Sikafloor®-125 Level Flex

Meets the requirements of EN 13813 class CT-C25-F6.

Cement and aggregate based.

9 months from date of manufacture if stored correctly.

Store properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C.

2.03 kg/L ± 0.03 (fresh mortar).

> 25 N/mm² (after 28 days / +20 °C) (EN 13892-2).

F6 N/mm² (after 28 days / +20 °C) (EN 13892-2).

Suitable for use with underfloor heating systems (not for embedment).

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Featheredge to 6 mm.

< 75% max.

+5 °C min / +35 °C max.

20 minutes in conditions of +23 °C / 50% r.h.
The temperature will affect the pot life. Application at temperatures above
+23 °C will reduce the pot life and the working time. Temperatures below
+23 °C will increase the pot life and extend the working time.

At +20 °C and 50% relative humidity:
Foot traffic 2-4 hours.
Cover ~8 hours.

Times are approximate and at +23 °C and 50% r.h. and thus will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity. When overcoating Sikafloor®-125 Level Flex always ensure the moisture content has achieved the required value for the coating product, as the waiting time will vary with the application thickness and ambient humidity (refer to the top coat product data sheet).

Lightly serviceable ~ 24 hours.
Fully serviceable ~ 7 days.
Note: Times are approximate and will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity.

20 kg will cover approx. 4 m² at 3 mm thickness. This figure may vary due to surface area, porosity, surface profile, variations in level or wastage etc.

The concrete/screed should be at least 28 days old. The surface must be dry, clean, structurally sound and posses an effective damp proof membrane. The surface should be free from residual adhesives, oil, grease, wax, loose flaky paint, dust, laitance etc. that could reduce adhesion. Beware of condensation - the substrate and screed floor must be at least 3 °C above dew point to reduce the risk of condensation, blooming or cement laitance on the floor finish. Switch off underfloor heating 24 hours before, and for 24 hours after, application. Ensure floor temperature is >+5 °C. If in doubt apply a test area first.

PRIMING

Weak concrete must be removed and surface defects such as blowholes and voids must be fully exposed. Repairs to the substrate must be carried out using appropriate products such as Sika® concrete repair mortars. Suitable for small areas of interior timber floors only - timber floors must be securely screwed down at 300 mm centres. In all cases, apply SikaBond® PVA+ to the floor at a 1: 0.5 dilution with water and allow to become tacky before applying levelling compound.

Please note: We recommend the use of Sikafloor®-440 Fibre Reinforced for use over large areas of internal timber floors. For further substrate advice, please contact Sika Technical Department.
 

Normal Absorbent Concrete/Screed
These substrates do not normally require priming. Damp down floor with clean water without leaving puddles and allow to surface dry. If water is absorbed immediately into substrate, treat as porous surface.
Porous Concrete/Screed
All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and/or vacuum. Seal surface with SikaBond® PVA+ (1 part PVA to 4 parts clean water) ensuring surface is well coated, then allow to dry. For highly porous substrates it may be necessary to apply more than one coat to prevent pinholes and cracking/debonding of Sikafloor®-125 Level Flex.
Non Porous/Dense Substrates (quarry/ceramic tiles, terrazzo and smooth concrete etc.)
Mechanically roughen surfaces by grinding or scarifying to provide a mechanical key - specialist advice and machinery may be required. Alternatively, apply a bonding coat of undiluted SikaBond® PVA+ and allow to become tacky before applying the levelling compound.

Sikafloor®-125 Level Flex will require 3.4 - 3.5 litres of clean water. Always add the powder to the water. Mix in a suitable clean container using a mechanical mixer with a spiral mixing paddle at slow speed until fully mixed and a smooth consistency achieved. Occasionally during hot weather the product may require remixing during the 15 - 20 minute pot life to reactivate the self-levelling characteristics. Do NOT add extra water. Discard any unused material after 20 minutes from initial mixing. If the product starts to stiffen or set DO NOT try to remix or add extra water.

Mixing Time
Mix thoroughly for a minimum of 3 minutes.
Mixing Tools
Use an electric stirrer (< 500 rpm).

Sikafloor®-125 Level Flex can be applied from a maximum thickness of 6 mm down to a featheredge. Pour the mixed product onto the floor and spread evenly with a steel trowel to form a thin, tight scrape coat within working time. Immediately add further quantities of mixed product to leave a smooth finish (if not, trowel again when the surface is still damp but firm to the touch). If required use a spiked roller, within working time, to provide a more uniform surface appearance. Additional layers, each not exceeding 6 mm, may be applied to achieve the required depth. Prime with Sika Bond^® PVA+ diluted 1:3 with water between layers.

In warm weather, mist spraying onto the surface should be used to compensate for moisture loss and to eliminate drying shrinkage cracking.
Eliminate any through draughts which can cause moisture loss.

All tools and equipment should be cleaned immediately with water before the levelling compound hardens.