Sikaflex®-406 KC

• 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.

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

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.

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.

-40 °C to +80 °C

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

Sikaflex®-406 KC : Sikaflex®-406 KC Booster 100 : 1,5 Vol.-%

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

+5 °C to +40 °C

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

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

~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.

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

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

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.

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