Sikafloor®-156
Epoxy primer, levelling mortar and mortar screed
Sikafloor®-156 is a 2-part, low viscosity, multipurpose, epoxy resin which can be used as an epoxy primer, levelling mortar and mortar screed. Internal and external use.
- Low viscosity
- Good penetration ability
- High bond strength
- Short waiting times
- Multi-purpose
Usage
- Priming concrete substrates, cement screeds and epoxy mortars
- For normal to strongly absorbent substrates
- Primer for all Sika Epoxy and PUR floorings
- Binder for levelling mortars and mortar screeds
- For internal and external use
Advantages
- Low viscosity
- Good penetration ability
- High bond strength
- Short waiting times
- Multi-purpose
Packaging
| Part A | 1,875 kg, 7,5 kg and 18,75 kg containers |
| Part B | 0,625 kg, 2,5 kg and 6,25 kg containers |
| Part A+B | 2,5 kg and 10 kg unipacks 25 kg ready to mix unit |
| Part A | 180 kg and 1000 kg drums |
| Part B | 60 kg, 180 kg and 1000 kg drums |
Refer to current price list for packaging variations.
Colour
| Part A | transparent, liquid |
| Part B | brownish, liquid |
Product Details
SUSTAINABILITY
- Conformity with LEED v4 MRc 2 (Option 1): Building Product Disclosure and Optimization – Environmental Product Declarations
- Conformity with LEED v4 MRc 4 (Option 2): Building Product Disclosure and Optimization - Material Ingredients
- Conformity with LEED v2009 IEQc 4.2: Low-Emitting Materials - Paints and Coatings
- IBU Environmental Product Declaration (EPD)
- VOC emission certificate according to AgBB and DIBt approval requirements, reference to classification / test report No. G18790
APPROVALS / CERTIFICATES
- CE Marking and Declaration of Performance to EN 1504-2 - Surface protection product for concrete - Coating
- CE Marking and Declaration of Performance to EN 13813 - Resin screed material for internal use in building
Composition
Epoxy
Shelf life
24 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
| Part A | ~1,10 kg /l |
| Part B | ~1,02 kg /l |
| Mixed resin | ~1,1 kg /l |
All density values at 23 °C.
Solid content by weight
~100 %
Solid content by volume
~100 %
Shore D Hardness
| ~79 (7 days / +23 °C / 50 % r.h.) | (DIN 53505) |
Compressive strength
| ~55 N/mm2 (Mortar, 30 days / +23 °C / 50 % r.h.) | (EN 196-1) |
Mortar screed: Sikafloor®-156 mixed 1:10 with suitable sand mixture, refer to "Systems"
Tensile strength in flexure
| ~15 N/mm2 (Mortar, 30 days / +23 °C / 50 % r.h.) | (EN 196-1) |
Mortar screed: Sikafloor®-156 mixed 1:10 with suitable sand mixture, refer to "Systems"
Tensile adhesion strength
| >1.5 N/mm2 (failure in concrete) | (EN 4624) |
Application
Mixing ratio
Part A : Part B = 75 : 25 (by weight)
Ambient air temperature
+10 °C min. / +30 °C max.
Relative air humidity
80 % max.
Dew point
Beware of condensation.
The substrate and uncured applied floor material must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the floor finish. Low temperatures and high humidity conditions increase the probability of blooming.
Substrate temperature
+10 °C min. / +30 °C max.
Substrate moisture content
≤ 4 % parts by weight
Test method: Sika®-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot Life
| Temperature | Time |
| +10 °C | ~60 minutes |
| +20 °C | ~30 minutes |
| +30 °C | ~15 minutes |
Curing time
Before applying non-solvent based products on Sikafloor®-156 allow:
| Substrate temperature | Minimum | Maximum |
| +10 °C | 24 hours | 4 days |
| +20 °C | 12 hours | 2 days |
| +30 °C | 8 hours | 24 hours |
Before applying solvent based products on Sikafloor®-156 allow:
| Substrate temperature | Minimum | Maximum |
| +10 °C | 36 hours | 6 days |
| +20 °C | 24 hours | 4 days |
| +30 °C | 12 hours | 2 days |
Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Consumption
| Coating System | Product | Consumption |
| Priming | 1–2 × Sikafloor®-156 | 1–2 × 0,30–0,50 kg/m² |
| Levelling mortar fine (surface roughness < 1 mm) | 1 pbw Sikafloor®-156 + 0,5 pbw quartz sand (0,1–0,3 mm) + 0,015 pbw Extender T | 1,4 kg/m²/mm |
| Levelling mortar medium (surface roughness up to 2 mm) | 1 pbw Sikafloor®-156 + 1 pbw quartz sand (0,1–0.,3 mm) + 0,015 pbw Extender T | 1,6 kg/m²/mm |
| Bonding bridge | 1–2 × Sikafloor®-156 | 1–2 × 0,3–0,5 kg/m² |
| Epoxy screed / Repair Mortar (15–20 mm layer thickness ) | 1 pbw Sikafloor®-156 + 10 pbw quartz sand | 2,2 kg/m²/mm |
These figures are theoretical and do not allow for any additional material required due to surface porosity, surface profile, variations in level or wastage etc.
MIXING
Prior to mixing all parts, mix separately part A (resin) using a low speed single paddle electric stirrer (300 - 400 rpm). Add part B (hardener) to part A and mix part A + B continuously for 3,0 minutes until a uniform mix has been achieved. When parts A and B have been mixed. Using a double paddle (axis) electric stirrer (>700W), pan type revolving or forced action mixer or other suitable equipment (free fall mixers must not be used). Gradually add the appropriate granulometry of dried quartz sand and if required Extender T. Mix for a further 2,0 minutes until a uniform mix has been achieved. To ensure thorough mixing pour materials into another container and mix again to achieve a smooth consistent mix. Excessive mixing must be avoided to minimise air entrainment. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing. Mix full units only. Mixing time for A+B+quartz sand = 5,0 minutes.
APPLICATION
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
Prior to application, confirm substrate moisture content, relative air humidity, dew point, substrate, air and product temperatures. If moisture content > 4% parts by weight, Sikafloor® EpoCem® may be applied as a Temporary Moisture Barrier (T.M.B.) system.
Primer
Pour mixed Sikafloor®-156 onto the prepared substrate and apply by brush, roller or squeegee then back roller in two directions at right angles to each other. Ensure a continuous, pore free coat covers the substrate. If necessary, apply two priming coats.
Confirm primer waiting /overcoating time has been achieved before applying subsequent products. Refer to individual primer Product Data Sheet.
Levelling mortar
Apply the levelling mortar by squeegee/trowel to the required thickness.
Bonding bridge
Pour mixed Sikafloor®-156 onto the prepared substrate and apply by brush, roller or squeegee. For epoxy screed, back roller in two directions at right angles to each other. Ensure a continuous, pore free coat covers the substrate. If necessary, apply two priming coats.
Epoxy screed / repair mortar
Apply the repair or screed mortar onto the “tacky” bonding bridge. For the screed, use levelling battens and screed rails as necessary. After a short waiting time, compact and smoothen the mortar with a trowel. For the screed, a teflon coated power float (~20 - 90 rpm) is recommended.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with Thinner C immediately after use. Hardened material can only be removed mechanically.