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Ardex Flex FS Tile Grout Flexible Standard Set All Colours
Ardex Flex FS Tile Grout Flexible Standard Set All Colours

Ardex Flex FS Tile Grout Flexible Standard Set All Colours

In stock

Product Options:

Description

Ardex Flex FS Tile Grout Flexible Standard Set All Colours

ARDEX-FLEX FS is formulated to blend to a uniform colour, ensuring a consistent, streak-free finish, and it is suitable for commercial and domestic locations including swimming pools, showers and kitchens.

  • Consistent, streak free results
  • Water repellent and dirt resistant
  • Ideal for commercial and domestic environments such as swimming pools, showers and kitchens
  • Suitable for joints up to 4mm wide
  • Ideal for almost all tile types including non-moisture sensitive natural stone
  • Suitable for wall and floor applications
  • Suitable for internal and external areas, including swimming pools
  • Suitable for use with underfloor heating
  • Available in 35 different colours to suit any tiling installation, and colour samples are available to order through the Request Samples form below
  • ARDEX ST Elastic Silicone Sealant is available in Transparent & 13 colours designed to match the most popular ARDEX-FLEX Flexible Tile Grout colours

Colours Available: 35 different colours

Unit Size Available: 10kg & 2.5kg

Grout Type: Cementitious, Wetrooms, Swimming Pools, Food Preperation Areas, Underfloor Heating, Wall and Floor, Internal, External
Grout Joint Size Up to 4mm Wide
Grout Drying Speed 5 Hours
Flexible Yes
Drying Speed Walkable in 5 hours
Joint Width 1-4mm wide

ARDEX-FLEX FS Flexible Tile Grout (Up to 4 mm Joints)

ARDEX-FLEX FS is a high-performance flexible cement-based grout engineered for narrow joints up to 4 mm. It delivers a consistent, streak-free finish with excellent water repellency and dirt resistance, making it ideal for walls and floors in both residential and commercial environments. Built for performance, it combines quality, colour consistency, and long-term durability.

Key Benefits

  • Designed for narrow joints up to 4 mm, perfect for rectified tiles.
  • Water repellent & dirt resistant — helps maintain a clean, long-lasting finish.
  • Smooth, streak-free finish helps minimise grout haze and enhances aesthetic quality.
  • Versatile tile compatibility — suitable for porcelain, ceramic, quarry, and glass blockwork.

Ideal For

  • Internal & external wall tiling
  • Floors with narrow grout lines
  • Wet areas such as bathrooms & showers
  • Underfloor heating systems

Best Practice Notes

  • Mix to a smooth, workable paste with clean water only.
  • Work in small areas for consistent colour and finish.
  • Remove excess grout promptly to avoid haze.

Installation Overview

Spread the mixed grout at an angle using a grout float, completely filling joints and forcing grout tightly into corners. Clean tiles with damp sponges as you go and polish off remaining haze once the grout has firmed up. Follow pack instructions for water addition and cleaning stages to suit tile type and site temperature.

ARDEX-FLEX FS vs ARDEX-FLEX FL — Technical Comparison

Side-by-side grout comparison to help choose the right option for joint width and site speed.

Feature
ARDEX-FLEX FS
ARDEX-FLEX FL
Product Type
Flexible Tile Grout
Flexible Rapid-Setting Tile Grout
Recommended Joint Width
Up to 4mm (narrow joints)
3–15mm (wide joints)
Setting Speed
Standard setting
Rapid setting
Walkable Time
—
Approx. 90 minutes
Finish
Consistent, streak-free finish
Consistent, streak-free finish
Water Repellent
Yes
Yes
Dirt Resistant
Yes
Yes
Heated Floors (UFH)
Suitable
Suitable
Typical Use Cases
Rectified porcelain/ceramic, narrow joints, premium finish
Wider joints, floors needing quick turnaround, large-format installs
Bag Sizes
10kg & 2.5kg (selected shades also in 5kg)
10kg & 2.5kg (selected shades also in 5kg)
Best For
Narrow joints and a clean, refined look
Wide joints and fast site progress

FAQs

What joint width can ARDEX-FLEX FS grout? ⌄
It’s formulated for narrow joints up to 4 mm, ideal for rectified and tight-joint tiles.
Is it suitable for wet and high-moisture areas? ⌄
Yes — it’s water repellent and dirt resistant, making it suitable for bathrooms, showers, and kitchen areas.
Can I use ARDEX-FLEX FS with underfloor heating? ⌄
Yes — it’s compatible with underfloor heating systems when installed as part of a correct tiling system.
What pack sizes and colours are offered? ⌄
Available in 2.5kg, 5kg, and 10kg bags across a broad colour range to suit most tile styles.

