Product Data Sheet Show all documents

Sika® Icosit® KC 450/30

Two-component, high-performance, fast-curing, self-levelling polyurethane joint filler

Sika® Icosit® KC 450/30 is an elastic two-part, fast-curing, polyurethane polymer resin joint filler that can be applied by hand or machine. It is used for flexible filling of joints between rails and the surface of the road. It adheres to all sides of the space to be filled and has high mechanical and chemical resistance.

  • High movement capability: ±25 % (EN 15651-4) and ±35 % (EN 14188-2). 
  • Excellent mechanical resistance. 
  • Very good resistance to specific chemicals. 
  • Remains elastic over a very wide temperature range. 
  • Rapid exposure to traffic: recessed and broadcasted joints can be opened to traffic after a few hours. 
  • Low stress on joint flanks. 
  • Suitable for joint widths up to 70 mm. 
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Product Data Sheet Show all documents

Usage

Sika® Icosit® KC 450/30 is used for:
  • Filling of joints between steel, defined asphalt types, concrete, granite, paving stones and rails in road-track superstructure. 
  • Movement joints in roads or other situations where early exposure to traffic is required. 
 

Advantages

  • High movement capability: ±25 % (EN 15651-4) and ±35 % (EN 14188-2). 
  • Excellent mechanical resistance. 
  • Very good resistance to specific chemicals. 
  • Remains elastic over a very wide temperature range. 
  • Rapid exposure to traffic: recessed and broadcasted joints can be opened to traffic after a few hours. 
  • Low stress on joint flanks. 
  • Suitable for joint widths up to 70 mm. 

Packaging

Part A Sika® Icosit® KC 450/30

10 L container

Part B Sika® Icosit® KC 450/30 Booster

150 ml foil packs, 5 per box or 45 per box

Refer to the current price list for available packaging variations.

Colour

Black or concrete grey

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • CE marking and declaration of performance based on EN 15651-4: Sealants for non-structural use in joints in buildings and pedestrian walkways — Part 4: Sealants for pedestrian walkways. 
Product Information

Chemical Base

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

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 +5 °C and +30 °C. Always refer to the packaging.

Refer to the current Safety Data Sheet for information on safe handling and storage.

 

Density

Part A

(1.40 ± 0.1) kg/l

Part B

(1.15 ± 0.1) kg/l

Mixed Product

(1.40 ± 0.1) kg/l

Volatile organic compound (VOC) content

Solvent free according to TRGS 610
Technical Information

Shore A Hardness

After 28 days

28

After 8 hours

16

Secant Tensile Modulus

0.45 N/mm2 at 100 % elongation (+23 °C)

(ISO 8339)

Elastic Recovery

90 %

(EN ISO 7389)

Tear Propagation Resistance

8.0 N/mm

(ISO 34-2)

Movement Capability

± 25 %

(EN ISO 9047)

± 35 %

(EN 14188-2)

Chemical Resistance

Sika® Icosit® KC 450/30 is resistant to:

  • Water

  • Sea water

  • Diluted alkali

  • Cement slurry

  • Neutral water-based dispersed detergents or cleaners

  • Domestic and municipal sewage

Sika® Icosit® KC 450/30 is temporarily resistant (72 hours) to:

  • Diesel

  • Oil

  • Jet fuel

Sika® Icosit® KC 450/30 is NOT resistant to:

  • Alcohols

  • Concentrated organic and inorganic acids

  • Concentrated alkalis

  • Hydrocarbons other than those already listed above

Contact Sika® Technical Services for additional information.

Service Temperature

Maximum

+80 °C

Minimum

-40 °C

Application

Application Information

Mixing Ratio

Part A : Part B

100 : 1.5 by volume

Product Temperature

Maximum

+40 °C

Minimum

+5 °C

Ambient Air Temperature

Maximum

+40 °C

Minimum

+5 °C

Relative Air Humidity

Maximum

90 %

Minimum

30 %

 

Substrate Temperature

Maximum

+40 °C

Minimum

+5 °C

NOTE: Beware of condensation. Substrate temperature during application must be at least +3 °C above dew point.

Pot Life

At +23 °C and 50 % R.H.

~20 minutes

Curing Time

Function

Curing conditions

Time

Full mechanical properties

+23 °C and 50 % R.H.

24 hours

Trafficable with rubber car tyres

(broadcast and recessed joint)

+23 °C and 50 % R.H.

3.5 hours

Tack Free Time

Without broadcasting at +23 °C and 50 % R.H.

3.5 hours

With broadcasting at +23 °C and 50 % R.H.

1 hour
Application steps

SUBSTRATE QUALITY

Concrete substrates can be dry or matt damp with no visible surface moisture. All other substrates must be dry.

All substrates must be clean, 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.

SUBSTRATE PREPARATION

Poor adhesion due to inadequate surface preparation

NOTE: Primers are adhesion promoters. Primers cannot replace proper surface preparation and surface cleaning.

  1. Do not use primers for improving poorly prepared or poorly cleaned joint surfaces.

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 pre-treatment procedures must be followed:

ASPHALT (COMPLYING WITH EN 13108-1 AND EN 13108-6)

Preconditions

Fresh cut asphalt must have a bonding surface with minimum 50 % exposed aggregate.

  1. Prime the surface with Sika® Primer-115 applied with a brush.

For more detailed information especially before application on asphalt, rubber or EPDM, contact local Sika® Technical Services.

CONCRETE, STEEL, STAINLESS STEEL

  1. Prime the surface with Sika® Primer-3 N or Sika® Primer-115 applied with a brush.

For more details of the primer or pretreatment products, refer to the corresponding Product Data Sheet. Contact Sika® Technical Services for additional information.

DAMP OR GREEN CONCRETE

  1. Prime the surface with Sikadur®-32+ by brush, refer to the Product Data Sheet.

MIXING

  1. Mix Part A for 60 to 90 seconds using an electric mixer with a U-shaped paddle (~600 rpm).
  2. Add Part B (Booster), to Part A.
  3. IMPORTANT: Do not mix excessively. Mix Part A + Part B (Booster) continuously for 2 to 3 minutes until a uniform mix is achieved.

APPLICATION

IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

PRIMING

  1. Prime the joint surfaces as recommended in substrate preparation. NOTE: Avoid excessive application of the primer.

APPLICATION

  1. Fill the joint, leaving a 3 mm recess without trapping air. Pour the Product into the joint ensuring that it comes into full contact with the adhesion area of the joint.
  2. If required, wait ~1 hour (at +23 °C) before broadcasting the joint surface with quartz sand.

Application to sloped sections

NOTE: Between 15 to 70 mm width and thickness, the Product is suitable for application to sections with a maximum longitudinal slope of 0.0 % to 3 %. In the case of application on sections with a higher longitudinal slope, add Sika® Extender T up to a maximum of 3 % by weight.

  1. Prior to full project application, conduct trials to define the correct addition of Sika® Extender T needed.
  2. For applications other than 15 to 70 mm width and thickness, please contact Sika® Technical Services for further information.
 

CLEANING OF TOOLS

Clean all tools and application equipment immediately after use with Sika® Remover-208, Sika® Cleaning Wipes-100 or Sika® Thinner C. Once cured, hardened material can only be removed mechanically.

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