CEMIX FLEXISET TILE ADHESIVE is a premium grade highly flexible polymer engineered rubber modified grey cement based water resistant adhesive for interior or exterior fixing of a wide range of tiles on to a variety of substrates ,complies with C2TES1. CEMIX FLEXISET TILE ADHESIVE is a highly flexible, polymer engineered and rubber modified, cement based adhesive used for most internal external wall and floor applications including bathrooms, toilets, laundries, kitchens, decks, verandahs and existing tiles. Suitable over concrete, cement renders, screeds, fibrous cement sheeting, plasterboard and Cemix approved waterproofing membranes. In conjunction with CEMIX SELF LEVELLER, it can be used for under tile heating applications. When using with translucent tiles, the colour of the adhesive should be taken into consideration.
The substrate should be free of dust, grease, wax, oil, dirt, loose plaster, laitance, curing compounds, paint and all other friable materials and contaminants likely to prevent the adhesive bonding. New concrete should be left with a wood float finish and sufficiently aged for a minimum of 7 days. Shiny smooth surfaces on old concrete should be acid etched or scabbled. Cemix cement screeds/floor levelers/ renders must be allowed to cure for a minimum of one day. All substrates should be structurally sound, securely fastened and properly supported to eliminate any movement, which may cause cracking. CEMIX FLEXISET is suitable for tiling over timber floors, provided that a fibre cement sheet tile underlay is initially installed over the timber floor. Refer to the substrate test guide below for recommended surface preparation. Certain non-absorbent substrates that are suitable for tiling should be primed with CEMIX ROCKET PRIME. For more information, contact the Cemix Technical support.
All workmanship must be carried out in accordance with AS3958.1-2007. Spread the adhesive evenly with a 6mm X 6mm notched trowel for tiles up to 150mm X 150mm and for larger tiles use a 10mm X 10mm notched trowel. Lay the tiles with a good pressure, twisting to ensure good contact with the adhesive. In more demanding exterior situations, tile on tile applications or if tiles with high ribs or lugs are being used, it is preferable to spread the backs of the tiles with a thin layer of adhesive in addition to the adhesive being trowelled substrate, before laying. When adhering to non-porous surfaces or tiles, please ensure that a minimum of 90% of adhesive contact is achieved to the back of the tiles. For wall tiling a minimum final bed thickness between 1 – 3mm is recommended, whilst for floor tiling a minimum final bed thickness between 3 – 10mm is recommended. Do not spread more than 1m2 of adhesive at any one time as skinning may occur affecting final adhesion. Press tiles onto the adhesive before it skins and ensure that the tiles are fully supported with the adhesive with no voids. Occasionally, in order to ensure that full coverage is being maintained, a tile should be removed, the adhesive coverage noted and the tile be re-laid accordingly. Once the tiles have been laid, they must not be trafficked upon or disturbed for a minimum of 24 hours at 20°C. Allow 48 hours if temperature will fall below 20°C or tiling over Cemix approved waterproofing membranes, non-porous substrates or tile-on-tile applications.
ERFORM THE SUBSTRATE TEST
No water absorbed: Mechanically prepare substrate
Moderate water absorbed: Clean with damp sponge and water
All water absorbed: Broom on liberal amounts of water
This simple test is performed after vacuuming or sweeping a number of test areas and applying a single drop of fresh drinking water from the end of your finger. This should be approximately 20mm wide when it first hits the floor –if it beads and remains whole then “No water is absorbed”. If it loses all gloss within 20 – 60 seconds then “Moderate water is absorbed”. If the gloss disappears instantly or within 20 seconds then the substrate has “All water absorbed”. Look for different surface appearance in your floor and test each to ensure your test is representative of the whole area. Perform test in both a cool shaded area and an exposed sunny area if tiling externally. Prime all substrates with CEMIX ROCKET PRIME (non – absorbent) or with CEMIX CEMLASTIC Primer and Additive. For further information, please contact the Cemix Technical support.
MOVEMENT / CONTROL JOINTS
Movement joints must be incorporated at the design stage and in accordance with AS3958.1-2007 as follows:
Note: Movement joints should go right through the tile adhesive bed tot he background and be kept free from dirt and adhesive droppings. Movement joints must not be less than 6mm or greater than 10mm wide. All movement joints that are 6mm wide can be filled with flexible sealant.
Clean the tile faces with a damp sponge before the adhesive and grout sets. Clean tools with water before the adhesive dries.