags, which is inefficient for small patch or touch-up jobs measured in a few kilos

Selection & best practice

Specifications

Industry use cases

How we position UltraTech Floorkrete HS2

Floorkrete HS2 sits alongside HS1 and HS3 in UltraTech’s own screed range, and within the wider UltraTech Building Products line-up — AAC blocks, tile adhesives, waterproofing coatings, and grouts & anchors — that Space Arc also distributes, so a single UltraTech order can usually cover the waterproofing-to-tiling sequence end to end. As a straight cementitious floor screed, its closest market alternatives are other polymer-modified mortar systems such as MC-Bauchemie’s MC-Floor Screed range or Sika’s CemCrete and EpoCem screeds, all in the same broad price and performance band. Fosroc is genuinely relevant to this job, but at the next stage rather than as a swap-in: Fosroc’s Indian flooring catalogue (the Nitoflor range) is built almost entirely around epoxy and PU resin systems — self-smoothing toppings, chemical-resistant coatings, terrazzo finishes — rather than a like-for-like cementitious screed, so there isn’t a clean one-to-one Fosroc replacement for Floorkrete HS2 itself. Where Fosroc does come in is as the wearing layer laid over a screed like this one, on projects that need a chemical- or abrasion-resistant industrial floor finish rather than a tiled or plain trowelled surface.

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