More about the product Recommended uses -Adhering parquet, solid strip softwood and hardwood flooring, engineered flooring and bamboo flooring to concrete or timber subfloors. -Adhering recommended acoustic underlays as an intermediate layer between subfloor and flooring system. Preparation All surfaces must be clean, dry and free of voids, curing compounds, loose materials, oil, grease and or similar that can affect adhesion. All surfaces must be structurally sound before application. Where previous adhesives (PVA or bituminous adhesives) or contamination (waxes, coatings etc) is suspected or in evidence, thorough removal of all such contamination must be carried out. Concrete slab should be built in accordance with Residential Footings and Slabs Code AS2870. The subfloor should be flat to 3mm over 3m. There is no gap more than 3mm beneath the straight edge when placed on the slab. If exceeding, level the area with Bostik Roxol Trafic 3 self levelling compound. Mixing No mixing is required. Simply use directly from pail or sausage. Application Full trowel bed installations are the preferred method for direct stick over standard concrete slabs or slabs incorporating radiant heating and for all acoustic underlayment options. Full trowel bed is also necessary where specified by the flooring product manufacturer or industry recommendations in ATFA publications. – Apply a single application of Ultraset SF using a 3 to 4mm “V” notch / or similar square notch trowel (refer to trowel selector chart for optimum trowel size. Depending on selected flooring type and dimensions and condition of slab, a larger notch size trowel may be recommended). – Evenly spread the Ultraset SF with the trowel and set flooring material with enough pressure to ensure full contact between the Ultraset SF and the timber until full cure of the Ultraset SF is achieved, (minimum 24 hours but under low humidity and temperatures it may take longer). – For solid strip flooring, the preferred method to maintain pressure is to weight the floor, but as per ATFA guidelines*, the floor can be temporarily nailed, or permanently nailed to the subfloor. – (Not recommended for direct stick applications) If relying on mechanical fixing and use of beads of adhesive in applications to plywood, plasterboard, joists or batten then this should be in accordance with timber flooring manufacturer recommendations or industry recommendations in ATFA publications*. Coverage Although coverage will depend on substrate conditions and “V” notch or square notch trowel size (refer to trowel selector chart for optimum trowel size) a coverage of approximately 1.1 to1.3 square meters per litre is required. Full coverage and floor pressure must be maintained to achieve a minimum of 80% bond area contact of Ultraset SF between the subfloor and flooring. Important notes Ultraset SF should not be applied over any acrylic primer or sealer. – Do not apply Ultraset SF on a dense burnished concrete surface without prior to abrading or sanding back the surface to obtain mechanical key. Refer to a Bostik Technical Representative. – If Ultraset SF is to be used in conjuction with Bostik UL200 then ensure that none of the Bostik UL-Primer is left exposed. Ultraset SF will not adhere to the Bostik UL-Primer, whenever the primer is applied the Bostik UL-200 must be applied over or the excess primer removed prior to the installation of Ultraset SF. – Requires atmospheric moisture to cure properly. In low humidity conditions below 40%, refer to Bostik Technical Representative. It should not be used in totally confined to air free spaces. – Timber flooring may need to be acclimatised to the relevant environment to prevent excessive expansion / shrinkage causing failure of the floor system. Additional expansion allowance may also need to be provided (refer to timber manufacturers’ or ATFA installation procedures as applicable). – Ultraset SF is not a waterproofing membrane. It should not be used for waterproofing a subfloor. – Ultraset SF should not be installed on wet, contaminated or friable surfaces. – Utlraset SF should not be exposed to water and alcohol based cleaners before it has completely cured. – Ultraset SF must be fully cured prior to sanding. Allow a minumum of 24 hours. Variations in temperature and humidity affect curing rates. Note also that industry recommendations indicate that it can be beneficial for a floor to be left for a period of 3 to 14 days prior to sanding. – Ultraset SF is suitable for installation with recommended acoustic underlays. – Bamboo flooring can be very sensitive to the effects of moisture vapour, therefore two coats of Ultraseal Vapour barrier are recommended in all applications. Packaging 16 kg pail 600ml sausage, 20 sausages per carton Clean Up Cleaning solvents such as mineral spirits, Shellite, or paint thinners or Bostik Handi-Clean towels can be used to remove excess. This should be done immediately for optimum results. Care should be taken to prevent any reaction or damage to prefinished timber coatings. *As per ATFA publication `Timber Flooring’ 2009, `Engineered Flooring Industry Standard’ 2012 and `Bamboo Flooring Industry Standard’ 2012. Storage and shelf life Store in original sealed container, under cover and in dry conditions. Ultraset SF has a shelf life of 12 months from the date of manufacturing in original, unopened containers if stored between 5oC and 30oC. Health and safety See the Material Safety Data Sheet for additonal information.
