Sikafloor-161 HC Substrate (A/B) is a 2-part, low viscosity multipurpose filled epoxy resin for priming and levelling concrete and cementitious substrates.
Advantages
Low viscosity
Good penetration
Excellent bond strength
Solvent free
Easy application
Short waiting times
Multi-purpose
These are also the feature points displayed in the product-page header.
Usage
For priming concrete substrate, cement screeds and epoxy mortars.
For low to medium absorbent substrates.
Primer for the Sikafloor®-263 SL HC and Sikafloor®-264 HC flooring systems.
Binder for levelling mortars and mortar screeds.
Intermediate layer underneath Sikafloor®-263 SL HC and Sikafloor®-264 HC.
Packaging
Component | Packaging |
Part A | 280 kg drums, 15.8 kg can, 7.9 kg can |
Part B | 200 kg, 4.2 kg can, 2.1 kg can |
Part A+B | 20 kg set and 10 kg set (A+B) |
Colour
Component | Appearance and colour |
Part A – Resin | Liquid, brownish-transparent |
Part B – Hardener | Liquid, transparent |
Sustainability, certificates and test reports
Sustainability: Conforms with LEED v4 EQ credit: low-emitting materials.
Certificates and test reports:
VOC content passes the LEED v4.1 VOC Content requirement. Report no. 392-2022-10179004_XG_EN, Eurofins Product Testing, Denmark, June 2022.
VOC emission passes CDPH. Report no. 392-2022-00179001_H_EN, Eurofins Product Testing, Denmark, May 2022.
Product information
Property | Information |
Composition | Epoxy |
Shelf life | 24 months from date of production if stored properly in original, unopened and undamaged sealed packaging. |
Storage conditions | Store in dry conditions at temperatures between +18 °C and +30 °C. |
Density — Part A | ~1.6 kg/L |
Density — Part B | ~1.0 kg/L |
Density — Mixed Resin | ~1.4 kg/L |
Solid content by mass | ~100% |
Solid content by volume | ~100% |
Technical information
Property | Result |
Shore D Hardness | 7 days at +23 °C: ~76 |
Compressive strength | 28 days at +23 °C: ~60 N/mm² (resin) |
Flexural strength | 28 days at +23 °C: ~30 N/mm² (resin) |
Tensile adhesion strength | >1.5 N/mm², failure in concrete (ISO 4624) |
Chemical resistance | Resistant to many chemicals. Ask for a detailed chemical-resistance table. |
Service temperature
Important — simultaneous mechanical and chemical strain
While the product is exposed to temperatures up to +60 °C, simultaneous mechanical or chemical strain may damage it.
Do not expose the product to chemical or mechanical strain at elevated temperatures.
Short-term exposure, maximum 7 days: +60 °C.
Short-term moist/wet heat* up to +60 °C is permitted where exposure is only occasional, such as steam cleaning.
All specifications above are from the official product page. Sika Cambodia product details
Application information
Mixing ratio
Part A : Part B = 79 : 21 by weight.
Layer thickness
Application | Minimum | Maximum |
As Top Coat | 70 microns | 140 microns |
As stand-alone coating | 140 microns | 275 microns |
Application conditions
Condition | Requirement |
Ambient air temperature | +10 °C min / +30 °C |
Relative air humidity | 80% r.h. max. |
Substrate temperature | +10 °C min / +30 °C |
Substrate moisture content | <4% pbw moisture content |
Dew point
Beware of condensation.
The substrate and uncured floor must be at least 3 °C above the 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 moisture testing
Test using a Sika®-Tramex meter, CM-measurement or Oven-dry-method.
There must be no rising moisture according to ASTM (Polyethylene-sheet).
Pot life
Temperature | Time |
+10 °C | ~50 min |
+20 °C | ~25 min |
+30 °C | ~15 min |
Curing time before solvent-free products
Substrate temperature | Minimum | Maximum |
+10 °C | 24 h | 4 d |
+20 °C | 12 h | 2 d |
+30 °C | 8 h | 24 h |
Curing time before solvent-containing products
Substrate temperature | Minimum | Maximum |
+10 °C | 36 h | 6 d |
+20 °C | 24 h | 4 d |
+30 °C | 16 h | 2 d |
Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.
Applied product ready for use
Substrate temperature | Foot traffic | Light traffic | Full cure |
+10 °C | ~24 h | ~6 d | ~10 d |
+20 °C | ~12 h | ~4 d | ~7 d |
+30 °C | ~8 h | ~2 d | ~5 d |
Times are approximate and will be affected by changing ambient and substrate conditions.
Consumption
Coating system | Product | Consumption |
Priming | Sikafloor®-161 HC | 0.35–0.55 kg/m² |
Levelling mortar / Scratch coat | 1 pbw Sikafloor®-161 HC + 0.5 pbw quartz sand (0.1–0.3 mm) | 1.7 kg/m²/mm |
Bonding bridge | Sikafloor®-161 HC | 0.3–0.5 kg/m² |
Resin screed, 15–20 mm layer thickness / Repair Mortar | 1 pbw Sikafloor®-161 HC + 8 pbw quartz sand by weight | 2.2 kg/m²/mm |
