Ultra Tile Pro SS Flex is a single part, standard set, flexible adhesive for wall and floor tiles. It is specially formulated with enhanced adhesion and flexibility for use with ceramic, porcelain and natural stone tiles. Ultra Tile Pro SS Flex is a polymer modified adhesive suitable for use with most common substrates. It is able to take light foot traffic within 16 hours of installation depending upon temperature and substrate.
TECHNICAL DATA
Unit Size: 20kg Bags
Colours: Grey & White
Classification: EN12004 Class C2TE
Bed Thickness: 3mm – 16mm
Grout After*: 16 hours
Coverage: 4.5kg / m² at 3mm Bed Thickness
Pot Life*: 2 Hours at 20°C
Set Time*: 16 Hours at 20°C
Application Temperatures: 5°C to 25°C
*Depending on temperatures, substrate and site conditions
SURFACE PREPARATION
All wall and floor substrate preparation must conform to BS 5385 Part 1 Tiling Code of practice; be clean, dry, firm and stable, free of dust, dirt, oil and grease. Substrates should be strong enough to support the weight of the adhesive and tiles being fixed (see datasheet for loadings).
For plasterboard and plaster finishes that have been painted and are showing a weak or flaky surface finish then mechanical sanders or hand sanding blocks are generally used to remove the film. However for the likes of floor screed surface contamination, adhesive residues and weak surface laitance or even smooth dense floors such as power floated concrete, these will require a more heavy duty scarifying using specialist flooring equipment to remove the surface of the substrate to ensure the substrate is sound, stable and has a rough open texture. To encourage best adhesion to the substrate it is advisable that prior to applying adhesive that substrates are primed (please see priming section below).
Remember - sanding or mechanical abrasion of any surface will leave powder deposits which require thorough removal by suitable vacuum equipment to provide a clean dust free surface. Failing to remove fine powder deposits and weak surfaces is a common reason for de-bonding of tile adhesive and primer from the substrate. Using a wet sponge to clean down a wall or floor of dust deposits only serves to spread it around, it is therefore advisable to vacuum thoroughly prior to use of wet sponge.
Tile on Tile:
It is always preferable to remove existing tiles however fixing new to old is an accepted method as long as the existing tiles are sound, stable, dry, securely bonded and fixed to a background that is capable of taking the additional weight. Ceramic, porcelain and quarry tiles should be lightly abraded to form a mechanical key degreased and ensured thoroughly clean. For existing vinyl floor tiles only hard and “crunchy” vinyl tiles should be considered to be over-tiled. Be aware that some old tiles of this type contained asbestos so should not be abraded. Do not over-tile onto softer vinyl, quartz or composite tiles.
Calcium Sulphate Floor Screeds:
It is essential that the floor is fully dry, if in doubt always check the moisture level of the floor is below 75% RH using a hair hygrometer before continuing. This type of floor can also suffer from surface laitance issues creating a weak surface layer and therefore they are highly likely to require specialist mechanical abrasion as indicated above.
Timber/Wooden Floors:
All chipboard and T&G flooring should be overboarded using exterior or class 3 type plywood boards of minimum thickness 15mm or suitable cement backer boards. All over-boarding should be dry and conditioned to the environment in which they are to be used. Plywood overboards should have backs and edges sealed to prevent ingress of moisture and atmospheric humidity, as should the face to be tiled. A neat coat of Ultra Tile Pro Primer should be used to carry out the sealing process prior to installing the boards. The plywood boards should then be positioned, close butted and firmly screwed (not nailed) through the underlying flooring to joists ensuring a max distance between fixings of 300mm centres or less. If using cement backer board to over-board the timber/wood floor, then it should be of flooring grade and of suitable strength for the application to prevent deflection. It should be 9mm minimum thickness. The backer board should be bonded using a minimum classification of S1 type tile adhesive and the original wooden floor should be thoroughly cleaned and free of any surface coating or wood treatment. It should also be primed using a neat coat of Ultra Tile Pro Primer.
