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20kg Gripset C-Mastic bag: C2S1 non-slump tile adhesive for secure large format tile bonds over waterproofing membranes, p...
20kg Gripset C-Mastic bag: C2S1 non-slump tile adhesive for secure large format tile bonds over waterproofing membranes, p...

Gripset C-Mastic Tile Adhesive

A white C2TES1 cement adhesive that holds large-format wall tiles without slip, silica free for safer mixing. Adjust tiles for 40 minutes, and fill pools after a 7-day immersion cure.

Vendor: Gripset
SKU: TILEADGRIPCM/20
Availability: In Stock
$35.64
$35.64
Prices do not include GST
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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.

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Description  

Gripset C-Mastic is a premium white, respirable-silica-free polymer-modified tile adhesive for large-format, general wall and floor, and immersed tiling. Its C2S1TE performance gives tilers high bond strength, non-slump control and deformability across demanding internal and external installations.

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

  • Large-format porcelain and vitrified tiles
  • Internal and external walls and floors
  • Pools, pool surrounds and other approved immersed areas
  • Mosaics and non-moisture-sensitive natural stone
  • Compatible Gripset waterproofing membranes

Why choose Gripset C-Mastic?

  • C2S1TE performance: high-strength cementitious adhesion with slip resistance, extended open time and S1 deformability.
  • Large-format tile focus: Gripset specifically positions C-Mastic for large-format installations.
  • Respirable silica-free formulation: designed to reduce respirable crystalline silica exposure during powder handling.
  • Non-slump workability: supports wall tile positioning without excessive movement.
  • Early-age substrate capability: suitable over correctly prepared early-age concrete, renders and screeds within Gripset requirements.

Tile and substrate compatibility

Suitable tile types include porcelain and vitrified tiles, mosaics and non-moisture-sensitive natural stone. Approved substrates include concrete, screed and render, rendered masonry, blockwork, plasterboard linings, compressed fibre-cement sheeting and compatible Gripset waterproofing membranes.

Working data

Gripset lists approximately 7m² coverage per 20kg bag with a 10mm notched trowel, a 30-minute open time and a 40-minute adjustment time. Immersed applications require the full supplier-specified cure before exposure to water.

Important limitations

Moisture-sensitive natural stone requires a different installation system. Follow the current Gripset technical data sheet for substrate preparation, priming, tile coverage, cure times and immersed-area requirements.

Gripset system products: For substrate preparation, see Gripset GP Primer for porous surfaces and Gripset OP Primer for suitable dense or non-porous surfaces. For compatible wet-area systems, see Gripset 38FC Membrane.

Common Questions  

What classification does C-Mastic have?
It is classified C2TES1 to ISO 13007.

Can C-Mastic be used in swimming pools?
Yes. Allow about 7 days cure before filling the pool.

How long is the open time?
About 30 minutes under standard conditions.

Can it be used directly on timber floors?
No. Direct fixing to timber floors is excluded.

Uses & Benefits  
White polymer-modified cementitious tile adhesive for internal and external walls and floors. Classified C2TES1 to ISO 13007. Suitable for large-format tile, glass mosaics and moisture-stable natural stone. Open time is about 30 minutes and adjustment time about 40 minutes. Pools and other immersed systems require about 7 days cure before filling.
How To Apply  
Prepare surfaces in accordance with AS 3958. Use on qualifying concrete cured at least 7 days and at least 20MPa, or screeds and renders cured at least 24 hours. Mix with clean water according to the product instructions and apply with the correct notched trowel. Place tiles within the approximately 30-minute open time and slide them into the wet bed for full contact. Back-butter large-format or profiled tiles where required. Allow about 7 days before filling swimming pools or other immersed systems.
Limitations and Safety Info  
Do not apply below 5°C or above 35°C. Do not fix tiles directly to timber floors. Do not use with moisture-sensitive natural stone. Do not spot-fix tiles. Use a full wet adhesive bed.
Suitable Substrates  
  • Concrete cured at least 7 days and at least 20MPa.
  • Screeds and renders cured at least 24 hours.
  • Rendered masonry and blockwork.
  • Plasterboard and compressed fibre-cement sheet.
  • Compatible Gripset waterproofing membranes.
  • Prepared existing tiles after mechanical abrasion or Gripset OP Primer.

Gripset C-Mastic Tile Adhesive Physical Properties

Gripset C-Mastic Tile Adhesive Physical Properties
Property Value
Form Powder
Density 1.18 kg/dm³
Tensile Adhesion Strength 28 days dry ≥1 MPa
Tensile Adhesion Strength Water Immersion ≥1 MPa
Tensile Adhesion Strength Freeze/Thaw ≥1 MPa
Classification C2S1TE
Open Time 30 minutes
Adjustment Time 40 minutes
Pot Life 1 hour
Ready for Grouting 24 hours
Ready for Light Foot Traffic 24 hours
Ready for Wet Area Service 3 days
Immersed Areas Service 7 days
Shelf Life 12 months
Bond Strength ≥1MPa
Bulk Density 1.18kg/dm³

Gripset C-Mastic Tile Adhesive - Use Cases

Here are some common examples on where Gripset C-Mastic Tile Adhesive used by our customers.

Tiling

Immersed Area Tile Fixing

Installing porcelain, vitrified, or natural stone tiles in pools, spas, or wet area showers.

Its polymer-modified formula maintains ≥1 MPa adhesion strength after water immersion for durable performance in continuously wet environments.

  • ≥1 MPa water immersion adhesion
  • C2TES1 classification
  • 7 days immersed service
  • Respirable silica-free

Tiling

Large Format Tile Installation

Securing heavy, large format porcelain or vitrified tiles to internal or external walls and floors.

Engineered with non-slump characteristics and enhanced workability, it prevents tile slippage for precise alignment, even with heavy formats.

  • Non-slump performance
  • C2TES1 classification
  • ≥1 MPa dry adhesion
  • Ideal for large format tiles

Tiling

Versatile Floor & Wall Tiling

Adhering various tiles (porcelain, mosaic, stone) to internal or external concrete, fibre cement, or Gripset membranes.

Provides strong, flexible adhesion across diverse substrates, including early age concrete and Gripset waterproofing membranes, ensuring robust installations.

  • C2TES1 classification
  • 7 day cured concrete
  • Gripset waterproofing membranes
  • Respirable silica-free

Tiling

Fixing Large Format Tiles

Securely fixing large format porcelain or vitrified tiles to internal or external floor and wall surfaces.

Non-slump properties and high adhesion prevent tile movement, ensuring full coverage critical for challenging large format tile installations.

  • Non-slump characteristic
  • Ideal for large format tiles
  • Back-butter tiles > 300x300mm
  • ≥1 MPa tensile adhesion

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