Product Data Sheet Show all documents

Sikaflex®-406 KC

POLYURETHANE SELF-LEVELLING HIGH PERFORMANCE BOOSTER ACCELERATED SEALANT

Sikaflex®-406 KC is a 1-part self-levelling booster accelerated elastic floor joint sealant with high mechanical and chemical resistance. Rapid and homogeneous curing throughout the entire sealant is achieved by the addition of the Sikaflex®-406 KC Booster. Sikaflex®-406 KC is especially designed for elastic joint sealing between rails, adjacent surfaces and with Icosit KC products.

  • Movement capability ±25 %
  • Low stress on joint edges
  • Very high mechanical and chemical resistance e.g. to diesel and jet fuel
  • Recessed and broadcasted joints can be opened to traffic after 3 hours
Product Data Sheet Show all documents

Usage

  • Connection joints between steel, defined asphalt types, concrete, granite, rails in track superstructure, roads and floors.
  • Movement joints in road and airport pavements, pedestrian and traffic areas and other situations where early exposure to traffic is required.
 

Advantages

  • Movement capability ±25 %
  • Low stress on joint edges
  • Very high mechanical and chemical resistance e.g. to diesel and jet fuel
  • Recessed and broadcasted joints can be opened to traffic after 3 hours

Packaging

Sikaflex®-406 KC

Container: 10 l

Sikaflex®-406 KC Booster

150 ml foil pack

45 foil packs per box

Colour

Black

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • CE Marking and Declaration of Performance to EN 15651-4 - Sealants for non-structural use in joints in buildings - Sealants for pedestrian walkways
  • CE Marking and Declaration of Performance to EN 14188-2 - Joint fillers and sealants – Part 2: Specifications for cold applied sealants

  • Performance Test DIN EN 15651-4:2012-09, Sikaflex®-406 KC, SKZ, Test report No. 131282/18-ll

  • Testing of Properties DIN EN 14188-2:2005-03, Sikaflex®-406 KC, SKZ, Test report No. 131282/18-l
Product Information

Product Declaration

PW EXT-INT CC

(EN 15651-4)

EN 14188-2

Chemical Base

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

Shelf Life

Sikaflex®-406 KC

12 months from date of

production

Sikaflex®-406 KC Booster

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 +5 °C and +25 °C. Always refer to packaging.

Density

Sikaflex®-406 KC

~1.40 kg/l

Sikaflex®-406 KC Booster

~1.15 kg/l

Mixed

~1.40 kg/l
Technical Information

Shore A Hardness

~28 (after 28 days) with Sikaflex®-406 KC Booster

(ISO 868)

~16 (after 8 hours) with Sikaflex®-406 KC Booster

(ISO 868)

Secant Tensile Modulus

~0,45 N/mm2 at 100 % elongation (23 °C)

with Sikaflex®-406 KC Booster

(ISO 8339)

Movement Capability

±25 % with Sikaflex®-406 KC Booster

(ISO 9047)

±35 % with Sikaflex®-406 KC Booster

(EN 14188-2)

Elastic Recovery

~90 % with Sikaflex®-406 KC Booster

(ISO 7389)

Tear Propagation Resistance

~8.0 N/mm2 with Sikaflex®-406 KC Booster

(ISO 34)

Service Temperature

-40 °C to +80 °C

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, see test report EN 14188-2 from SKZ)

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.

Joint Design

Movement joints in floors and pavements refer to Sika® Method Statement: Sealing of Floor and Specialty Joints

Rail connection joints refer to Sika® Method Statement: Sealing of Rail and Tram Tracks

Application

Application Information

Mixing Ratio

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

Ambient Air Temperature

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

Substrate Temperature

+5 °C to +40 °C

Backing Material

Movement joints in floors and pavements refer to Sika® Method Statement: Sealing of Floor and Specialty Joints

Rail connection joints refer to Sika® Method Statement: Sealing of rails in track superstructure

Pot Life

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

 

Curing Time

~24 hours to reach full mechanical properties with Sikaflex®-406 KC Booster.

When the surface is broadcast with quartz sand, recessed joints can be trafficable by rubber car tyres after approx. 2 hours (+23 °C/50 % r.h). 

Tack free after approx. 3.5 hours (+23 °C/50 % r.h) when used with Sikaflex®-406 KC Booster.

Tack Free Time

Without sand

~3.5 hours (+23 °C)

With sand

~1 hour (+23 °C)
Consumption

Consumption

Movement joints in floors and pavements refer to Sika® Method Statement: Sealing of Floor and Specialty Joints Method Statement Road and Pavement Joints.

Rail connection joints refer to Sika® Method Statement: Sealing of rails in track superstructure
Application steps

SUBSTRATE PREPARATION

The substrate must be clean, dry (concrete: damp / wet / 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 and critical, high performance applications, such as rail connection joints, highly stressed joints, extreme weather exposure or water immersion, the following priming and/or pre-treatment procedures must be followed:

Concrete, steel, stainless steel and asphalt (acc. to EN 13108-1 and EN 13108-6)

Fresh cut asphalt must have a bonding surface with minimum 50 % exposed aggregate and must be primed using Sika® Primer-115 or Sika® Primer-3 N. For more details such as application and flash-off times, refer to the most recent Product Data Sheet of the respective pretreatment product.

Damp or green concrete

Must be primed with Sikadur®-32 Normal, refer to Product Data Sheet. For more detailed information especially before using Sikaflex®-406 KC on asphalt, rubber or EPDM, contact local Sika Technical Services.

Note: Primers and activators are adhesion promoters and not an alternative to improve poor preparation / cleaning of the joint surface. Primers also improve the long term adhesion performance of the sealed joint.

Refer also to the following documents:

  • Sika® Method Statement - Joint Sealing of Rails in Track Superstructures with Sikaflex®-406 KC
  • Sika® Method Statement - Joint Sealing of Road and Pavement Joints with Sikaflex®-406 KC

MIXING

For mixing an electric stirrer with a U-shaped stirring paddle (~600 r/min) must be used. Before adding the Sikaflex®-406 KC Booster the material should be premixed of about 60–90 seconds depending on the material temperature. Add Sikaflex®-406 KC 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 TOOLS

Clean all tools and application equipment with Sika® Remover-208 immediately after use. Hardened material can only be removed mechanically. For cleaning skin, use Sika® Cleaning Wipes-100

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