UltraTech Tilefixo NT
The polymer-modified adhesive built for large-format tiles, marble and granite — on floors, walls and everything in between.
What is it?
A single-component, polymer-modified, cement-based tile adhesive from UltraTech’s Building Products range, purpose-built for large-format tiles and natural stone rather than everyday ceramic work.
Where is it used?
Internal and external floors and walls over sound cementitious substrates — vitrified and porcelain flooring, granite and marble wall cladding, terraces and balconies, and tile-on-tile relaying during renovation.
Why use it?
It delivers markedly higher bond strength than a standard adhesive — 900-950 N dry and 700-800 N wet tensile adhesion at 28 days per IS 15477 — with genuine zero slip on vertical stone, so heavy granite or marble slabs stay put while the crew works the wall.
How is it applied?
Gauge with 25% water by weight (roughly 4 parts powder to 1 part water), mechanical-mix for 2-3 minutes, let it mature for 2 minutes, remix, then comb onto the prepared substrate with a notched trowel sized to the tile at a minimum 6 mm bed.
About UltraTech Tilefixo NT
UltraTech Tilefixo NT is a single-component, polymer-modified, cement-based tile adhesive — mix with water, no second component or hardener to weigh out — but the polymer loading is tuned for large-format tiles, marble, granite and other natural stone rather than everyday ceramic work, which is where standard-grade adhesives start to struggle once tile size and weight go up.
On site that shows up in three ways: dry and wet tensile adhesion of 900-950 N and 700-800 N at 28 days per IS 15477, comfortably ahead of a basic adhesive; zero measured slip at 40 kg per square metre, so a granite or marble panel doesn’t creep down a vertical wall while still green; and a workable 30-minute open time with a 1-hour pot life, enough for a mason to gauge a batch, spread it, and bed tiles before the surface skins over.
It’s built for cementitious backgrounds only — plaster, screed, concrete — not flexible boards, timber, metal, or moisture-sensitive stone; those need a different chemistry entirely.
The technical insight
The number worth watching is coverage, not pack size: about 2 square feet of tile per kilogram of powder at a 6 mm bed, roughly 40 square feet per 20 kg bag under normal conditions. That 6 mm is a minimum; undulating screeds or back-buttered oversized tiles eat into it fast, so budget bags on actual substrate flatness, not the headline figure. Compressive strength (10-12 N/mm² at 28 days) and bulk density (1450-1550 kg/m³) sit it in the high-performance bracket rather than an economy mix. One thing contractors often miss: open time doesn’t stretch in hot, windy weather — if anything it shortens — so on exposed terraces or in peak summer, work in smaller batches than the data sheet suggests.
Where it is used
- Vitrified and porcelain floor tiling in villas and apartment complexes, particularly where large-format tiles of 600×600 mm and above are specified and a standard adhesive’s open time isn’t enough.
- Granite, marble and natural-stone cladding on internal walls and building facades, where zero-slip performance keeps heavy panels from creeping before the adhesive sets.
- Exterior tiled areas exposed to weathering, within the product’s 5°C to 50°C application window.
- Relaying new tile directly over a sound, de-glazed existing floor, avoiding the cost and disruption of demolishing the old bed.
Key advantages
- High dry and wet tensile adhesion — 900-950 N and 700-800 N at 28 days per IS 15477 — for large or heavy tiles
- Zero measured vertical slip at 40 kg/m², so granite and marble panels stay in position while curing
- Single-component: gauge with water only, cutting site mixing errors
- No pre-wetting of tiles required before fixing
- Nil shrinkage and no wet-curing needed after application
- 1-hour pot life and 30-minute open time give a realistic working margin for large-format crews
Limitations & considerations
- Cementitious substrates only — not for fibre-cement sheet, plasterboard, timber, plywood, glass, metal or plastic backgrounds
- Not suitable for polyurethane-membraned surfaces or moisture-sensitive tiles and stone
- Application restricted to a 5°C-50°C ambient range; avoid extreme heat and wind
- Tiles must be pressed into place within 30 minutes of spreading, or bond strength drops
- Minimum 6 mm bed thickness — not designed as an ultra-thin-bed system
Selection & best practice
Strip oil, laitance, dust and bond inhibitors first, and use UltraTech Basekrete on walls or Floorkrete on floors to true up undulation before applying. Gauge only to the stated 25% water ratio — extra water to stretch pot life costs adhesion, not workability. Mix mechanically for 2-3 minutes, rest 2 minutes, remix. Comb it on with a notch sized to the tile; larger format or heavier stone needs a bigger notch and back-buttering. Tile vertical work bottom-up. For tile-on-tile jobs, strip the existing glaze first. Allow 24 hours before grouting or foot traffic, and store bags cool and dry — shelf life is 12 months from manufacture.
Specifications
| Chemistry | Polymer-modified, cement-based tile adhesive (single component) |
| Standards | IS 15477:2019; EN 1348 |
| Pack size | 20 kg bag |
| Mixing ratio | 4 parts powder : 1 part water (25% water by weight) |
| Pot life | 1 hour |
| Open time | 30 minutes |
| Adjustable time | 30 minutes |
| Minimum bed thickness | 6 mm |
| Coverage | ~2 sq.ft per kg at 6 mm bed (~40 sq.ft per 20 kg bag) |
| Compressive strength (28 days) | 10-12 N/mm² |
| Tensile adhesion strength, dry (28 days) | 900-950 N |
| Tensile adhesion strength, wet (28 days) | 700-800 N |
| Shear adhesion strength, dry (24 hr) | 5-6 kN |
| Shear adhesion strength, dry (14 days) | 10-11 kN |
| Shear adhesion strength, wet (28 days) | 6-7 kN |
| Shear adhesion strength, heat-aged (28 days) | 6-7 kN |
| Slip resistance | 0 mm at 40 kg/m² |
| Bulk density | 1450-1550 kg/m³ |
| Application temperature | 5°C to 50°C |
| Usage time post-application | 24 hours |
| Shelf life | 12 months from date of manufacture, stored cool and dry |
Industry use cases
Residential fit-out
A villa or apartment fit-out specifies Tilefixo NT for 800×800 mm vitrified floor tiles where a standard adhesive’s short open time was causing lippage across a large crew.
Facade & cladding consulting
A facade consultant recommends it for granite cladding panels on external walls, citing the zero-slip IS 15477 result as the deciding factor over a generic adhesive.
Renovation contracting
A renovation contractor relays porcelain tiles directly over an existing sound floor after mechanically de-glazing it, avoiding a full demolition-and-relay cycle.
Hospitality projects
A hospitality project fixes marble wall cladding and flooring with it, where wet-condition tensile adhesion matters in areas exposed to regular mopping.
Frequently asked questions
Can Tilefixo NT be used for small ceramic wall tiles, or is it overkill?
What tile sizes and types is it suitable for?
Does it need the tiles to be pre-wetted before fixing?
How long before grouting or foot traffic after tiling?
Can it be used to relay tiles over an existing tiled floor?
How we position UltraTech Tilefixo NT
Within Space Arc’s UltraTech tiling range, Tilefixo NT is the step-up choice for large-format and natural-stone work; specify it when tile size, weight or wall exposure pushes past what a standard-grade adhesive can reliably hold, and fall back to a general-purpose adhesive for routine small-format ceramic tiling.
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