Sika® Icosit® KC 340/4
Sika® Icosit® KC 340/4 is a flexible two-part polymer grout based on polyurethane resin. It is designed as a vibration absorbing, load-bearing, flexible grout for the precision alignment of rails, turnouts / switches, etc. Sika® Icosit® KC 340/4 is also used for fixing track components to rigid substrates such as concrete slabs, steel bridge decks and tunnel invert slabs.
- Medium axle loads of trams and light-rail vehicles.
- Noise and vibration suppression.
- Reduces erosion of concrete under baseplate.
- More uniform load distribution into substructure.
- Watertight undersealing.
- Flexible, elastic (shore A 65).
- Damping, compressible.
- Good electrical insulation against stray currents.
- No stress peaks on anchor bolts.
- Excellent adhesion on various substrates.
- Levels out tolerances.
- Suitable as a powerful, shear-resistant adhesive.
- Absorbs dynamic stresses and prolongs the life of concrete substructure.
- Insensitive to moisture.
- Long durability, less maintenance.
Usage
As a noise and vibration reducing grout under discrete baseplates of tramway or light rail track sections.Advantages
- Medium axle loads of trams and light-rail vehicles.
- Noise and vibration suppression.
- Reduces erosion of concrete under baseplate.
- More uniform load distribution into substructure.
- Watertight undersealing.
- Flexible, elastic (shore A 65).
- Damping, compressible.
- Good electrical insulation against stray currents.
- No stress peaks on anchor bolts.
- Excellent adhesion on various substrates.
- Levels out tolerances.
- Suitable as a powerful, shear-resistant adhesive.
- Absorbs dynamic stresses and prolongs the life of concrete substructure.
- Insensitive to moisture.
- Long durability, less maintenance.
Packaging
| Part A | 5,46 kg container |
| Part B | 0,54 kg container |
| A+B | 6 kg |
Refer to current price list for packaging variations.
Colour
Black
Product Details
Chemical Base
2-part polyurethane grout
Shelf Life
12 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 +10 °C and +25 °C. Always refer to packaging.
Density
| Part A | ~1 kg/l |
| Part B | ~1,2 kg/l |
| A + B | ~1 kg/l |
System Structure
- Sika® Icosit® KC 340/4
- Sikadur®-32+: For 'green' and wet concrete
- Icosit® KC 330 Primer
Shore A Hardness
| 65 ± 5 (after 28 days) | (ISO 868) |
Shore hardness assists with material identification and assessing the curing progress on site.
Compressive stiffness
Load-Deflection Diagram
Static stiffness determined according to DIN 45673-1.
Dimensions of test specimen 360 × 160 × 25 mm;
Spring index kstat = 29 kN/mm, determined as per the secant method between 8 and 32 kN.
Tensile Strength
| ~2,6 N/mm2 | (ISO 527) |
Electrical Resistivity
| ~1,22 × 109 Ω·m | (DIN VDE 0100-610 and IEC 93) |
Service Temperature
-40 °C minimum / +80 °C maximum
short term +150 °C maximum
Chemical Resistance
Long-term resistant against:
- Water
- Most detergents
- Sea water
Temporary resistant against:
- Mineral oils, diesel fuel
Short-term or no resistance against:
- Organic solvents (ester, ketone , aromates) and alcohol
- Concentrated acids and lyes
Contact Sika® Technical Services for specific information.
Application
Mixing Ratio
Part A : Part B = 100 : 10 (parts by weight)
Layer Thickness
15 mm minimum
60 mm maximum
Product Temperature
Condition product parts before application preferably at ~+15 °C to assist with flow and curing speed
Ambient Air Temperature
+5 °C minimum / +35 °C maximum
Relative Air Humidity
90 % maximum
Substrate Temperature
+5 °C minimum / +35 °C maximum
Substrate Moisture Content
Dry to matt damp
Pot Life
~11 minutes at +20 °C
After this time, the mixture becomes unusable.
Higher temperatures will shorten pot life.
Curing Time
Tack-free ~2 hours at +20 °C
Trafficable ~12 hours at +20 °C
Curing Rate
| Shore A Hardness Values at Different Curing Temperatures | ||||
| Curing Time | 0 °C | 5 °C | 23 °C | 35 °C |
| 1 Hour | - | - | ~20 | |
| 2 Hours | - | - | ~20 | ~35 |
| 4 Hours | - | ~15 | ~30 | ~40 |
| 7 Hours | ~25 | ~25 | ~40 | ~50 |
| 1 Day | ~40 | ~40 | ~50 | ~55 |
| 2 Days | ~45 | ~45 | ~55 | ~60 |
| 3 Days | ~50 | ~50 | ~60 | ~60 |
| 7 Days | ~55 | ~55 | ~60 | ~60 |
| 14 Days | ~55 | ~55 | ~60 | ~60 |
Waiting Time / Overcoating
On primer or coating at +20 °C
| Minimum | Maximum | |
| Icosit® KC 330 Primer | 1 hour | 3 days |
| Sikadur®-32+ | 24 hours | 7 days |
Consumption
~1 kg per litre of volume to be sealed
SUBSTRATE QUALITY
Substrate must be sound, free from oil, grease, loose and friable particles.
Slightly damp substrates are acceptable. Standing water must be removed (e.g. by vacuum extraction or oil free compressed air) before pouring Sika® Icosit® KC 340/4.
SUBSTRATE PREPARATION
To improve adhesion, apply Icosit® KC 330 Primer as a primer on absorbent substrates (concrete).
Note: Refer to the individual Product Data Sheet for more information.
MIXING
Icosit KC 340/4 is supplied in pre-weighed composite units consisting of parts A + B. Part A must be stirred thoroughly before being mixed with part B.
6 kg units
The following mixing instructions must be adhered to:
- Use an electric or pneumatic mixer with basket type stirrer or helical stirrer, diameter 120–140 mm, speed ~600–800 rpm.
- Mixing time ~60 to 80 seconds
- Ensure material is mixed from the container walls and the base by the stirrer during mixing.
CLEANING OF TOOLS
Mixing and application tools must be cleaned at regular intervals and immediately after use with Sika® Thinner C. Cured material can only be removed mechanically.