Technical Info

Type Grout
Brand Ardex
Area Indoors | Outdoors

Delivery & Returns

Delivery Information

Delivery Costs:

Delivery fees are calculated based on the weight of your order and your delivery location. You can use the delivery fee calculator in your basket or on the checkout page to find the exact cost.

Delivery Area:

We currently only deliver to UK Mainland and the Highlands. We do not deliver to the Islands, Ireland, or Northern Ireland.

Next Working Day Delivery (Subject to Stock Availability):

Orders placed before 12:00 pm (noon) will be delivered the next working day, excluding weekends and holidays. This service starts from £6.50 (including VAT) and the final cost is based on the weight of your order and your delivery location. You can check the exact cost in your shopping cart or on the checkout page by entering your postcode.

Cut-off Time for Genesis Products (Non-Stocked): 11:00 am

NO Next Day Service - Scotland:

We are unable to offer next-day service to the following postcode regions in Scotland.

Postcode: AB, IV, KW, PA .

Economy Service (2-3 Working Days):

This service is only available for orders over 50kg. There is no additional charge for this service.

Sample Orders:

All sample orders are shipped for free via Royal Mail Tracked 48 or 24 service. Delivery typically takes 1-3 working days.

Delivery Methods:

Non-sample orders under 50kg will be dispatched via DPD or APC Overnight. Non-sample orders over 50kg (quarter, half, and full pallets) will be dispatched via Palletways or Kandrmason (Kerbside delivery only).

Order Online & Collect In-Store!

Simply place your order online and choose the Click & Collect option at checkout.

We'll email you once your order is ready for pickup at your chosen store.

Collection hours: Monday - Friday: 8:30 am to 4:30 pm

For more information, please visit our Delivery Information page.

Returns Information
  • Please inspect your order upon receipt and contact us immediately (within 48 hours of receipt) if the item is defective, damaged, or if you receive the wrong item, so that we may evaluate the issue and make it right.
  • We will replace any items that are damaged during transit within 30 days of delivery.
  • We accept returns within 30 days of delivery.
  • Please note that customers are responsible for the cost of returning items where the return is due to a change of mind, including ordering the wrong item, ordering more than required, or any other non-fault reason
  • We will process returns and refunds promptly once the items are received at our warehouse.

Returning Trims

Schluter Trims:

  • Returning trims - 35% restocking fee applied.
  • Returning trim with replacement - 15% restocking fee applied.
  • Customers are responsible for arranging the return.
  • If we arrange a return collection, a £35 return item collection fee will be applied.

Mapei-Profilpas Trims:

  • A 20% restocking fee will be applied (item must be in re-sellable condition).
  • The customer is responsible for returning the item.

For more information, please visit our Return & Exchange page.

Delivery Costs:

Delivery fees are calculated based on the weight of your order and your delivery location. You can use the delivery fee calculator in your basket or on the checkout page to find the exact cost.


Delivery Area:

We currently only deliver to UK Mainland and the Highlands. We do not deliver to the Islands, Ireland, or Northern Ireland.


Next Working Day Delivery (Subject to Stock Availability):

Orders placed before 12:00 pm (noon) will be delivered the next working day, excluding weekends and holidays. This service starts from £6.50 (including VAT) and the final cost is based on the weight of your order and your delivery location. You can check the exact cost in your shopping cart or on the checkout page by entering your postcode.


Cut-off Time for Genesis Products (Non-Stocked): 11:00am


Economy Service (2-3 Working Days):

This service is only available for orders over 50kg. There is no additional charge for this service.


Sample Orders:

All sample orders are shipped for free via Royal Mail Tracked 48 or 24 service. Delivery typically takes 1-3 working days.


Delivery Methods:

Non-sample orders under 50kg will be dispatched via DPD or APC Overnight. Non-sample orders over 50kg (quarter, half, and full pallets) will be dispatched via Palletways or Kandrmason (curbside delivery only).


ORDER ONLINE & COLLECT IN-STORE!

Simply place your order online and choose the Click & Collect option at checkout.
We'll email you once your order is ready for pickup at your chosen store.
Collection hours: Monday - Friday: 8:30 am to 4:30 pm


For more information, please visit our Delivery Information page.

- Please inspect your order for any damages upon delivery and notify us immediately if you find any.

- We will replace any items that are damaged during transit.

- We accept returns within 30 days of delivery.

- Please note that customers are responsible for the cost of returning items.

- We will process returns and refunds promptly once the items are received at our warehouse.


Returning Trims
Schluter Trime
Returning trims - 35% restocking fees applied.
Returnign trim with replacement - 15% restocking fees applied
Customers are responsible to arrange returning the item.
If we arrange a return colleciton, a £35 return item collection feed will be applied.


Mapei-Profilpas Trims
A 20% restocking fee will be applied. (Item must be in re-sellable condition)
The customer is responsible for returning the item.


For more information, please visit our Return & Exchange page.

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