Sikafloor®-1240

12 months from date of production

Store in original unopened packaging in a cool and dry condition between +5°C and +35°C. Protect from direct sunlight, heat and moisture.

~2.14 kg/l (mixed, at 25°C)

≥ 2.5 N/mm² (or concrete failure)

Sikafloor®-1240 has  good general chemical resistance, but as in all corrosive situations a full analysis of operating and exposure conditions is required, followed by reference to chemical resistance data, to ensure product suitability. Contact Sika representative for further information in regards to specific project requirements.

Min. 5 mm

+10°C min. / +40°C max.

+20 % min. / +80 % max.

Beware of condensation!
The substrate and uncured floor surface temperature must be at least 3°C above the dew point to reduce the risk of condensation which could result in lack of adhesion and/or blooming.

< 5 % pbw moisture content.
Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).

The pot life starts when the resin and hardener are mixed. It is shorter at high temperatures and longer at low temperatures. The larger the quantity mixed, the shorter the pot life.

Note: Times are approximate and will be affected by changing ambient and substrate conditions, particularly temperature and relative humidity.

Note: Minimum application thickness of Sikafloor®-1240 is 5 mm

These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage etc.

Mixing should preferably be carried out using a forced action mixer.

Add the base, reactor and colour pack to the mixer completely emptying the contents of the containers. Mix for 1 minute until a uniform colour is achieved. Slowly add the aggregate component and mix for a further 3 minutes until a uniform colour and consistency is achieved.

Mixing times should be varied according to temperature but typically 4 minutes in total is sufficient. It is important to maintain constant mixing times throughout, to ensure consistent colour and to avoid introducing excessive air into the system.

Priming:

Prime using Sikafloor® P 1240/50. Mix the two components using a slow speed drill with a suitable paddle. Mix until uniform consistency is obtained. The components are preweighed and should not be split or divided.

• Apply by brush or roller and work well into the surface.
• Apply according to the required coverage.
• Allow to stand for 20 minutes before applying the Sikafloor®-1240 to check for absorption.
• If the surface becomes matt, showing absorption, reprime the surface.
• Apply the Sikafloor®-1240 whilst the primed surface is still tacky.
• If the primer hardens reprime within 24 hours.

Epoxy mortar screed application:

• Divide the total area into bays, covering only an area that can be applied within the pot life of the product.
• Place the mixed screed while the primer coat is still tacky.
• Spread the Sikafloor®-1240 mixture evenly onto the substrate using levelling boards and guide rails, by giving it a surcharge over preinstalled batten (e.g. steel guides adjusted to desired height)
• Than tamp down the screed heavily to desired level to give full compaction. When applied in higher thicknesses, compact the screed in layers.
• Level the screed by striking off excess material by running a straight edge ruler across batten.
• Compact thoroughly by tamping.
• Smooth with a hand trowel.
• Finish by steel floating.

Clean all toools and equipment immediately after use with a suitable thinner (Xylene / MEK / Acetone). Once hardened, the material can
only be removed mechanically.