About STP ShaliFix SC 2K

STP ShaliFix SC 2K is built for the very specific problem of a concrete floor that has stopped performing at the surface. Years of forklift wheels, pallet drag, foot traffic and point loading leave the top few millimetres of a slab abraded, dusting and uneven, even while the structural concrete below is perfectly sound. Rather than break out and recast, ShaliFix SC 2K lets you correct only the running surface. It arrives as a 30 kg pre-weighed set: a grey cementitious powder (Component A) and a white polymer liquid (Component B) that are mixed on site in a fixed 25.5:4.5 ratio, removing the guesswork of hand-gauged polymer dosing.

The result after mixing is a trowellable mortar that lays down thin, typically around 3 mm, and cures into a dense, hard-wearing skin. Because the polymer is engineered into the system, the topping grips the parent concrete instead of sitting on it as a loose screed, and it can be textured with a broom while still green to give a deliberate anti-skid profile. That combination, thin-section correction plus a genuinely trafficable, skid-resistant finish, is what separates it from a general patching mortar or a cosmetic fairing coat, and it is why the product sits naturally in industrial flooring, logistics and pavement-refurbishment work.

The technical insight

The performance comes from polymer modification of an otherwise conventional cement mortar. The white liquid (Component B) carries a polymer that co-cures with the cement hydration, forming a continuous polymer film through the mortar matrix. That film does two things at once: it dramatically improves adhesion to the roughened, primed substrate, so the thin 3 mm layer behaves as part of the slab rather than a delaminating overlay, and it toughens the surface against abrasion and impact. The measured Taber abrasion loss (H22 wheel, 1000 cycles, ASTM D 4060) is only about 1.3 grams, and shear-bond adhesion exceeds 1.8 N/mm² (ASTM C 482), which is the number that actually keeps a thin topping stuck down under wheel loads. The cement fraction still supplies the compressive backbone, 33 to 38 MPa at 28 days, while the polymer contributes flexibility and water resistance so the thin skin tolerates the flexing and thermal movement a floor sees without micro-cracking. The mandatory cement/ShaliSBR Latex primer slurry is not optional detailing; it is the bond bridge that lets a millimetres-thin layer key mechanically and chemically into old concrete.

Where it is used

• Resurfacing worn, dusting or abraded concrete industrial and warehouse floors
• Surface correction of concrete pavements, driveways and bus bays
• Refinishing car-park decks, docks and loading bays subject to wheeled traffic
• Applying a wear- and skid-resistant topping over new concrete floors to upgrade the running surface
• Levelling and smoothing minor undulations before a floor is returned to service
• Restoring texture and grip on polished or slippery concrete trafficked areas
• Repairing localised worn patches on otherwise sound concrete slabs
• Preparing a sound, even surface on old concrete ahead of further floor treatment

Key advantages

• High abrasion resistance, with only ~1.3 g Taber loss over 1000 cycles, suited to trafficked floors
• Skid-resistant finish achievable by brooming the fresh topping to a chosen texture
• Strong bond to the concrete substrate, with shear-bond adhesion above 1.8 N/mm²
• Factory pre-packed 25.5:4.5 two-part kit removes on-site polymer-dosing errors
• Good waterproofing character from the polymer film within the mortar matrix
• Thin-section correction (around 3 mm) avoids the cost and downtime of slab replacement
• Sound compressive strength of 33 to 38 MPa at 28 days for industrial duty
• Proven UV weathering stability, with no cracking, softening or delamination after 1000 hours

Limitations & considerations

• It is a surface-correction topping, not a structural or deep-section repair mortar; deep or unsound areas must first be reinstated with ShaliFix MC 70
• Designed for thin lift (around 3 mm); it is not intended to build up large depths in a single pass
• Requires a mandatory cement/ShaliSBR Latex primer slurry, so it cannot simply be troweled onto bare, unprimed concrete
• The substrate must be sound, clean and mechanically roughened; smooth or contaminated surfaces will compromise the bond
• Dry curing is essential, and in hot, sunny or windy conditions the topping must be protected with polythene to prevent premature water loss
• Limited shelf life of six months in sealed packing, so stock must be rotated and used fresh

Selection & best practice

Specifications

Industry use cases

How we position STP ShaliFix SC 2K

ShaliFix SC 2K is the surface-finish stage of STP’s floor-repair system, and it works best alongside its own family. For the deeper or unsound concrete it deliberately does not handle, pair it with ShaliFix MC 70, which STP names as the reinstatement mortar to use before the topping goes down, and use ShaliSBR Latex as the bonding polymer in the mandatory primer slurry. Where the job is heavy structural reinstatement on columns, beams or facades rather than a floor surface, our Fosroc Renderoc range (Renderoc SF for vertical and overhead repairs, Renderoc S2 for corrosion-damaged patch repair) is the better technical fit, and Renderoc FC covers cosmetic fairing on non-trafficked surfaces. As authorised distributors and applicators for STP and Fosroc across Delhi NCR and Pan-India, we can specify the right combination and, where needed, apply it, so you are matching each product to the surface it is actually designed for rather than stretching one mortar across every defect.

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