About UltraTech Floorkrete HS1

UltraTech Floorkrete HS1 is the top-strength member of UltraTech Building Products’ three-tier Floorkrete screed range (HS1/HS2/HS3), pitched at an M60 design grade against HS2’s mid-tier M40 and HS3’s lighter M20. It’s a factory pre-mixed, polymer-modified cementitious mortar — graded sand, cement and a redispersible polymer already proportioned in the bag — so a site crew just adds water and mixes. That consistency matters on the floors HS1 is meant for: warehouse aisles under forklift loads, factory shop floors, ramps and parking decks, where loosely site-batched screed tends to show soft patches and dusting within a monsoon season.

HS1 rarely stands alone as a finished floor. It’s usually the structural levelling and strengthening layer under an epoxy or PU topcoat, under vinyl or tile, or under an anti-static system in an electronics or pharma plant — the layer that carries the load so the finish above doesn’t crack. For NCR clients, the real first question is often whether the actual traffic on that floor needs HS1’s extra strength margin or whether the mid-tier HS2 covers it. As UltraTech’s authorised distributor and applicator, Space Arc supplies HS1 with the mix design, curing supervision and, where needed, the topcoat system over it — not just the bag.

The technical insight

The “HS” stands for high-strength, and the polymer modification is what gets it there. Redispersible polymer powder in the dry mix forms a film around the cement hydrates as the screed cures, which lifts bond strength to the base slab well past the 0.3-0.5 N/mm² typical of an unmodified sand-cement screed, and adds flexural toughness so the top few millimetres don’t crumble under a loaded pallet-truck wheel. UltraTech’s data sheet allows extending the mix with 10mm-down aggregate at 1:1 by weight for thicker single-layer pours — useful on ramps and large bays where going past 40mm in one lift would otherwise mean a second layer, though it trades some topline strength for pour economy. The 1-hour pot life and 48-hour minimum cure before loading are the numbers site supervisors plan around; both stretch out below 20°C, which matters for early-morning winter pours in Delhi.

Where it is used

• Warehouse and 3PL floor screeding under forklift and pallet-truck traffic
• Factory shop-floor resurfacing ahead of an epoxy or PU coating system
• Loading bay, dock and ramp resurfacing
• Structural underlayment beneath anti-static/ESD flooring in electronics or pharma plants
• Basement and multi-level parking deck relevelling
• Terrace/podium screed over waterproofing where the deck also takes vehicular or heavy foot load
• Commercial floor reprofiling ahead of vitrified tile or stone laying
• Precast/RCC slab levelling before final flooring in institutional buildings

Key advantages

• M60 design grade — the strongest of the three Floorkrete tiers, built for genuinely heavy trafficked floors
• Factory pre-mixed, so sand grading and cement-polymer dosage don’t vary bag to bag the way site-batched screed does
• Polymer modification lifts bond strength to the substrate, cutting delamination risk under coatings
• Coarse-aggregate extension option (1:1 by weight) makes thicker single-layer pours more economical
• A workable 1-hour pot life that suits real site crews without forcing a rushed pour
• Finishes with a spatula, aluminium float or power trowel — no specialist plant needed
• Technical parameters comply with IS 2250, so the spec is auditable rather than a private claim
• Backed by UltraTech’s technical service cell and Space Arc’s own application crew for mix design and curing supervision

Limitations & considerations

• Not a wearing surface by itself in chemically aggressive plants — oil, acid or solvent exposure still needs a resin topcoat over it
• 48-hour minimum before subsequent trades or traffic, longer below 20°C, so it can’t be a same-day-handover floor
• Application is capped between 5°C and 50°C ambient, a factor on both peak Delhi summers and cold winter mornings
• Beyond about 40mm in a single layer it needs the aggregate-extended mix, which slightly trades away topline strength
• It’s the costliest Floorkrete grade — specifying HS1 where the floor will only ever see HS2-level traffic is wasted spend
• Surface prep tolerance is limited; defects deeper than 40mm need patching first, so a poorly cast base slab adds cost before HS1 goes down

Selection & best practice

Specifications

Industry use cases

How we position UltraTech Floorkrete HS1

Within UltraTech’s range, HS1 sits above Floorkrete HS2 and HS3 — same system, different design grade — so the honest first question on any enquiry is which grade the actual traffic load calls for, not defaulting to the strongest one. It pairs naturally with other UltraTech Building Products Space Arc carries: Seal & Dry waterproofing underneath a terrace pour, Tilefixo and Tilefixo Grout above it if the finish is tile, and Basekrete or Microkrete where the base slab itself needs repair before screeding. Outside UltraTech, Fosroc’s Nitoflor Levelcrete is the closer comparison — a self-levelling cementitious compound rated to a similar 40 N/mm² 28-day strength, but self-levelled rather than trowelled to a fall. A specifier might reach for Levelcrete on a large, genuinely flat warehouse floor where cutting manual trowelling labour matters more than controlling a fall, while HS1 stays the better fit wherever the floor needs a worked-in gradient — ramps, drains, terraces — or where the aggregate extension is needed to make up a thicker level difference economically.

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