Polyurethane Sealants - 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. ASTM C-920, Type M, Grade P, Class 25, use T, NT, M, G, A, O, I. Federal Specification TT-S-00227E, Type 1, Class A.

• True self-leveling properties.
• Capable of ±50% joint movement.
• Chemical cure allows the sealant to be placed in non-moving joints exceeding 1/2 in. 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 (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.

Usage

• Intended for use in all properly designed working joints with a minimum depth of 1/4 inch.
• Ideal for horizontal applications.
• Placeable at temperatures as low as 40 °F.
• Adheres to most substrates commonly found in construction.
• Submerged conditions, such as canal and reservoir joints.

Advantages

• True self-leveling properties.
• Capable of ±50% joint movement.
• Chemical cure allows the sealant to be placed in non-moving joints exceeding 1/2 in. 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 (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

1.5 gal. unit. 3 gal. units. Color-pak is purchased separately. Limestone Gray color available pre-pigmented.

Color

A wide range of architectural colors are available.

Special colors available on request.

Product Details

Product Information

One year in original, unopened containers.

Store dry at 40-95 °F (4-35 °C). Condition material to 65-75 °F before using.

Technical Information

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

−40 °F to +170 °F (−40 °C to 77 °C)

Application

Application Information

40 °F (4 °C) to 100 °F (38 °C). Sealant should be installed when joint is at mid-range of its anticipated movement.

40 °F (4 °C) to 100 °F (38 °C). Sealant should be installed when joint is at mid-range of its anticipated movement.

Application Steps

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 Product Data Sheet for additional information on priming.

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 Sikaflex 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 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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