Description USES Sikafloor®-155 WN should only be applied by experienced professionals. It is used for: Priming and improving adhesion on properly prepared surfaces such as: New concrete Cementitious screeds Hardened concrete Existing epoxy floor coatings EpoCem leveling layers Priming for Sikafloor®-81 EpoCem® and Sikafloor®-82 EpoCem®, Sikafloor®-20N PurCem®, Sikafloor®-21N PurCem®, and other products in the Sikafloor®-Level® range. CHARACTERISTICS / ADVANTAGES Simple and fast to apply Ideal for highly absorbent substrates Water-based and odorless Can be used in unventilated areas Excellent bond strength across a wide temperature range Environmentally friendly APPROVALS / STANDARDS Certified as synthetic resin screed material under EN 13813:2002 with CE marking. PRODUCT INFORMATION Chemical Base: Water-based epoxy Packaging: Part A: 7.5 kg containers Part B: 2.5 kg containers Ready-to-mix units: 10 kg, 30 kg Appearance / Colour: Part A: Thick colored paste Part B: Light yellow translucent emulsion Mixed Resin: Oxide red (~ RAL 3009) Shelf Life: 12 months from the production date Storage Conditions: Store in original, sealed packaging, in dry conditions, at temperatures between 5°C and 30°C Density: Part A: ~1.6 kg/l Part B: ~1.1 kg/l Mixed resin: ~1.4 kg/l Solid Content: By weight: ~70% By volume: ~56% Viscosity: 4,900 mPa·s ( 20 °C) TECHNICAL INFORMATION Tensile Adhesion Strength: >1.5 N/mm² (failure in concrete) after 28 days at 23 °C and 50% r.h. (EN 13892-8) SYSTEM INFORMATION Application: Apply 1 to 2 coats of Sikafloor®-155 WN, depending on substrate porosity. APPLICATION INFORMATION Mixing Ratio: Part A : Part B = 3 : 1 by weight Consumption: 0.3 – 0.5 kg/m² per coat (2.0 – 3.3 m²/kg per coat) Dilute first coat with 10% water by weight, apply second coat undiluted Layer Thickness: 110 – 180 µm per coat (dry film thickness) Ambient Temperature: Minimum 10 °C, maximum 35 °C Relative Humidity: Maximum 85% Dew Point: Ensure substrate and uncured floor are at least 3°C above the dew point to prevent condensation or blooming. Substrate Temperature: Minimum 10 °C, maximum 35 °C Substrate Moisture Content: Test using Sika®-Tramex meter, CM measurement, or Oven-dry method. Ensure moisture is below 4% for impervious resin finishes. Can be applied on damp green concrete when overcoating with Sikafloor® EpoCem® products, provided there is no standing water. Pot Life (at 75% relative humidity): 10°C: ~180 minutes 20°C: ~90 minutes 30°C: ~90 minutes Curing Time (before applying Sikafloor®-81/-82 EpoCem®): Substrate Temperature: 10°C: Minimum 12 hours, maximum 72 hours 20°C: Minimum 6 hours, maximum 48 hours 30°C: Minimum 4 hours, maximum 24 hours Foot Traffic: 10°C: ~12 hours 20°C: ~6 hours 30°C: ~4 hours Note: Curing times increase in low temperatures or high humidity. Only apply subsequent coats when the primer is tack-free.
