Product Data Sheet Show all documents

Sikaflex®-2c SL

Two-component, self-leveling, polyurethane elastomeric sealant

Sikaflex®-2c SL is a 2-component, premium-grade, polyurethane-based, elastomeric sealant. It is principally a chemical cure in a self-leveling consistency.

  • True self-leveling properties.
  • Capable of ±25 % joint movement.
  • Chemical cure allows the sealant to be placed in non-moving joints exceeding 12 mm in depth.
  • High elasticity with a tough, durable, flexible consistency.
  • Exceptional cut and tear resistance.
  • Exceptional adhesion to most substrates without priming.
  • Available in 35 architectural colors.
  • Color uniformity assured via Color-pak system.
  • Available in pre-pigmented Limestone Gray (no Color-pak needed).
  • Self-leveling consistency, easy to apply in horizontal joints.
  • Easy to mix.
  • Paintable with water, oil, and rubber-base paints.
  • Jet fuel resistant.
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Product Data Sheet Show all documents

Usage

  • Intended for use in all properly designed working joints with a minimum depth of 6 mm.
  • Ideal for horizontal applications.
  • Placeable at temperatures as low as 5 °C.
  • Adheres to most substrates commonly found in construction.
  • Submerged conditions, such as canal and reservoir joints.
 

Advantages

  • True self-leveling properties.
  • Capable of ±25 % joint movement.
  • Chemical cure allows the sealant to be placed in non-moving joints exceeding 12 mm in depth.
  • High elasticity with a tough, durable, flexible consistency.
  • Exceptional cut and tear resistance.
  • Exceptional adhesion to most substrates without priming.
  • Available in 35 architectural colors.
  • Color uniformity assured via Color-pak system.
  • Available in pre-pigmented Limestone Gray (no Color-pak needed).
  • Self-leveling consistency, easy to apply in horizontal joints.
  • Easy to mix.
  • Paintable with water, oil, and rubber-base paints.
  • Jet fuel resistant.

Packaging

5.7 L unit and 11.4 L units (1.5 and 3 US gal. units)

Color-pak is purchased separately.

Limestone Gray color available pre-pigmented.

Colour

A wide range of architectural colors are available.

Special colors available on request.

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

  • ASTM C920, Type M, Grade P, Class 25, use T, NT, M, G, A, O, I.
  • Federal Specification TT-S-00227E, Type 1, Class A.
 
Product Information

Shelf life

12 months in original, unopened containers.

Storage conditions

Store dry at 5–35 °C
Condition material to 18–24 °C before using.
Technical Information

Shore A hardness

40 ± 5 (21 days at 23 °C and 50 % R.H.)

(ASTM D2240)

Tensile strength

~1.2 MPa (175 psi) (21 days at 23 °C and 50 % R.H.) 

(ASTM D412)

Tear strength

~17.5 N/mm (23 °C and 50 % R.H.)

(ASTM D624)

Chemical resistance

Good resistance to water, diluted acids, diluted alkalines, and residential sewage. Consult Technical Service for specific data.

Resistance to weathering

Excellent

Service temperature

−40 °C to 75 °C

Adhesion in peel

Peel Strength (concrete)Adhesion loss

~133.4 N (~30 lbs.)

0 %

(23 °C and 50 % R.H.)

Tensile stress at specified elongation

0.68 MPa (100 psi) at 100 % (21 days at 23 °C and 50 % R.H.)

(ASTM D412)

Application

Application Information

Ambient air temperature

4 °C to 38 °C

Sealant should be installed when joint is at mid-range of its anticipated movement.

Substrate temperature

4 °C to 38 °C 

Sealant should be installed when joint is at mid-range of its anticipated movement.

Curing time

Tack-free Time

6–8 hours

Final Cure

3 days

Application time

4h (23 °C and 50 % R.H.)

(FS TT-S-00227E)

 
Consumption

Consumption

Joint length [m]
per 1000 ml of product		Joint width (mm)Joint depth (mm)

27

6

6

16

10

6

12

13

6

52010
32512
23015
1.24020
Application steps

SUBSTRATE PREPARATION

Joint wall surfaces must be clean, sound, and frost-free. Joint walls must be free of oils, grease, curing compound residues, and any other foreign matter that might prevent bond. Ideally this should be accomplished by mechanical means. A roughened surface will also enhance bond. Bond breaker tape or backer rod must be used in bottom of joint to prevent bond.

   

Priming is typically not necessary. Most substrates only require priming if sealant will be subjected to water immersion after cure. Testing should be done, however, on questionable substrates, to determine if priming is needed. Consult Technical Service or Sikaflex Primer Technical Data Sheet for additional information on priming.

 

MIXING

Pour entire contents of Component ‘B’ into pail of Component ‘A’. Add entire contents of Color-pak into pail and mix with a low-speed drill (400–600 rpm) and mixing paddle. * Mix for 3–5 minutes to achieve a uniform color and consistency. Scrape down sides of pail periodically. Avoid entrapment of air during mixing. Color-pak must be used with tint base. Note: When mixing 11.4 L (3 gal.) unit, two containers of Component B and two color-paks must be used. *For pre-pigmented Limestone base, just mix with low speed drill and Sikaflex paddle (no Color-pak needed).

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