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Ultra Tile Fix 20kg ProFlex SP Rapid Set Flexible S1 Tile Adhesive

Name: Ultra Tile Fix 20kg ProFlex SP Rapid Set Flexible S1 Tile Adhesive
Brand: Ultra Tile Fix
SKU: B109688
Price: 21.60 GBP
Availability: InStock

£21.60 £24.00 10% OFF

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Colour | Grey

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Quantity

Cement-based powder adhesive — requires mixing before use. Mix with water on site. For the same S1 flexibility with a longer 2-hour pot life and more working time, see UltraTileFix ProFlex SPES.

Pot life is only 60 minutes at 20°C. Mix only what you can use within that time. Work in small batches and have everything prepared before mixing. In hot conditions pot life may be shorter.

Grey or white? Use the white version when fixing light-coloured natural stone, pale tiles, glass mosaics, or translucent tiles where grey adhesive may show through grout joints. Both variants have identical technical performance — the white version is slightly higher priced.

A single-part, rapid-setting, S1-classified flexible tile adhesive for walls and floors. Polymer-modified for enhanced adhesion, bond strength, and flexibility — suitable for areas where slight movement or vibration can occur. Sets in just 2.5 hours and can be grouted after 4 hours, making it the fast-track choice for renovation projects, commercial installations, or any job where returning an area to use quickly matters. Also suitable for quartz tiles — an advantage over the standard-set SPES. Bed thickness of 3–20mm accommodates uneven substrates.

EN 12004 C2FT S1

S1 flexible — rated for movement & vibration

Rapid set — grout after 4 hours

Underfloor heating rated

25-year guarantee

EPD certified

Pack size

20kg bag

Type

Powder — mix with water

Classification

C2FT S1

Colours

Grey & White

Pot life

60 mins

Set time rapid
2.5 hours

Grout after rapid
4 hours

Light foot traffic rapid
3 hours

Bed thickness

3–20mm

Coverage

4.5kg/m² at 3mm

App. temp.

+5°C to +25°C

Shelf life

12 months

Works with

All ceramic & porcelain tiles

Glass & mosaic tiles

Natural stone — marble, granite, limestone, slate, travertine, quarry, terracotta

Quartz tiles

Brick slips

Interior & exterior walls and floors

Wet rooms & communal showers

Swimming pools

Electric & piped underfloor heating

Timber floors (over backer board)

Anhydrite & calcium sulphate screeds

Tile on tile

Conservatories

Not suitable for

Resin-backed tiles

Direct tiling to plywood (use backer board)

Soft or composite vinyl floor tiles

Remixing or rewetting once started to set

ProFlex SP vs ProFlex SPES — rapid set or standard set?

ProFlex SP (this product)

Grout after just 4 hours

Light foot traffic after 3 hours

Suitable for quartz tiles

Grey or white — both available

60-minute pot life — work in small batches

ProFlex SPES

Grout after 18 hours

Light foot traffic after 18 hours

Not suitable for quartz tiles

Grey or white — both available

2-hour pot life — more working time

How to mix and apply this adhesive Priming · mixing · setting out · fixing · grouting

Preparation & mixing

Prepare the substrate — it must be clean, dry, firm, and stable, free from dust, dirt, oil, and grease. Vacuum thoroughly after any sanding or mechanical abrasion — do not wipe with a wet sponge as this spreads dust rather than removing it.

Prime with UltraTile ProPrimer before tiling. Porous substrates (plaster, plasterboard, screed, render): two coats — first coat diluted 1:3 with water, second coat 1:1. Allow 1 hour between coats. Non-porous substrates (tile on tile, DPMs, foil-faced boards): single neat coat.

For underfloor heating — commission and test the system fully before tiling. Set to a maximum of 15°C during tiling and for 7 days after installation. Then increase at 5°C per day.

Do not exceed 15°C during installation — higher temperatures can force-dry the adhesive and cause de-bonding.

Mix — add the powder slowly to 4.2–4.5 litres of clean water for a 20kg bag. Mix with a drill and paddle until smooth and slump-free. Pot life is 60 minutes at 20°C.

Only mix what you can use within 60 minutes. Do not remix or rewet material that has started to thicken or set.

Fixing & finishing

Apply adhesive in sections of 1m² at a time using a notched trowel. Bed thickness 3–20mm. Use the correct notch size:

Mosaics: 3×3mm at 6mm centres. Wall tiles: 5×5mm at 10mm centres. Floor tiles: 8×8mm at 16mm centres.

For floors and exterior applications use the solid bed method — apply adhesive to the floor and also butter the back of each tile. Press with a firm twisting action to achieve 100% contact.

Leave tile spacers and appropriate joint widths — 1–3mm for walls, 2–12mm for floors. Build in movement joints at all perimeters, internal corners, and at regular intervals across large areas.

Clean surplus adhesive from tile faces and grout lines with a clean damp cloth or sponge before it sets.

With a 2.5-hour set time, clean up promptly — do not leave surplus adhesive to harden on tile faces.

Allow a minimum of 4 hours before grouting. Light foot traffic is possible after 3 hours, depending on temperature and substrate. Always check the adhesive has set hard before grouting.

Use UltraTile ProGrout Smooth or ProGrout Flexible, available in a range of colours.

Downloads

All variants

Technical data sheet CE certificate

Grey variant

Grey safety data sheet Grey EPD certificate

White variant

White safety data sheet White EPD certificate