Name: Sikafloor-161 HC
Brand: Sika
Price: 160.00 USD
Availability: InStock

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Two yellow Sika barrels with a collage of people applying a white substance to a floor.

Sikafloor-161 HC

$160.00

Sikafloor®-161 HC

A 2-part, low viscosity multipurpose epoxy resin for priming and levelling concrete and cementitious substrates. Solvent-free with excellent bond strength and short waiting times. Suitable as a primer, bonding bridge, levelling mortar binder, and intermediate layer for Sikafloor®-263 SL HC and Sikafloor®-264 HC flooring systems.

Overview

Specifications

Property	Value
Type	2-component low viscosity epoxy resin
Mixing Ratio	Part A : Part B = 79 : 21 (by weight)
Density – Part A	~1.6 kg/L
Density – Part B	~1.0 kg/L
Density – Mixed	~1.4 kg/L
Solid Content	~100% by mass and volume
Shore D Hardness	~76 (7 days at +23°C)
Compressive Strength	~60 N/mm² (28 days at +23°C)
Flexural Strength	~30 N/mm² (28 days at +23°C)
Tensile Adhesion Strength	>1.5 N/mm² (failure in concrete, ISO 4624)
Service Temperature	Max. +60°C short-term (7 days)
Shelf Life	24 months from date of production
Storage	Dry, +18°C to +30°C, original sealed packaging

Usage

Priming concrete substrates, cement screeds, and epoxy mortars
Low to medium absorbent substrates
Primer for 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

Advantages

Low viscosity with good penetration into substrate
Excellent bond strength (>1.5 N/mm²)
Solvent free
Easy application
Short waiting times between coats
Multi-purpose – primer, binder, bonding bridge, and screed
LEED v4 EQ credit compliant – low-emitting materials

Packaging

20 kg set (Part A + Part B)
10 kg set (Part A + Part B)

Colour

Part A (Resin): Brownish-transparent liquid
Part B (Hardener): Transparent liquid

Product Details

Product Information

Property	Detail
Composition	Epoxy (2-component)
Shelf Life	24 months from date of production
Storage Conditions	Dry, +18°C to +30°C, original sealed packaging
Solid Content	~100% by mass and volume

Technical Information

Coating System	Product / Mix	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)	1 pbw Sikafloor®-161 HC + 8 pbw quartz sand	2.2 kg/m²/mm

Pot Life

Temperature	Pot Life
+10°C	~50 minutes
+20°C	~25 minutes
+30°C	~15 minutes

Curing & Ready for Use

Substrate Temp.	Foot Traffic	Light Traffic	Full Cure
+10°C	~24 h	~6 days	~10 days
+20°C	~12 h	~4 days	~7 days
+30°C	~8 h	~2 days	~5 days

Application

Application Information

Parameter	Value
Mixing Ratio	Part A : Part B = 79 : 21 (by weight)
Ambient Temperature	+10°C min / +30°C max
Substrate Temperature	+10°C min / +30°C max
Relative Humidity	Max. 80% r.h.
Substrate Moisture	<4% pbw (no rising moisture per ASTM polyethylene sheet test)
Dew Point	Substrate must be min. 3°C above dew point
Layer Thickness (as top coat)	70–140 microns
Layer Thickness (standalone)	140–275 microns

Application Steps

Substrate Requirements: Concrete must have min. compressive strength of 25 N/mm² and pull-off strength ≥1.5 N/mm². Surface must be clean, dry, and free from oil, grease, coatings, and contaminants. Moisture content <4% pbw.
Substrate Preparation: Mechanically prepare using abrasive blast cleaning, planing, scarifying, or grinding to remove laitance. Grind high spots. Vacuum all dust and loose material. Fill cracks, blowholes, and voids with Sikafloor®, Sikadur®, or Sikagard® products.
Primer Mixing: Mix Part A for ~30 seconds. Add Part B to Part A. Mix continuously for ~3 minutes at 300–400 rpm until uniform. Pour into a clean container and mix again. Scrape sides and bottom at least once during final mixing.
Levelling Mortar Mixing: Mix Part A for ~30 seconds. Add Part B. While mixing, gradually add required filler/aggregates. Mix for a further 2 minutes until uniform. Pour into clean container and mix again.
Standard Primer Application: Pour mixed product onto substrate. Spread evenly with short pile roller or squeegee. Back-roll in two directions at right angles with a fleece roller. Maintain a wet edge. If broadcasting, wait 15–30 minutes then broadcast quartz sand to excess. Vacuum loose sand after hardening.
Bonding Bridge: Apply with brush, fleece roller, or squeegee. Back-roll in two directions. Apply second coat if required.
Resin Screed: Pour wet-on-wet onto still-tacky primer. Spread and compact with trowel to required thickness between screed rails. Level with levelling beam. Finish with trowels or power floats.
Cleaning: Clean all tools immediately with Thinner C. Hardened material can only be removed mechanically.