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Ardex X7R S1 Flexible Rapid Set Tile Adhesive

Name: Ardex X7R S1 Flexible Rapid Set Tile Adhesive
Brand: Ardex
SKU: B067004
Price: 35.99 GBP
Availability: InStock

£35.99

Tax included. Shipping calculated at checkout.

Special order item: 3-5 days

Colour | Grey - X7R S1

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Quantity

Cement-based powder adhesive — requires mixing before use. Add water on site and mix mechanically. Need more working time? See ARDEX X7 Standard Set — 5-hour pot life for large or complex installations.

Pot life is approximately 60 minutes at 20°C (45 minutes for slump-free wall consistency). Have tiles cut and everything prepared before mixing. Work in manageable batches. In warm conditions pot life will be shorter.

Grey or white? Choose white (X7 R S1 W) when fixing pale-coloured tiles, light natural stone, glass mosaics, or translucent materials where grey adhesive may show through grout joints. Both variants have identical technical performance and are priced the same.

ARDEX X7 R S1 is a rapid-setting, highly flexible S1 tile adhesive for walls and floors — incorporating fibre technology for improved adhesion strength, grab and non-slip characteristics. Classified C2F E S1 to BS EN 12004, it walks on and can be grouted after just 3 hours while still offering an extended 60-minute pot life and 30-minute open time — longer than most rapid-set adhesives. Suitable for all ceramic and porcelain tiles, glass and porcelain mosaics, terrazzo, natural stone (excluding moisture-sensitive varieties) and brick slips, in internal and external locations including swimming pools, underfloor heating systems and areas subject to limited movement and vibration.

BS EN 12004 C2F E S1

S1 flexible — deformable

Rapid set — grout after 3 hours

Fibre technology — improved strength & grab

Swimming pools suitable

Underfloor heating compatible

Indoor & outdoor

EPD certified

Pack size

20 kg

Type

Powder — mix with water

Classification

C2F E S1

Colours

Grey & White

Pot life (semi-pourable)

≈ 60 min

Pot life (slump-free)

≈ 45 min

Open time

30 min (fix within 20)

Grout & foot traffic Rapid
3 hours

Water per bag (floor)

Up to 5 litres

Water per bag (wall)

4–4.25 litres

Coverage

≈ 1.4 kg/m²/mm

App. temperature

Above +5°C

Early adhesion (24hr) Rapid
>0.5 N/mm²

Tensile adhesion All conditions
>1 N/mm²

Shelf life

12 months

Works with

Ceramic and porcelain tiles — all formats

Fully vitrified tiles

Glass and porcelain mosaics

Natural stone — excluding moisture-sensitive and translucent varieties

Terrazzo and brick slips

Floors and walls, internal and external

Swimming pools

Wet rooms and showers (with ARDEX WPC waterproofing)

Underfloor heating — concrete and cement/sand screeds with electric undertile mats

Timber floors — via backer board or ARDEX Flexbone uncoupling mat

Anhydrite/calcium sulphate screeds (with ARDEX P 51 primer)

Existing glazed tiles (with ARDEX P 82 or P 4 primer)

Installations subject to limited movement and vibration

Fast-turnaround renovation and commercial projects

Not suitable for / special conditions

Moisture-sensitive or translucent natural stone — use ARDEX S 27 W or S 28 W

Agglomerated stone tiles — use ARDEX S 27 W or S 28 W

Direct tiling to timber or plywood — use backer board or uncoupling mat

Gypsum plaster in wet or damp conditions

Plaster: max tile weight 20kg/m²

Plasterboard: max tile weight 32kg/m²

Large areas where remixing mid-job is impractical — consider ARDEX X7 Standard Set

X7 R S1 Rapid Set vs X7 Standard Set — which do you need?

ARDEX X7 R S1 Rapid Set (this product)

Grout and walk on after just 3 hours

Fibre technology — improved strength and grab

Ideal for renovation and fast-turnaround jobs

60-minute pot life — work in smaller batches

Not suitable for moisture-sensitive natural stone

ARDEX X7 Standard Set

Floor grout after 24 hours

5-hour pot life — maximum working time

High initial grab — ideal for heavy wall tiles

Wall grout after 8 hours

Suitable for non-moisture-sensitive natural stone

How to mix and apply this adhesive Surface prep · priming · mixing · fixing · grouting

Preparation & mixing

Prepare the substrate. Surfaces must be clean, firm, free of dust, dirt, oil, grease and barriers to adhesion. Backgrounds must be flat to SR1 — no gap greater than 3mm under a 2m straight edge. Do not use below 5°C.

Prime the substrate where required. Gypsum plaster: ARDEX P 51 diluted 1:3. Anhydrite screeds: sand and dry to ≤0.5% moisture, then ARDEX P 51 diluted 1:3 (or ARDEX R 3 E epoxy primer). Existing glazed tiles: ARDEX P 82 (internal dry) or ARDEX P 4 (internal/external). Smooth asphalt: ARDEX P 82 (internal dry only).

Wet areas and swimming pools. Apply ARDEX WPC Waterproof Coating before tiling in showers and wet areas. Backgrounds for swimming pools must be fully watertight.

Prepare everything before mixing. Have all tiles cut, spacers and tools ready before you open the bag. Once mixed you have 60 minutes (45 minutes for slump-free consistency).

Do not exceed the recommended maximum water per bag. Do not add water to adhesive that has begun to thicken.

Mix. Add powder to clean water whilst stirring. Floor tiling: up to 5 litres per 20kg bag. Wall/coving/skirting (slump-free): 4–4.25 litres per 20kg bag. Mix with ARDEX paddle at slow speed until lump-free.

Pot life ≈ 60 minutes at 20°C (45 min slump-free). Shorter in warm conditions.

Fixing & finishing

Apply adhesive with a trowel and comb through with a suitably sized notched trowel in straight ribs. Choose notch size based on tile size, surface and required coverage.

Fix tiles within 20 minutes of applying adhesive for optimum performance. Adjustment time approximately 20 minutes at 20°C.

Solid bed for floors, wet areas and external. Back-butter tiles immediately before placing into the ribbed bed to ensure no voids. For the semi-pourable mix, press with a twisting and sliding action. For the slump-free mix, back-buttering is usually required.

Fix tiles before skin forms. Press firmly with a twisting and sliding action to achieve required contact. Clean surplus adhesive from tile faces immediately — with a 3-hour set time it will be difficult to remove once hardened.

Clean up as you go — do not allow surplus adhesive to harden on tile faces.

Movement joints. Install to BS 5385 Parts 1–5 at all perimeters, internal corners and at regular intervals across large areas.

Grout. Allow 3 hours at 20°C before grouting and foot traffic. Use ARDEX-FLEX FL, ARDEX-FLEX FS or ARDEX EG 18 PLUS epoxy grout where chemical resistance is required.

Higher temperatures shorten, lower temperatures extend these times.

Downloads

Grey variant

Grey technical data sheet Grey EPD Grey safety data sheet

White variant

White technical data sheet White EPD