Decorative Granite-Look Epoxy Floor: on Concrete or over Existing Tiles

Solutions & Applications · Resin Flooring

A floor that performs like an industrial one and looks like a decorative one: continuous, jointless, with a glossy granite look, in just 2–3 mm. And most useful of all for renovation — it can be laid over the existing tiles, without demolition, without debris, raising the floor level by about 2 mm.

What SINROC DECO is

SINROC DECO FLOORING by SINTECNO is a coloured, two-component, self-levelling epoxy resin mortar, glossy and solvent-free. The coloured natural aggregates are already in the mix: the granite look comes from the material itself, with no broadcast and no second coat.

Property	Value
Layer thickness	2–3 mm · consumption ~1.7 kg/m² per mm (~3.4 kg/m² at 2 mm)
Hardness	Shore D 82 ± 2 (7 days, +23 °C)
Adhesion to dry concrete	> 1.5 N/mm², with failure in the concrete
Chemical resistance	Mild acids, mineral oils, petrol, fresh and sea water, alcohols, salt solutions, alkalis
Service temperature	−10 to +70 °C
Pot life · curing	~30 minutes at +20 °C · walkable after 24 hours · full cure in 7 days
Colours	4: dark grey, light grey, red, blue — the colour comes from the aggregates
Use	Interior spaces · 15 kg kit (A+B)

Coating, industrial or decorative?

In resin flooring, "epoxy" covers very different things. The choice starts with what the floor has to do — not with its colour:

System	What it is	Where it fits
SINMAST RM 22 · RM 32	Protective epoxy coatings, thin film	Storage, food areas, low-cost concrete protection
SINROC 22 Flooring	Self-levelling epoxy 1–2 or 3–4 mm, RAL greys, slip-resistant with sand broadcast	Industry, forklifts, ramps, wet zones
SINROC DECO Flooring	Self-levelling epoxy 2–3 mm with granite look, glossy	Shops, receptions, offices, showrooms, schools, residential kitchens
SINROC 42 SL Flooring	Self-levelling polyurethane, permanently elastic, Bfl-s1	Spaces with vibration, thermal shock or a fire requirement · decorative chips

Compared with an epoxy coating, the 2–3 mm thickness of SINROC DECO hides minor substrate imperfections, and the granite pattern does not show dust and the marks of daily use — the difference that makes a resin floor acceptable in a space open to the public.

Two substrates, two systems

The same finish is laid on two very different bases. Preparation and primer change completely:

Parameter	Concrete or cement screed	Existing tiles
Base requirements	≥ 28 days, ≥ 22 MPa, tensile ≥ 1.5 MPa, moisture ≤ 4 %	Well-bonded tiles, no hollow spots, completely dry — surface moisture < 5 %
Mechanical preparation	Milling or closed-circuit shot blasting	Joints filled flush with the tiles, glaze sanded until uniformly dull
Local repairs	SINMAST P 103 or S2 with quartz sand, 24 hours before	Hollow tiles removed, gaps filled flush with repair mortar
Primer	SINMAST S2 or S2 F, 0.250–0.300 kg/m² · on damp substrates SINMAST S2 Wet on Wet	SINTECNO TILE PRIMER, 50–80 g/m², applied with a soaked cloth
Overcoating window	12–24 hours	15 minutes to 1 hour

Application over existing tiles

Renovation without demolition is the most frequently requested application — in residential kitchens, shops and offices with old tiles. The sequence is strict:

1. Tile check: tap the whole surface; tiles that sound hollow or move are removed and their place is filled flush.
2. Joints: cleaned and filled exactly flush with the tile. In a 2 mm layer, a recessed joint will "telegraph" through to the finished surface.
3. Sanding: mechanically, until the glaze is uniformly dull and rough — paying particular attention to corners, perimeters and under units.
4. Cleaning: industrial vacuum, not sweeping. No dust, grease, wax or cleaner residue — in a kitchen, especially near the hob.
5. TILE PRIMER: with a soaked lint-free cloth, as if cleaning the surface, changing the cloth often. 50–80 g/m², undiluted.
6. Mixing: A : B = 91 : 9 by weight, pre-weighed. Mixer at 300–400 rpm for ~3 minutes. Not thinned; no aggregates or pigments added.
7. Laying: notched trowel or adjustable "butterfly" spreader at 2 mm (~3.4 kg/m²), immediately followed by a spiked roller in a cross pattern. "Wet on wet" from kit to kit, so that no seams remain.
8. Curing: no access for 24 hours, then careful foot traffic; furniture, appliances and wet cleaning after 7 days.

Choosing the design

The colour does not come from a pigment but from the coloured natural aggregates in the mix. That is why SINROC DECO is not produced in custom RAL shades — the choice is made from the four designs:

Design	Character	When we recommend it
Dark grey	Deep, neutral	Intensive use; hides stains and marks best; works with wood and stainless steel
Light grey	Bright, minimalist	Small or dark spaces, light-coloured furniture, open-plan spaces
Red	Warm, bold	When the floor is the statement element, with neutral furniture around it
Blue	Cool, distinctive	White spaces, holiday homes, combined with natural wood

• Sample before ordering: screens distort tones; the design is judged on the sample, in the light of the space.
• One design per surface: zones in two designs need a dividing profile and laying in two phases.
• One batch: the whole quantity is ordered together, so the tone does not vary between kits.

Application conditions & quantities

Parameter	Requirement
Substrate & air temperature	+8 to +30 °C and at least 3 °C above the dew point
Relative air humidity	≤ 75 % for SINROC DECO, < 70 % when primed with TILE PRIMER · ideally < 60 %
First 24 hours	Protection from water, moisture and dust · good ventilation without draughts
SINROC DECO consumption	~3.4 kg/m² at 2 mm · ~5.1 kg/m² at 3 mm
Number of 15 kg kits	m² × 3.4 ÷ 15, rounded up, +5 % for losses
TILE PRIMER	0.75 kg tin ≈ 9–15 m² · 3 kg tin ≈ 37–60 m²

As a guide, at 2 mm: 10 m² → 3 kits · 15 m² → 4 kits · 20 m² → 5 kits. One 15 kg kit covers about 4.4 m² — the crew is organised so that each kit is laid continuously.

Where it fits — and where it does not

Space	Suitability
Shops, receptions, showrooms	Yes — a uniform image, resistance to abrasion and point loads
Offices, schools	Yes — easy cleaning, a look that does not show dust
Residential kitchens	Yes — continuous, impermeable, oil-resistant, over the existing tiles
Commercial kitchens, showers, wet areas with falls	Not as a first choice — the surface is glossy and the product page gives no slip-resistance value · SINROC 22 with sand broadcast is recommended there
Exterior spaces	No — the material is for interior use

Maintenance is simple: felt pads under furniture and appliance feet, cleaning with a neutral detergent — not with solvents, bleach or abrasive sponges.

Design sequence

1. Substrate: concrete or tiles — this determines preparation and primer.
2. Moisture check: ≤ 4 % in concrete, < 5 % at the tile surface, with no trapped moisture.
3. Use of the space: a dry space for DECO, a wet zone for SINROC 22 with broadcast.
4. Design: sample in the space, one design per surface, one batch.
5. Levels: doors, appliances, transitions to adjacent floors.
6. Crew organisation: priming by section, laying "wet on wet", quantities per kit.

The System

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