Sikafloor-161 HC

Sikafloor-161 HC | Multipurpose epoxy primer and binder for levelling screeds and mortars
Product Category: Epoxy Primer & Binder
Brand: Sika
Model Code: Sikafloor®-161 HC
Description
Sikafloor®-161 HC is a 2-component, low-viscosity epoxy resin used as a primer, bonding bridge, and binder for flooring systems, levelling mortars, and screeds. It provides excellent penetration, strong adhesion, and high mechanical performance.
Applications
Primer for concrete and cement screeds
Epoxy flooring systems base layer
Binder for levelling mortars and screeds
Intermediate layer for epoxy flooring systems
Repair mortar and resin screed systems
Compatible Systems
Sikafloor®-263 SL HC
Sikafloor®-264 HC
Key Features
Low viscosity → deep penetration
Excellent bond strength
Solvent-free
Easy application
Short waiting time
Multi-purpose (primer + binder)
Suitable for low to medium absorbent substrates
Product Information
Type: 2-component epoxy resin
Composition: Epoxy
Packaging
10 kg and 20 kg sets (A+B)
Large drums available
Components
Part A: Resin (brownish transparent liquid)
Part B: Hardener (clear liquid)
Shelf Life
24 months
Storage
+18°C to +30°C
Dry, sealed packaging
Density
Mixed: ~1.4 kg/L
Technical Data
Compressive Strength: ~60 N/mm²
Flexural Strength: ~30 N/mm²
Adhesion Strength: >1.5 N/mm² (concrete failure)
Shore D Hardness: ~76
Chemical Resistance
Resistant to many chemicals (consult detailed chart if needed)
Mixing Ratio
Part A : Part B = 79 : 21 (by weight)
Consumption Guide
Primer
0.35 – 0.55 kg/m²
Bonding Bridge
0.3 – 0.5 kg/m²
Levelling Mortar
Mix: 1 part resin + 0.5 part sand
Consumption: ~1.7 kg/m²/mm
Resin Screed / Repair Mortar
Mix: 1 part resin + 8 parts sand
Consumption: ~2.2 kg/m²/mm
Application Conditions
Temperature: +10°C to +30°C
Humidity: ≤80%
Substrate moisture: <4%
≥3°C above dew point
Working Time (Pot Life)
Temperature
Time
+10°C
~50 min
+20°C
~25 min
+30°C
~15 min
Curing & Overcoating Time
Before next layer
Temperature
Min
Max
+10°C
24 h
4 d
+20°C
12 h
2 d
+30°C
8 h
24 h
Ready for Use
Temperature
Foot Traffic
Full Cure
+20°C
~12 h
~7 days
Layer Thickness
Top coat: 70 – 140 microns
Standalone coating: 140 – 275 microns
Substrate Requirements
Concrete strength: ≥25 N/mm²
Pull-off strength: ≥1.5 N/mm²
Surface must be:
Clean
Dry
Free from oil, grease, dust
Surface Preparation
Mechanical preparation (grinding / blasting)
Remove weak concrete and laitance
Repair cracks and voids
Vacuum dust before application
Application Method
Mixing
Mix Part A (~30 sec)
Add Part B
Mix ~3 minutes
Transfer to new container and remix
Primer Application
Pour material onto surface
Apply with roller or squeegee
Back-roll for even coverage
Maintain wet edge
Mortar / Screed
Mix resin + aggregates
Apply wet-on-wet over primer
Spread and compact
Finish with trowel
Important Notes
Protect from moisture for first 24 hours
Apply during falling temperature (avoid pinholes)
Not suitable for direct water exposure unless sealed
Close pinholes before next layer
Performance Advantages
Strong bonding base for flooring systems
High mechanical strength
Durable and chemical resistant
Suitable for industrial flooring
Professional-grade system component
Cleaning
Use Thinner C
Hardened material → mechanical removal
Safety & Handling
Follow SDS guidelines
Use PPE
Apply by experienced professionals
Additional Notes
Lab-tested values
Site conditions may affect performance
Local regulations may vary
Summary
Sikafloor®-161 HC is a high-performance epoxy primer and binder, providing excellent adhesion, durability, and mechanical strength, making it essential for industrial flooring systems, screeds, and repair applications.