Bal 20kg Flex One White Tile Adhesive

Name: Bal 20kg Flex One White Tile Adhesive
Brand: Bal
SKU: B066874
Price: 39.00 GBP
Availability: InStock

£39.00

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Special order item: 3-5 days

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Cement-based powder adhesive — requires mixing before use. Add approximately 5.4 litres of clean cold water per 20kg bag and mix mechanically. Need to grout the same day? See BAL Rapid-Flex One — grout after just 3 hours.

BAL Flex One is a standard-setting, highly polymer-modified S1 flexible tile adhesive for walls and floors — enhanced with BAL's FST (Fibre Strand Technology) for improved flexibility and bond strength. Its thixotropic, fluid formula with shape memory holds tiles firmly without slipping while remaining easy to work with, and its extended 45-minute open time and 2½-hour pot life make it well suited to large areas, intricate set-outs, and jobs where working time matters. Suitable for most natural stone including moisture-sensitive varieties, large format tiles up to 300×300mm and beyond on walls, swimming pools, underfloor heating, and virtually every substrate type — including timber floors via backer board. Backed by BAL's 25-year product guarantee.

Exceeds BS EN 12004 C2 TE S1

S1 flexible — highly polymer modified

FST — Fibre Strand Technology

Moisture-sensitive natural stone suitable

Swimming pools & showers

Underfloor heating compatible

Indoor & outdoor

25-year BAL guarantee

Pack size

20 kg

Type

Powder — mix with water

Classification

C2 TE S1

Colour

White

Pot life Extended
≈ 2½ hours

Open time Extended
>45 min

Grout after (20°C)

Min 16 hours

Setting time

6–8 hours

Bed thickness

2–15 mm

Water per bag

≈ 5.4 litres

App. temperature

+5°C to +35°C

Working temperature

-30°C to +100°C

Swimming pools

3 weeks after grouting

Showers

2 weeks after grouting

Shelf life

12 months

Guarantee 25 years
BAL product guarantee

Works with

Ceramic and porcelain tiles — all formats

Vitrified tiles and mosaics

Most natural stone including moisture-sensitive varieties

Terrazzo and brick slips

Rigid foam insulating materials

Large format wall tiles

Floors and walls, internal and external

Swimming pools and hydrotherapy pools

Wet rooms and showers (with BAL Tank-It waterproofing)

Underfloor heating — sand/cement screeds with BAL uncoupling mat

Timber floors — via backer board or BAL uncoupling mat

Anhydrite/calcium sulphate screeds (with BAL Prime APD)

Existing glazed tiles — with BAL Admix AD1

Uncalibrated stone — floors only

Not suitable for

Metal or painted floor surfaces — use BAL FlexBone 2Easy

Glass or metal tiles with water-sensitive coating on back

Direct tiling to timber or plywood walls and floors (use backer board or uncoupling mat)

Glazed tiles without BAL Admix AD1 modification

Bed thickness over 15mm — 15mm in localised areas (max 0.5m²) only

Plaster in commercial wet rooms or domestic power showers

Where same-day grouting is needed — use BAL Rapid-Flex One

Flex One vs Rapid-Flex One — which do you need?

BAL Flex One (this product)

2½ hour pot life — more working time

45-minute open time

Suitable for moisture-sensitive natural stone

Bed thickness up to 15mm (localised)

Grout after minimum 16 hours

BAL Rapid-Flex One

60-minute pot life — work in smaller batches

Not suitable for moisture-sensitive natural stone

Bed thickness up to 6mm typical (12mm localised)

Grout after just 3 hours

Ideal for renovation and fast-turnaround jobs

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

Preparation & mixing

Prepare the substrate. Surfaces must be flat (SR1), clean, dry, sound and free from contamination, dust, grease, and barriers to adhesion. Do not use below 5°C or in damp conditions.

Prime the substrate. Plaster and plasterboard: 2 coats BAL Prime APD undiluted (second coat at 90° to first), allow each coat to dry. Anhydrite screeds: mechanically abrade, then 2 coats BAL Prime APD — 1st coat 1:1 diluted, 2nd coat undiluted. Concrete/rendering: BAL Prime APD or BAL Bond SBR.

Plaster: max tile weight 20kg/m². Plasterboard: max 32kg/m².

Underfloor heating. For heated sand/cement screeds use in conjunction with a BAL uncoupling mat. For electrical undertile heating: modify with BAL Admix AD1 diluted 1:1 with water.

Check manufacturer compatibility before tiling over any heating system.

Mix. Add ≈ 5.4 litres of clean cold water to a BAL mixing bucket. Add powder gradually at approximately 3.5–4 parts powder to 1 part water by weight. Mix until lump-free. Allow to stand for 2 minutes then remix for 30 seconds. Use slow speed drill (under 300rpm).

Pot life ≈ 2½ hours at 20°C. Never add more water than recommended.

Wet areas. Waterproof with BAL Tank-It or BAL Waterproof 1C before tiling. For swimming pools the background must be fully watertight.

Fixing & finishing

Apply adhesive using a notched trowel, combing ribs in one direction. Bed thickness 2–8mm typical, up to 15mm in localised areas only (max 0.5m²).

Dry walls (up to 300×300mm): 6mm notch. Wet walls: 6mm solid bed. Floors/external: 10mm solid bed. Mosaics: 4mm notch. Large format (>600×600mm): 20mm notch.

Back-butter large format tiles and any heavily patterned tiles with a thin layer of adhesive to ensure solid bedding. For solid-bed applications leave no voids behind tiles.

Fix tiles before skin forms — typically within 45 minutes at 20°C. Press firmly with a slight twisting action. If skin has formed, remove adhesive and apply a fresh layer. Do not add water to adhesive that has started to set.

Discard any adhesive that has begun to set — do not rewet.

Movement joints. Install to BS 5385 Parts 1–5 at all perimeters, internal corners and regular intervals. Fill with BAL Micromax Silicone Sealant — not grout.

Grout. Wait minimum 16 hours at 20°C before grouting. Use BAL Micromax3 Eco Grout or BAL Absolute Grout. Clean surplus adhesive from tile faces before it dries.

Swimming pools: do not fill for at least 3 weeks after grouting. Showers: do not use for at least 2 weeks after grouting.

Downloads

Technical data sheet Safety data sheet Environmental Product Declaration Declaration of Performance