A thin-bed standard set, flexible, ceramic tile adhesive with excellent non-slip characteristics. CTA flexible has a regular setting speed and for a strong bond to fully vitrified tiles ad is ideal for tile-on-tile work. Its flexibility makes it suitable for use on backgrounds subject to limited movement, flexing or vibration, as well as underfloor heating systems. Completely waterproof, frost resistant and suitable for interior and exterior use, particularly swimming pools, showers, saunas and bathrooms, CTA flexible is ideal for fixing large format tiles.
For fixing all types of ceramic floor and wall tiles, porcelain, mosaics, natural stone and similar wall and floor finished. Can also be used on timber panels, composite boards and impermeable surfaces and on backgrounds subject to limited movement, flexing or vibration and underfloor heating systems. This product is particularly ideal for use with porcelain and light coloured tiles (ones which may be subject to staining) as it will prevent trowel marks grinning through.
Preparation
All surfaces, including existing tiles, must be clean, structurally sound and free from dust, oil, grease, curing compounds, wax residues, paint and any other contamination that may prevent adhesion. Any separating agents must be removed. CTA FLEXIBLE can accommodate minor surface irregularities provided that the bed thickness does not exceed 6mm (up to 12mm in isolated areas). Porous gypsum, aerated concrete and interior asphalt substrates should be primed with products such as Bond It PRIMER AND FLEXIBLE ADDITIVE (P&FA). Note: PVA is not recommended for priming. Plastered surfaces must be strong enough to support the combined weight of the tiles and adhesive. Allow 4 weeks for plaster to dry. Plaster and plywood must be primed with Bond It PRIMER AND FLEXIBLE ADDITIVE. Tongue and groove floorboards should be covered with a minimum of 15mm exterior grade plywood sheet, screwed at 300mm centres and primed accordingly. Chipboard must not be used. The surface of existing tiles should be sound, any loose or hollow sounding tiles should be made secure. Any surface contaminants must be removed. When tiling on vinyl tiles, check they are securely bonded and are free from polish, wax or other substances that may impede adhesion. Provide a key by rubbing with coarse sandpaper and prime with Bond It PRIMER AND FLEXIBLE ADMIXTURE. When tiling on substrates incorporating underfloor heating, turn off 48 hours before tiling and do not turn on for 48 hours after completion, from a low setting slowly increasing the temperature by +5o C per day. Anhydrite/calcium sulphate screeds should be sanded and vacuumed before priming with 2 coats of Bond It PRIMER AND FLEXIBLE ADMIXTURE and left to dry for 24 hours prior to application.
