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Sikasil® SL 189

(former MSeal SL 189)

Ultra-low modulus silicone sealant for concrete and asphalt substrates

Sikasil® SL 189 is a high performance, one-part, moisture curing silicone construction sealant. The Product offers ultra-low modulus, fuel and UV resistant, elastomeric seal. The ultra-low modulus minimises the strain on the asphaltic joint face, which is necessary due to the low tensile strength of asphaltic paving materials.

  • Ready for use
  • Low stress on substrate due to the low modulus of the sealant
  • No primer required
  • Very good durability
  • Adapts to joint width and alignment irregularities
  • Wide service temperature range
 
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Usage

Sikasil® SL 189 is used for sealing:
  • Movement or expansion joints
  • Saw-cut joints for crack control
  • Shaped and spalled joints
  • Can lights and electrical cables in airport runway lighting
  • Connection joints between concrete and asphalt
  • Saw-cut openings used to encapsulate and seal sensitised wiring loops for control of traffic signals, traffic counters, parking lot gates, ticket dispensers, and other similar equipment.
Please note:
  • The Product is not suitable for permanent water immersion.
  • Do not use in a totally confined space, because the sealant requires atmospheric moisture to cure.
 

Advantages

  • Ready for use
  • Low stress on substrate due to the low modulus of the sealant
  • No primer required
  • Very good durability
  • Adapts to joint width and alignment irregularities
  • Wide service temperature range
 

Packaging

600 mL sausage and 857 mL cartridge. Bulk pack on request.

Colour

Dark grey

Product Details

Product Information

Composition

Silicone

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 +25 °C. Always refer to the packaging.

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

Density

1.3 kg/L

(ISO 1183-1)

Product declaration

ASTM D5893/D5893M-16

Type SL

ASTM C920-18

Type S, Grade P, Class 100/50, Use T
Technical Information

Shore hardness

Shore 00

Cured 25 days at +23 °C and 50 % R.H.

~40

Secant tensile modulus

Cured at (50 ± 5) % R.H. Measured at 150% elongation at +23 °C

0.05 N/mm2

Shrinkage

Loss of volume

< 2 %

Elastic recovery

~75 %

(EN ISO 7389)

Movement capability

100/50

(ASTM C719)

Service temperature

Maximum

+145 °C

Minimum

-30 °C

Elongation at break

750 %

(ISO 37)

Application

Application Information

Sag flow

Self-leveling, can be used on slopes ≤ 3%

Material temperature

Maximum

+40 °C

Minimum

+5 °C

Ambient air temperature

Maximum

+40 °C

Minimum

+5 °C

Dew point

The substrate temperature must be at least +3 °C above dew point to reduce the risk of condensation decreasing adhesion.

Substrate temperature

Maximum

+40 °C

Minimum

+5 °C

Backing material

Use closed cell, polyethylene foam backing rod.

Curing time

< 21 days

(CQP049-2)

Skinning time

At +23 °C and 50 % r.h.

60 min

Tack free time

~5 hours

(EN 14187-2)
Consumption

Consumption

Joint depth

Joint width:
4 mm

Joint width:
6 mm

Joint width:
8 mm

Joint width:
12 mm

Joint width:
20 mm

6 mm

25 m

16.6 m

12.5 m

8.3 m

5 m

8 mm

-

12.5 m

9.3 m

6.5 m

3.7 m

10 mm

-

-

7.5 m

5 m

3 m

12 mm---4.1 m2.5 m

Joint depth

Joint width:
4 mm

Joint width:
6 mm

Joint width:
8 mm

Joint width:
12 mm

Joint width:
20 mm

6 mm

37.5 m

23.8 m

17.8 m

11.9 m

7.1 m

8 mm

-

17.8 m

13.3 m

8.9 m

5.3 m

10 mm

-

-

10.7 m

7.1 m

4.2 m

12 mm---5.9 m3.5 m
Application steps

SUBSTRATE PREPARATION

The substrate must be sound, clean, dry and free of contaminants such as dirt, oil, grease, cement laitance, sealant residues and poorly bonded coatings which could affect adhesion of the primer and sealant.

The substrate must be of sufficient strength to withstand the stress induced by the sealant during movement.

  1. Use techniques such as wire brushing, grinding, grit blasting or other suitable mechanical methods to remove all weak substrate material.
  2. Repair all damaged joint edges with suitable Sika repair products.
  3. Remove dust, loose and friable material from all surfaces before applying the sealant.

Never apply the Product to damp or wet concrete, to asphalt, or during rain.

 

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.

 

 

Ambient temperature

Note: In colder temperatures, reactions happen slower, leading to longer open and curing times.
In warmer temperatures, reactions occur faster, resulting in shorter open and curing times.
To guarantee complete curing, maintain material and structure temperatures above the minimum limit at any location and any point during the curing process.

  1. Install the cartridge into a manual or air-operated gun.
  2. Fill from the bottom up to within 3 mm of the roadway.
  3. Where required, strike off just below surface level and remove any excess material.

CLEANING OF EQUIPMENT

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

 

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