Product Data Sheet Show all documents

Sikaflex®-406 KC

POLYURETHANE SELF-LEVELLING ELASTIC RAIL JOINT SEALANT WITH ACCELERATED
BOOSTER CURING

Sikaflex®-406 KC is a 1-component, self-levelling, elastic rail joint sealant for use in road and track construction. Rapid, accelerated and homogeneous curing throughout the entire sealant is achieved by the addition of the Sikaflex®-406 KC Booster.

  • Fast curing: Recessed and broadcasted joints can be opened to traffic after 3 hours (depending on temperature)
  • Very high mechanical and chemical resistance
  • Movement capability ±25 %
  • Low stress on joint edges
  • Self-levelling
  • Easy application
Product Data Sheet Show all documents

Usage

Connection joints between steel, defined asphalt types, concrete, granite and rails in track and road construction where early exposure to traffic is required.  

Advantages

  • Fast curing: Recessed and broadcasted joints can be opened to traffic after 3 hours (depending on temperature)
  • Very high mechanical and chemical resistance
  • Movement capability ±25 %
  • Low stress on joint edges
  • Self-levelling
  • Easy application

Packaging

Sikaflex®-406 KC

Container: 10 l

Sikaflex®-406 KC Booster

150 ml foil pack

Colour

Black, concrete grey

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

  • CE-Marking to DIN EN 14188-2
  • CE-Marking to DIN EN 15651-4
Product Information

Composition

i-Cure® Technology polyurethane accelerated with
Sika® Booster-Technology

Shelf life

Sikaflex®-406 KC

15 months from date of production

Sikaflex®-406 KC Booster

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 +25 °C.
Always refer to packaging.

Density

Sikaflex®-406 KC

~1.4 kg/l

Sikaflex®-406 KC Booster

~1.2 kg/l

 
Technical Information

Shore A hardness

~15after 24 h
~28after 28 d

Secant tensile modulus

~0.45 N/mm2 *

+23 °C

~0.80 N/mm2 *

-20 °C

* at 100 % elongation

Elastic recovery

~90 %

(ISO 7389)

Tear propagation resistance

~8 N/mm2

(ISO 34)

Movement capability

±25 %

(ISO 9047)

±35 %

(EN 14188-2)

Chemical resistance

Resistant to water, seawater, diluted alkalis, cement slurry and water
dispersed detergent and temporary resistant to diesel, oil and
jet fuel (EN 14187-6)

Sikaflex®-406 KC is not resistant to alcohols, organic acids, concentrated alkalis and concentrated acids as well as hydrocarbons besides the above mentioned. Contact Sika Technical Services for additional information.

Service temperature

-40 °C to +80 °C

Application

Application Information

Mixing ratio

Sikaflex®-406 KC : Sikaflex®-406 KC Booster = 100 : 1.5 Vol.-%

Backing material

Filler block

Ambient air temperature

+5 °C to +40 °C

Substrate temperature

+5 °C to +40 °C, min. 3 °C above dew point

Pot Life

~20 min. (+23 °C / 50 % r.h.) with Sikaflex®-406 KC Booster

Curing time

~24 hours with Sikaflex®-406 KC Booster.

When the surface is broadcast with quartz sand, recessed joints can be trafficable by rubber car tyres after approx. 3 hours (+23 °C/50 % r.h). 

Tack free time

Without sand

~3.5 hours (+23 °C)

With sand

~1 hour (+23 °C)

 
Consumption

Consumption

~1.4 kg/l (mixed material)

Refer to Method Statement for further details.
Application steps

SUBSTRATE PREPARATION

The substrate and the joint edges must be sufficiently load-bearing, clean, dry, sound and free from oils, grease, dust, laitance and loose or friable particles. All dust, loose and friable material must be completely removed from all surfaces before application of any activators, primers or sealant.

 

For optimum adhesion, pre-treat with Sika® Primer-115 or Sika® Primer-3 N in advance.

 

Refer to Method Statement for further details.

MIXING

For mixing an electric stirrer with a U-shaped stirring paddle (demand min. 1000 W, speed ~600 r/min) must be used. Before adding the Sikaflex®-406 KC Booster the material should be premixed thoroughly. Add the Booster to Sikaflex®-406 KC and mix continuously for 2 to 3 minutes until a uniformly coloured mix has been achieved. Over mixing must be avoided to minimise air entrainment.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with Sika® Remover-208 or Sika® Colma Cleaner immediately after use. Hardened material can only be removed mechanically.

 

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