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ARDEX Grout Booster 4L water-based polymer grout improver in white jug with handle
ARDEX Grout Booster 4L water-based polymer grout improver in white jug with handle
ARDEX Grout Booster 4L water-based polymer grout improver in white jug with handle
ARDEX Grout Booster 4L water-based polymer grout improver in white jug with handle

Ardex Grout Booster

A water-based polymer additive for ARDEX cement grouts. Improves adhesion, flexibility, abrasion resistance and water repellence on timber floors, heated substrates and wet-area tiling.

Vendor: Ardex
SKU: GROUTBOOSTARD/4
Availability: Out Of Stock
$68.72
$68.72
Prices do not include GST
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Download Product Data

Download TDS Download SDS Download Ardex Grout Booster Supporting Document
Description  

ARDEX Grout Booster is a water-based polymer additive for compatible ARDEX cement-based tile grouts. Used in place of some or all of the normal mixing water where specified, it improves grout flexibility, adhesion, abrasion resistance and water repellence.

It is particularly useful where tiling is exposed to greater movement or moisture, such as suitable timber floors, heated substrates, balconies and swimming pools. Grout Booster is an additive to a suitable grout—not a grout, waterproofing membrane or flexible movement-joint sealant on its own.

When to choose Grout Booster

  • Grouting compatible tiled timber floors and heated subfloors.
  • Swimming pool grouting where the selected ARDEX grout and colour are approved for immersion.
  • External and wet-area installations requiring the supplier-specified enhanced grout system.
  • Projects where improved grout adhesion, flexibility and wear resistance are important.

Choosing the grout and mixing method

ARDEX FG 8, FS-DD and Wide Joint grouts have different permitted applications and mixing proportions. The correct Booster-to-water ratio depends on the exact grout, tile location and substrate. In swimming pools, the specified grout colour and curing conditions are also important. Do not assume that one dilution ratio applies to every ARDEX grout or installation.

Always measure liquids for the specific approved combination, mix with clean equipment and test cleanability on porous or textured tile finishes. Some applications require a longer return-to-service or immersion cure than grout mixed with water alone.

Important limitations

Grout Booster does not make cement grout suitable for chemical-resistant joints, movement joints or every pool condition. Choose an appropriate epoxy grout where chemical resistance is required, and use a flexible sealant for movement joints. Select the compatible grout and preparation method for the particular substrate and exposure.

Common Questions  

What does ARDEX Grout Booster do?
It improves flexibility, adhesion, abrasion resistance and water resistance in compatible ARDEX cement grouts.

Can it be used in swimming pools?
Yes, with the ARDEX grout and booster ratio specified for the pool system.

Can it be used for movement joints?
No. Use a compatible flexible sealant for movement and expansion joints.

Can it be used on timber floors?
Yes, with the compatible ARDEX grout and mix ratio specified for timber-floor systems.

Uses & Benefits  
Water-based synthetic polymer additive for ARDEX cement-based grouts. Improves adhesion, flexibility, abrasion resistance and water resistance. Useful on dense tile edges, timber floors, heated subfloors, heavy pedestrian areas and selected pool applications. Contains ARDEX Grout Shield to combat mould growth. Suitable for internal and external wall and floor grouting.
How To Apply  
Shake or stir the additive before use. Measure the Grout Booster and water ratio required for the selected ARDEX grout and service condition. Add the grout powder gradually while mixing until a uniform low-slump mortar forms. Apply and clean the grout using the current ARDEX grout instructions. For pools, timber floors and other demanding applications, use the higher booster ratio specified for the selected grout.
Limitations and Safety Info  
Do not use cement-based grout with Grout Booster where chemical-resistant joints are required; use the specified ARDEX epoxy grout. Do not fill expansion or movement joints with cement grout; use the compatible flexible sealant. Use only with the ARDEX cement-based grouts and mixing ratios specified in the current TDS. Do not apply below 8°C or above 35°C. Test textured, porous or matt tiles for cleanability before general use.
Suitable Substrates  
  • ARDEX cement-based grout systems.
  • Ceramic, porcelain and fully vitrified tile joints.
  • Moisture-insensitive natural-stone and mosaic joints where the selected ARDEX grout is suitable.
  • Timber-floor and heated-subfloor tiling systems approved by ARDEX.

Ardex Grout Booster Physical Properties

Ardex Grout Booster Physical Properties
Property Value
pH 9 - 10
Application Range 8ºC – 35ºC
Ready for Traffic 24 hours
Full Cure 14 days
Clean Up Water

Ardex Grout Booster - Use Cases

Here are some common examples on where Ardex Grout Booster used by our customers.

Tiling

Grouting over moving floors

When grouting tiles over timber floors, plasterboard, or heated sub-floors, where movement causes cracking.

This additive provides increased flexibility and adhesion to ARDEX grouts, preventing premature cracking from substrate movement.

  • flexible over timber floors
  • increased elastic on heated sub-floors
  • improves adhesion on plywood
  • reduces cracking

Tiling

Water-repellent pool grout

Grouting tile joints in swimming pools, external balconies, or other wet areas requiring water-resistant finishes.

The polymer additive creates water-repellent grout joints with enhanced adhesion, ensuring durability in submerged and exposed wet conditions.

  • water-repellent in swimming pools
  • improves adhesion to dense tiles
  • on external balconies
  • 100% booster for ARDEX Wide Joint

Tiling

High-traffic floor grout

Grouting floors in heavy pedestrian traffic areas where powdery grout, staining, or efflorescence is a concern.

It significantly enhances abrasion strength and reduces efflorescence and staining, maintaining grout integrity and appearance in demanding environments.

  • enhances abrasion for heavy traffic
  • reduces efflorescence
  • assists reducing staining
  • 24 hour ready for traffic

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