Underfloor Heating (UFH):
If UFH is being installed it must be fully commissioned before starting the tiling process to ensure it is in full working order. This includes both electric mat and water pipe systems. Once the UFH has been commissioned it can be set to a low level to provide a max floor temperature of 15˚C whilst the tiling and grouting processes are undertaken. It is critical that this temperature is not exceeded as this can force dry the adhesive and grout with the potential of causing cracks in the installation or tiles to de-bond. Maintain this temperature for a minimum period of 7 days while the installation cures and hardens. After this time the UFH can be brought up to the required room temperature slowly at a rate of 5˚C per day.
Render:
When tiling to new render it must be ensured that the render is a minimum of 4 weeks old and is thoroughly strong, dry, dust and efflorescence free and stable.
PRIMING
Ultra Tile Pro Primer has been specifically developed to be used as a primer for use with cementitious tile adhesives to provide improved sealing and bonding properties for a variety of substrates.
Porous Substrates (includes: plaster, skimmed plasterboard, plasterboard, sand/cement, calcium sulphate screeds, cement backer boards, render and other open textured substrates): Prime with 2 coats of Ultra Tile Pro Primer. The first coat should be diluted 1 part primer to 3 parts clean water (by volume) and allowed to dry for a minimum period of 1 hour. When dry, apply a second coat diluted 1:1 (by volume) and leave for 1 hour to dry before continuing the tiling process.
Non-porous & Low Porous Substrates (includes: cured epoxy DPMs, tile on tile applications, foil faced insulation boards, plywood floor overboarding, plywood walls): We recommend Ultra Tile Pro Primer in a single, neat application.
NB: Please see technical datasheet for Ultra Tile Pro Primer for coverage rate details. If in doubt as to the need for priming please consult Ultra Tile Technical Department.
MIXING
Once the substrate has been prepared, continue with the tiling installation. Ultra Tile ProSS Flex should be added slowly to clean water in a suitable clean mixing tub and mixed thoroughly using a drill/mixer and paddle to give a slump free, easily worked mortar consistency. Once mixed the mortar is immediately ready for use and has a pot life of approximately 2 hours at 20˚C. Mix only sufficient material to be used within the pot life of the product. Do not remix or rewet/dilute product which has aged and is starting to thicken or set.
Mixing Ratio:
Grey 20kg unit requires 5.5L - 5.7L of water
White 20kg unit requires 5.8L - 6.0L of water.
APPLICATION
Apply the adhesive to the required thickness (limits 3mm - 16mm) in areas up to 1 sq./m at a time. For internal walls use a notched trowel to the following notch dimensions to provide solid rib lines:
Mosaic tiles: 3mm x 3mm at 6mm centres
General wall tiles: 5mm x 5mm at 10mm centres
General floor tiles: 8mm x 8mm at 16 mm centres
For floors and external applications we advise to use the solid bed method. This involves applying a uniform bed of adhesive to the floor and “buttering” the back of the tile with the same adhesive. When the tiles are bedded with a twisting action, pressing firmly down it ensures 100% contact is made with both the floor and the tile.
When fitting tiles leave spaces between each of the tiles to allow for grouting (approx: walls 1mm to 2mm and floors 2mm to 3mm).
Before the tile adhesive sets clean off the excess adhesive from the face of the tile and grout joints with a clean damp cloth or sponge.
WALL TILING & LOADINGS
Wall types vary considerably but all have the same basic need to be structurally sound, strong, smooth and level. It is essential that the wall to be tiled has sufficient inherent strength to hold the proposed tile and the adhesive being used. The following chart lists maximum national standard loadings for a variety of wall substrates:
LOADINGS
Gypsum plaster 20 kg / sq./m
Skimmed plasterboard (gypsum) 32 kg / sq./m
Plywood (exterior grade) 30 kg / sq./m
Gypsum fibre boards 40 kg / sq./m
Cement tile backer boards 40 kg / sq./m
Glass reinforced cement sheets 50 kg / sq./m
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