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.
Which Gripset tile adhesive? Choose C-Mastic when a white, non-slump C2S1TE adhesive is needed for large-format porcelain, mosaics or compatible immersed tiling. For highly deformable C2TES2 performance on heated floors, compare Gripset C-Lite. For economical general wall and floor work, compare Gripset C-Rubber.
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.
A 20kg bag covers approximately 7m² using a 10mm notched trowel. Open time is about 30 minutes, adjustment time about 40 minutes and pot life about one hour. Tiling can be grouted after about 24 hours; allow approximately 3 days before wet-area service and 7 days before immersion under standard conditions.
Do not use C-Mastic on moisture-sensitive natural stone. Confirm the substrate is stable and suitably prepared, and allow full adhesive cure before exposure to water. In pools and other immersed areas, use the compatible waterproofing, adhesive, grout and joint-detailing system throughout.
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.
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.
| 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 |
Here are some common examples on where Gripset C-Mastic Tile Adhesive used by our customers.
