11
20kg Ardex X18 pink bag - Superior fibre reinforced wall & floor tile adhesive for pools & wet areas
20kg Ardex X18 pink bag - Superior fibre reinforced wall & floor tile adhesive for pools & wet areas

ARDEX X 18 Tile Adhesive

A fibre-reinforced, flexible tile adhesive for demanding wall and floor tiling, including swimming pools and commercial wet areas. Non-slump handling with extended open time.

Vendor: Ardex
SKU: ARDX18WH/20
Availability: Out Of Stock
$52.50
$52.50
Prices do not include GST

Special order

This item is supplied to order and is not confirmed as in stock at any store. For availability before visiting, email contact@adheseal.com.au.

Guaranteed safe checkout
  • Apple Pay
  • Google Pay
  • Mastercard
  • Shop Pay
  • Visa
  • Secure SSL encrypted checkout
  • Fast, tracked shipping
  • Easy returns & support
Shipping & Delivery

Flat-rate shipping $17.95 + GST (metro and standard zones). Excludes remote/regional/high-cost postcodes and certain items (DG, oversized, long-length, or bagged products 15 kg+). If your order includes any of these, we will contact you to arrange additional freight charges. Online purchases only.

Download Product Data

Download TDS Download SDS Download Ardex X 18 Tile Adhesive VOC Certificate
Description  

ARDEX X 18 is a fibre-reinforced, flexible, non-slump wall and floor tile adhesive for demanding residential and commercial tiling. Compared with general-purpose adhesives, X 18 is positioned for higher-demand work including swimming pools, wet areas, commercial floors and installations using large or heavy tiles.

Compare tile adhesives: See our complete tile adhesive range from ARDEX, Gripset, Mapei and RLA to compare flexibility, setting speed, wet-area suitability and tile/substrate requirements.

Best for

  • Swimming pools and immersed tiling systems
  • Commercial and residential wall and floor tiling
  • Large-format and heavy tiles
  • Porcelain, fully vitrified and ceramic tiles, mosaics and stable natural stone
  • Wet areas and compatible ARDEX waterproofing membranes

Why choose ARDEX X 18?

  • Fibre reinforced: specially developed fibres add strength to the tiled assembly.
  • Non-slump: supports large and heavy tiles on walls and floors during installation.
  • Flexible with extended open time: provides practical working time and movement accommodation for demanding applications.
  • Commercial and pool capable: ARDEX approves X 18 for internal and external work including swimming pools.
  • Low-sand workability: designed for a creamy, installer-friendly consistency.

Tile and substrate compatibility

ARDEX X 18 suits porcelain, fully vitrified and ceramic tiles, concrete stone tiles such as terrazzo, glass and porcelain mosaics and non-moisture-sensitive natural stone. Compatible substrates include concrete, renders, screeds, fibre-cement sheet, plasterboard on walls, compressed fibre-cement sheet on floors, Ceramic Tile Underlay and ARDEX liquid-applied undertile waterproofing membranes.

Coverage

Approximate supplier coverage is 11m² per 20kg on walls and 7m² per 20kg on floors, depending on substrate condition, trowel size and tile profile.

Important limitations

Moisture-sensitive natural stone requires a dedicated ARDEX natural-stone system. Existing tile substrates require correct mechanical preparation and are not automatically suitable for every immersed application. Always follow the current ARDEX technical data sheet and AS 3958.

ARDEX system products: For compatible substrate preparation and finishing, see ARDEX Multiprime and ARDEX FG8 Tile Grout. Always match primers, membranes and grouts to the current ARDEX system specification for the job.

Common Questions  

What classification does ARDEX X 18 have?
It is classified C2TES1 to ISO 13007.

Can X 18 be used in swimming pools?
Yes, on suitable prepared pool substrates and systems.

How long is the open time?
About 30 minutes at 23°C.

When can it be grouted?
Typically after about 24 hours at 23°C, with longer drying in cold, humid or low-porosity conditions.

