Sikadur®-120 LM

Conforms to the requirements of BS EN 1504-4
DoP 58052556, certified by Factory Production Control Body 1139 and provided with the CE mark

Methane Permeability Testing to ISO 15105-1, Report No. LR2531, issued by Versaperm

Epoxy resin with specialist fillers

24 months from date of production

Sikadur®-120 LM must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to the packaging and current Safety Data Sheet for information on safe handling and storage.

NOTE: Gas Transmission Rate (GTR) of 7.43 ml.mm/m2.day is an average of three readings.

Beware of condensation. The substrate and uncured applied Product must be at least +3 °C above the dew point to reduce the risk of condensation or blooming on the surface of the applied product. Low temperatures and high humidity conditions increase the probability of blooming.

The substrate must be dry or matt damp, with no standing water.

Please note

• Pot life begins when the resin and hardener are mixed.
• Pot life is shorter at high temperatures and longer at low temperatures.
• The greater the quantity of product mixed, the shorter the pot life.
• Apply the following methods for obtaining a longer pot life at high temperatures: 1. Divide the mixed product into smaller quantities. 2. Cool down parts A and B before mixing. Do not cool below +5 °C

Maximum waiting time for 'wet-on-wet' application:

If the maximum waiting time is exceeded, remove the product before applying any further material and prepare the substrate appropriately. NOTE: Times are approximate and will be affected by changing ambient and substrate conditions.

~1.2 - 1.4 kg/m² per mm of thickness.

NOTE: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply the Product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.

Concrete and cementitious substrates must be older than 28 days, depending on any minimum strength requirements. Cementitious substrates must be structurally sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum tensile strength of 1.5 N/mm2. The substrate must be sound, clean, free from all contaminants such as dirt, oil, grease, loose friable material, cement laitance, coatings and other surface treatments.

For the application of Sikadur-120 LM, prepare concrete and cementitious substrates to a minimum substrate roughness of 0.5 mm according to EN 1766 or ≥CSP 3 (International Concrete Repair Institute) or equivalent.

1. Remove weak cementitious substrates and contaminants such as dirt, grease and oil.

2. IMPORTANT: The final texture of the substrate must be open-textured and gripping. Prepare cementitious substrates mechanically using abrasive blast cleaning, planing or scarifying equipment to remove cement laitance.

3. Pre-fill any surface voids with the SikaTop-586 Seal in order to avoid excess thicknesses of the coating in local areas.

4. Before applying the Product, remove all dust, loose and friable material from the application surface with an industrial vacuuming equipment.

5. For critical adhesion applications, perform preliminary site trials incorporating adhesion pull-off tests to confirm that substrate and Product tensile adhesion strengths are acceptable for the application.

1. IMPORTANT: Mix full units only. Mix part A (resin) separately using a low-speed single-paddle electric stirrer (300–400 rpm) to mix liquid and all coloured pigment until the mixture achieves a uniform colour.

2. Add part B (hardener) to part A and mix both parts continuously for 3 minutes until the mixture achieves a uniform colour.

3. IMPORTANT: Avoid over-mixing to minimise air entrainment. Pour the materials into a clean container and mix again for at least 1 minute to achieve a consistent mix and to ensure thorough mixing. NOTE: Total mixing time is 4 minutes.

4. Scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.

Apply the mixed Sikadur®-120 LM to the prepared surface by brush, roller or with a trowel. Ensure uniform and complete coverage. On hardened concrete substrates mechanically prepared to receive fresh concrete, always apply by brush and work the material well into the substrate. For applications where ground gasses are present, 2 x 1 mm coatings should be installed.

Clean all tools and application equipment with Sika® Thinner C immediately after use. Hardened / cured material can only be mechanically removed.