Grade 03 · Heavy-duty
ST3 Diamond
Higher bond strength for large-format tiles and busy floors.
Type 3 · IS 15477:2019
Slip resistant · TDeformability S1
20 kg bag
1.71Tensile adhesion, N/mm²
1.87Shear adhesion, N/mm²
25 minOpen time
30 minAdjustment time
≈ 5.0 LWater per bag
About ST3 Diamond
Large-format tiles and higher-traffic floors
Formulated for higher bonding strength. ST3 Diamond is built for larger tiles and higher-traffic areas, holding firm under the extra weight and wear.
Ideal applications
- Large-format tiles
- Higher-traffic floors: showrooms, offices, lobbies
- Heavier floor and wall tiles
- Internal applications
Key features
- Non-slip grip. Holds tiles in place on application, so they don't creep or slide before the bond sets.
- Crack resistant. Formulated to keep tiles from cracking as the surface settles over time.
- No hollow sound. A solid, even bed underneath. No hollow patches, no weak spots.
- Floor & wall. One adhesive family for internal floor and wall tiling.
Technical data
Test results
Independent lab report to IS 15477:2019, dated 18 Aug 2026.
| Property | Result | IS 15477 requirement | Method |
|---|---|---|---|
| Classification | Type 3 adhesive | Type 1–5 | Clause 4 |
| Tensile adhesion, dry | 1.71 N/mm² | ≥ 1.5 N/mm² | Annex A |
| Tensile adhesion, wet | 1.38 N/mm² | ≥ 1.0 N/mm² | Annex A |
| Shear adhesion, dry | 1.87 N/mm² | ≥ 1.5 N/mm² | Annex B |
| Shear adhesion, heat-aged | 1.63 N/mm² | ≥ 1.0 N/mm² | Annex B |
| Shear adhesion, wet | 1.46 N/mm² | ≥ 1.0 N/mm² | Annex B |
| Open time | 25 min | ≥ 15 min (declared) | Annex C |
| Adjustment time | 30 min | ≥ 20 min (declared) | Annex D |
| Slip (vertical) | 0.19 mm · T | ≤ 0.5 mm | Annex E |
| Deformability | 3.33 mm · S1 | ≥ 2.5 and < 5.0 mm | Annex F |
| Water ratio | 250 ml/kg | ≈ 5.0 L per 20 kg bag | — |
| Pack size | 20 kg | — | — |
| Shelf life | 12 months | Unopened bag, stored dry | — |
How to use
Six steps, printed on every bag
1
Clean the surface
The base must be firm, level and free of dust, oil, paint and loose material. Dampen very dry, absorbent surfaces and wipe away standing water.
2
Measure the water
For ST3 Diamond: 250 ml per kg, about 5.0 litres per 20 kg bag.
3
Pour the adhesive
Add the powder to the water, not the other way round, while mixing.
4
Wait
Let the mix stand for about 5 minutes so the additives activate.
5
Stir
Re-mix to a smooth, lump-free paste, ideally with a drill and paddle at low speed. Do not add more water later.
6
Apply
Spread with a notched trowel, comb in straight lines, place the tile and press with a slight twist. Adjust within the adjustment time and grout after 24 hours.
Other grades
Compare the range
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