Description
Ardex AF2525 is a low odour, low emission, solvent free two component polyurethane floorcovering adhesive. Ardex AF2525 offers very high bond strength, excellent application properties and an extended open time. It is protected from biodegradation and has good resistance to plasticiser migration.
Ardex AF2525 is ideal for installing all types of vinyl, rubber, exterior floorcoverings such as artificial grass, dense non-absorbent backed floorcoverings and some timber floorcoverings. Ardex AF2525 can be used with all Ardex Latex and Water-Based Levelling and Smoothing Compounds in both commercial and domestic internal and external locations, and is suitable for use with chairs fitted with castor wheels.
Ardex AF2525 meets the requirement guidelines for the EMICODE licence ‘EC1 PLUS R’, achieving very low emission limits.
Application:
The installation area and subfloor should be kept at the appropriate temperature as specified by the floorcovering manufacturer and the relevant clauses of BS 8203 and BS 8201. These temperatures need to be maintained 48 hours prior to installation, during installation, and 48 hours after installation.
Ardex AF2525 should be applied evenly to the suitably prepared substrate using the appropriate serrated trowel, held approximately at a 60 degree angle to the subfloor to maximise coverage and avoid forming pools of adhesive. Floorcoverings can be applied directly into the wet adhesive, ensuring full transfer to the rear of the floorcovering, however allowing the adhesive to air will improve early stage grab.
Only apply sufficient adhesive that can be covered within the working time, usually 70 minutes. Periodically check that the adhesive has transferred to the rear of the floorcovering. Remove any air pockets with a cork board or rubbing tool whilst the adhesive is still wet.
Allow the adhesive sufficient time to generate some tack before rolling with a 68kg roller, however roll the floorcovering before the adhesive hardens so that the adhesive serrations will flatten. Roll from side to side first and then end to end. Repeat as necessary to ensure the floorcovering is in contact with the adhesive at the curing and hardening phase.
Floorcoverings that are not in contact with the adhesive at the curing and hardening phase will not be bonded. Avoid spinning the roller on the floorcovering and do not leave the roller on the floorcovering during the curing phase, this can cause visible indentations in the adhesive bed. Rolling will ensure good overall contact and minimise the potential for adhesive serration grin through.
Heat welding should only commence once the adhesive has fully cured. Do not allow the floor to be wet cleaned immediately after the floorcovering has been installed. Allow significant time for the adhesive bond to develop before wet cleaning commences, typically 48 hours at 20°C.
Mixing & Priming:
Acclimatise the adhesive to the ambient temperature of the installation area, as defined in the relevant code of practice (normally 18°C). Add the entire contents of the hardener, Component B, (the bottle in the upper part of the unit), to the resin component, and mix using a suitable whisk and slow speed drill, for approximately 3 minutes until both components are thoroughly mixed together. Once mixed use immediately.
Priming is not required, however, on highly absorbent surfaces it can be advantageous to prime with Ardex P51 Priming and Bonding Agent diluted 1:3 with cold, clean water. This will maintain the working time and ensure maximum coverage of the adhesive. Do not use Ardex P51 in external areas. Contact Ardex Technical Services for further advice.
Substrate Preparation:
The subfloor must contain an effective damp proof membrane and be dry, with an equilibrium relative humidity of 75% or below. Where an effective damp proof membrane is absent, or the relative humidity of the subfloor is above 75% RH, consult the Ardex Moisture Control brochure or contact Ardex Technical Services for the correct product selection.
The subfloor must be hard, clean, free from barrier materials, sound and smooth in accordance with the relevant clauses of BS 8203, BS 8201 and BS 8204. Any dust should be removed using suitable vacuum equipment, prior to applying Ardex AF2525, as it can affect both the coverage and performance of the adhesive. Uneven subfloors should be levelled with the appropriate Ardex Latex or Water-Based Levelling and Smoothing Compound e.g. Arditex NA or Ardex K39. Ardex Ardurapid A45 Rapid Drying and Hardening Internal Repair Mortar can be used for repairs to the subfloor/stairs etc, up to 50mm thick, in accordance with the product data sheet.
Joints, nail holes and imperfections in plywood, or minor surface damage to existing levelling and smoothing compounds i.e. footprints or trowel marks, may be pre-smoothed and levelled prior to the application of Ardex AF2525, using Ardex Feather Finish in accordance with the product data sheet. Fabricated underlays such as flooring grade plywood, (SP101) should be installed where required over existing timber bases. Wood-based fabricated underlays should be suitable for the floorcovering and be at the equilibrium moisture content they will have in service at the time they are covered.
Underfloor Heating:
Underfloor heating systems should be commissioned in accordance with the heating manufacturer’s instructions; if comment cannot be found then the guidance given in BS 8203 and BS 8204 should be followed.
Thermal cycling of the subfloor will require raising the temperature of the substrate slowly, usually 10°C a day, to full operating temperature, held for a defined period, and slowly brought back down, usually 10°C a day, so that any shrinkage that is likely to take place occurs before the floorcovering is installed.
If moisture tests are required to verify the relative humidity of the substrate, the underfloor heating system should be switched off for 48 hours prior to testing. If moisture testing is not required, or after the tests are completed, the heating system should be stabilised to room temperature, but not below 15°C, before installing the floorcovering.
After installation allow at least 48 hours of constant temperature for the adhesive to properly cure, before slowly increasing the temperature up to the normal operating temperature of the area. Do not subject the floor to static or dynamic loads, loaded trolleys, etc., or move fixtures, furniture, etc., onto the flooring until the adhesive has fully set, typically 48 hours at 20°C.
Coverage:
The 6kg tub contains enough adhesive to cover up to 20m². The actual coverage achieved in practice is affected by application technique as well as the texture and absorbency of the subfloor.
Technical Data:
- Airing Time:
The time the adhesive must be left open before applying the floorcovering. Between 0-5 minutes* - Working Time:
The time in which the adhesive can receive the floorcovering, after the initial airing time. Up to 70 minutes* - Open Time:
The combination of airing and working time. Up to 75 minutes*
*depending on the absorbency of the subfloor and ambient conditions, (20°C & 65% RH). The guidance from the flooring manufacturer should always be followed if different from the information displayed above.
Click here to view this product on the manufacturers website.
Reviews
There are no reviews yet