Sikaflex®-2c SL
Sikaflex®-2c SL is a 2-component, premium-grade, polyurethane-based, elastomeric sealant. It is principally a chemical cure in a self-levelling consistency.
- True self-leveling properties
- Placeable at temperatures as low as 4 °C (40 °F)
- Adheres to most substrates commonly found in construction
- Capable of ± 50 % joint movement
- Chemical cure allows the sealant to be placed in non-moving joints exceeding 13 mm (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 colours
- Colour uniformity assured via Color-pak system
- Available in pre-pigmented Limestone (no Color-pak needed)
- Self-levelling consistency, easy to apply in horizontal joints
- Easy to mix
- Paintable with water-, oil-, and rubber-based paints
- Jet fuel resistant
Usage
Sikaflex®-2c SL is intended for use in all properly designed working joints with a minimum depth of 6 mm (1/4 in)- Horizontal joints
- Sealing applications in canal and reservoir joints (submerged conditions)
Advantages
- True self-leveling properties
- Placeable at temperatures as low as 4 °C (40 °F)
- Adheres to most substrates commonly found in construction
- Capable of ± 50 % joint movement
- Chemical cure allows the sealant to be placed in non-moving joints exceeding 13 mm (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 colours
- Colour uniformity assured via Color-pak system
- Available in pre-pigmented Limestone (no Color-pak needed)
- Self-levelling consistency, easy to apply in horizontal joints
- Easy to mix
- Paintable with water-, oil-, and rubber-based paints
- Jet fuel resistant
Packaging
5.7 L (1.5 US gal) and 11.4 L (3 US gal) units
Note: Color-pak System is available separately. Limestone Gray colour is available pre-pigmented.
Colour
A wide range of architectural colours are available. Special colours are available on request.
Product Details
APPROVALS / CERTIFICATES
Meets ASTM C-920, Type M, Grade P, Class 25, use T, NT, M, G, A, O, I.
Meets Federal Specification TT-S-00227E, Type 1, Class A.
Shelf Life
24 months in original, unopened containers
Storage Conditions
Store dry, at temperatures between 4 °C and 35 °C (40 °F and 95 °F). Condition the product at a temperature between 18 °C and 24 °C (65 °F and 75 °F) before use.
Shore A Hardness
| 35 ± 5 (21 days) | (ASTM D2240) |
Tensile Strength
| 1206 kPa (175 psi) (21 days) | (ASTM D412) |
Tear Strength
| > 45 lb/in | (ASTM D624) |
Chemical Resistance
Good resistance to water, diluted acids, diluted alkalines, and residential sewage. Contact Sika Canada Technical Service for specific data.
Resistance to Weathering
| Excellent |
Service Temperature
−40 °C to +77 °C (−40 °F to +170 °F)
Adhesion in Peel
| Peel Strength (concrete) | Adhesion Loss |
| 9.5 kg (21 lb) | 0 % |
Tensile Stress at Specified Elongation
| 689 kPa (100 psi) at 100 % (21 days) | (ASTM D412) |
Application
Ambient Air Temperature
4 °C to 38 °C (40 °F to 100 °F)
Substrate Temperature
4 °C to 38 °C (40 °F to 100 °F)
Curing Time
| Tack-free time | 6-8 hours |
| Final cure | 3 days |
Application Time
| 4 h | (TT-S-00227E) |
Yield
Linear metre of Sealant per Litre
| Width/Depth | 6 mm (1/4 in) | 10 mm (3/8 in) | 13 mm (1/2 in) |
| 6 mm (1/4 in) | 24.8 | ||
| 10 mm (3/8 in) | 16.5 | 11 | |
| 13 mm (1/2 in) | 12.4 | 8.3 | 6.2 |
| 19 mm (3/4 in) | 8.3 | 5.5 | 4.1 |
| 25 mm (1 in) | 3.1 | ||
| 32 mm (1.25 in) | 2.5 | ||
| 38 mm (1.5 in) | 2.1 |
SUBSTRATE QUALITY
Joint wall surfaces must be clean, structurally sound, and frost-free. Joint walls must be free of oils, grease, curing compound residues, and any other foreign matter that might prevent bond.
SUBSTRATE PREPARATION
Substrate preparation 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 three-sided bond.
Note: Joint dimension should allow for 6 mm (1/4 in) minimum and 13 mm (1/2 in) maximum thickness for sealant. Proper design is 2:1 width to depth ratio.
Priming is typically not necessary. Most substrates only require priming if sealant will be subjected to water immersion after cure. Testing should be carried out, however, on questionable substrates, to determine if priming is needed, contact Sika Canada Technical Service or refer to Sikaflex® Primer Product 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 at low-speed (400–600 rpm) using a drill fitted with a proper mixing paddle. Mix product for three (3) to five (5) minutes to achieve a uniform colour and consistency*. Scrape down sides of pail periodically. Avoid entrapment of air during mixing. Color-pak system must be used with tint base.
Note: When mixing a 3 US gallon unit, two (2) containers of Component B and two (2) color-paks must be used.
*For pre-pigmented Limestone base, just mix with low speed drill and proper mixing paddle (no Color-pak needed).
CLEAN UP
Uncured material can be removed from equipment and tools using Sika Cleaning Wipes or a solvent, such as xylene. Strictly follow solvent manufacturer’s warnings and instructions for use. Cured material can only be removed manually or mechanically.