Uses & Benefits  
Fibre-reinforced polymer-fortified cement tile adhesive for demanding internal and external wall and floor tiling. Classified C2TES1 to ISO 13007. Suitable for swimming pools, wet areas, commercial floors, porcelain, ceramic, mosaics and moisture-stable natural stone. Open and adjustment times are about 30 minutes at 23°C. Pot life is about 3 hours.
How To Apply  
Use on clean, dry, firm substrates prepared in accordance with AS 3958. Prime porous surfaces with ARDEX Multiprime. Mechanically roughen dense concrete, steel-trowelled concrete and existing tile where required. Mix a 20kg bag with 5 to 6L of clean water. Mix 2 minutes, rest 5 minutes, then remix 2 minutes. Spread with the appropriate notched trowel and press tiles into the fresh bed with a sliding action. Back-butter tiles 400mm or larger and deeply profiled tiles to achieve full coverage. Grout after about 24 hours at 23°C, allowing longer in cold, humid or low-porosity conditions.
Limitations and Safety Info  
Do not use over metal. Do not use for moisture-sensitive natural stone. Do not use directly over substrates subject to shrinkage or timber movement without the specified ARDEX system. Floor deflection must stay within ARDEX limits: span/500 for tiles under 600mm and span/700 for tiles 600mm and larger. Do not apply below 5°C. Tiling over existing tile is not recommended in immersed applications.
Suitable Substrates  
  • Concrete, including qualifying early-age concrete.
  • Cement renders and screeds.
  • Fibre-cement sheet and plasterboard on internal walls.
  • Compressed fibre-cement sheet on floors.
  • ARDEX liquid-applied undertile waterproofing membranes.
  • Prepared existing ceramic tile in internal dry areas.
  • Ceramic Tile Underlay over suitable plywood or particleboard floors.

ARDEX X 18 Tile Adhesive Physical Properties

ARDEX X 18 Tile Adhesive Physical Properties
Property Value
Mixing Ratio 5 - 6 litres water per 20kg powder
Classification C2 TE S1
Open Time 30 mins
Adjustment Time 30 mins
Pot Life 3 hours
Ready for Grouting 24 hours
Sag / Slump None
Tensile Adhesion 28 Days Dry ≥1.0 MPa
Tensile Adhesion Water Immersion ≥1.0 MPa
Tensile Adhesion Heat ≥1.0 MPa
Tensile Adhesion Freeze Thaw ≥1.0 MPa
Bond Strength ≥1.0 MPa

ARDEX X 18 Tile Adhesive - Use Cases

Here are some common examples on where ARDEX X 18 Tile Adhesive used by our customers.

Tiling

Tiling Early-Age Concrete

Accelerating project timelines by tiling over concrete slabs after just 7 days of curing.

Its advanced formulation allows secure bonding to concrete as early as 7 days, maintaining strong, flexible adhesion.

  • Concrete minimum 7 days old
  • Concrete minimum 20 MPa
  • Flexible S1 classification
  • Fibre-reinforced for strength

Tiling

Fix Pool and Wet Area Tiles

When installing porcelain or ceramic tiles in continuously immersed swimming pools or external wet areas.

Its S1 flexibility and superior adhesion properties after water immersion and freeze-thaw ensure long-term durability in harsh environments.

  • Water immersion ≥1.0 MPa
  • S1 deformable classification
  • Suitable for swimming pools
  • Freeze Thaw ≥1.0 MPa

Tiling

Large Format Tile Fixing

Installing heavy or large format tiles (e.g., >400mm) on vertical or horizontal surfaces.

Its superior non-slump and fibre-reinforced properties securely hold demanding tiles, preventing slippage and ensuring robust adhesion.

  • No sagging / non-slump
  • Tiles >400mm (large format)
  • Fibre-reinforced properties
  • C2 TE S1 classification

Tiling

Tiling Fibre-Cement Wall Sheets

Applying fully vitrified or ceramic tiles onto fibre-cement sheets or plasterboard walls, internally or externally.

Provides strong, fibre-reinforced adhesion to common sheet substrates, ensuring robust and flexible tile installation for various applications.

  • C2 improved adhesion
  • Fibre-cement sheet substrate
  • Plasterboard walls
  • AS 3958 compliance

Tiling

Tiling swimming pools and external high-traffic areas

Installing porcelain or vitrified tiles on exterior patios, commercial pool surrounds, or submerged in swimming pools, where thermal and moisture fluctuations are high.

The adhesive's polymer-fortified, fibre-reinforced formulation provides superior bond strength and deformability, ensuring tiles remain secure in continuously wet conditions, temperature extremes, and under heavy foot traffic.

  • C2 TE S1 classification
  • Tensile adhesion ≥1.0 MPa after water immersion
  • Tensile adhesion ≥1.0 MPa after freeze-thaw
  • Non-slump properties

Alternative Products

Vendor
Example product title
$52.50
$52.50
Vendor
Example product title
$52.50
$52.50
Vendor
Example product title
$52.50
$52.50
Vendor
Example product title
$52.50
$52.50
Vendor
Example product title
$52.50
$52.50
Vendor
Example product title
$52.50
$52.50

Need Help with ARDEX X 18 Tile Adhesive?

Need more information about this product? Hit the button below and reach out to one of our experts now.

Get In Contact
Recently Viewed Products